Get good Lipo battery and Charger for Racing Drone

As we know, Lipo battery is very important for rscing drones, if you want to win a drone racing, get a good Lipo battery is very important. But how to choose a good Lipo battery and how to care our Lipo battery? Next let me introduce the Lipo battery and charger for racing 

drone.

Even if you buy a pre-built drone like the Vortex 250 Pro or Vendetta, racing drones like these don’t come with batteries. I won’t go into all the specifics on how to pick a good LIPO Battery in this article, but just know that the most common battery for a racing drone is 14.8v 1300mah 60C. A battery with specifications like this will give you the best power-to-weight ratio for the drones we recommend and the higher C rating means that it will handle higher currents and last longer than a battery with a lower C rating. I recommend Tattu 1300mAh 4S 75CLipo battery and Tattu Rline 1300mAh 4S 75C Lipo battery.

Get at least two or three batteries to start with, since flight time on a racing drone is very limited and you’ll need as much practice as you can get. You can buy even more batteries in the future, but if you have more than just two or three, you’ll need to look into Parallel charging so you don’t spend 10 hours trying to charge all of them. One thing you should buy (no matter what battery you get) is a voltage checker. LIPO batteries do not like being over discharged and can even break if discharged too much. It doesn’t really matter what kind of LIPO checker you get, but the Gens Ace & Tattu LIPO to USB voltage checker is nice because it can also turn your battery into a Phone charger!

A Good Charger

Don’t buy a $15 charger. You will regret it! LIPO batteries are not like AA batteries. They should be charged and handled with care and never overcharged. With a good charger and a little common sense, LIPO batteries are not a huge fire hazard, but using a cheap low quality charger can be extremely dangerous. Get a good charger (nothing cheaper than $30), read the manual and everything will be fine.

If you plan on charging more than one battery at a time, buy a parallel charger and watch our video about parallel charging. For parallel charging, you’ll need a charger that can output at least 8 amps. That should be enough to charge up to 6 of the batteries we recommended in about an hour. If you plan on charging even more than 6 batteries at once, or charging at a faster rate, higher amp output is always better. The EV-Peak C4 is a good starter charger, but you can always go crazy and get something like the EV-Peak SD1.

Racing Drone Lipo battery online Shop:

USA: http://www.genstattu.com/

Europe: http://www.gensace.de/ 

The difference between li-ion and li-polymer battery

Lipo batteries often refer to the polymer lithium batteries. According to the electrolyte materials, Li-ion battery is divided into liquid lithium ion battery and polymer lithium battery or plastic lithium battery. Do you know what are the difference between li-ion and li-polymer battery? Let us review these common senses with Gens Ace.

The difference between li-ion and li-polymer battery

Compare with li-ion battery,lipolymer battery has the following characterizations:
1. It would not leak the electrolyte, since it uses the colloidal solid rather than the liquid electrolyte.
2. It can be made into thin battery. For example, a 3.6V 400mAh 15C battery can have the thickness of 0.5mm.
3. It can be designed into multiple shapes.
4. The battery can distort and be flexible. The macromolecule battery can distort up to 900 around.
5. It can be made into single high voltage: the battery with liquid electrolyte can only acquire the high voltage and macromolecule battery by putting several batteries in series.
6. Because the battery itself does not have liquid, it is possible to obtain high voltage by making multi-layer combination inside the single battery.
7. The capacity is twice as that of the Li-ion battery.

The lifespan of lipo battery

The factor influenced the lifespan is the charging cycle, and the times of charging will not directly influence the lifespan.

For example, the first day, we charge the battery after consumed half of the power, and the second day, we repeat that process. This is just one charging cycle rather than two. Therefore, a cycle may be finished by several times of charging. Every single charging cycle will reduce the power slightly. However, a superior battery can maintain 80% power after many charging cycles. That is why some lipo battery can use normally after two or three years. Certainly, it is also needed that we replace the lipo battery if the lifespan has ended.

The lifespan of lipo battery is commonly 300-500 charging cycle. We set the Q as the power provided by one-time fully discharging. Ignoring the reduction of every charging cycle, the lipo battery can power 300Q-500Q through its lifespan. Accordingly, if we charge the battery after consuming power, the battery could be charged for 600-1000 times. (if we charge the battery after consuming 1/3 power, the battery could be charged for 900-1500 times.) we cannot tell the exact number of charging times if we charge randomly. In a word, the total power 300Q-500Q is constant. Therefore, the lifespan is related to the total charging power rather than the charging times. Besides, the difference between the influence of deep charging and discharging and the influence of light charging and discharging to lipo's lifespan is similar.

In fact, light charging and light discharging benefit more to the lipo battery. Only when the lipo battery is calibrated by the product has the need to charge and discharge battery deeply. Therefore, we can use the lipo battery for convenience and do not have to concern about the lifespan.

If the 2 cell lipo battery is used above the regulated temperature (over 35 degree centigrade), the power will continuously decrease, which means the flight time would not be so long. If charged under the high temperature, the battery would be further damaged. It is unavoidable that storing under the high temperature will hurt the battery's quality.

If using below the 4 degree centigrade, you would also find the flight time of the battery has been reduced, and even some original lipo batteries of mobile phones cannot be charged. But, this situation is just temporary. Differ from using in the high temperature, once the temperature gets higher and the molecules inside the battery are heated, the battery would recover to the normal energy.

To maximize the performance of lipo battery, we should use it more often and make the electron flow. If we cannot use the lipo battery frequently, please remember to make a charging cycle and calibrate it (charge and discharge deeply) every month.
Source: http://www.genstattu.com/blog/the-difference-between-li-ion-and-li-polymer-battery/

How to buy battery and use precautions

How to buy battery?

1. To choose has "national exemption" "Chinese famous brand" marks of the battery products and local famous brand products, that have the quality guarantee. Such as Gens ace&Tattu RC lipo battery.

2. According to requirement of the electrical appliances, to choose the battery type and size, and also according to the size of the electrical appliances power consumption and characteristic, to purchase the fit battery.

3. Check the battery of the production date and shelf life, to choose the new battery, the new battery has better performance.

4. Check the battery of appearance, should to choose and buy the 15c battery of package exquisite,look neat and clean and no leakage.

5. Pay attention to the battery marks, shall identify the manufacturer name, polarity, type, nominal voltage, trademark and others on battery. On the sales packaging, shall have the address, production date and shelf life or indicate shelf life of deadline, execution of the standard number. When buying the ALKALINE zinc manganese battery should has the "ALKALINE" or "LR".

6. Due to mercury in battery is harmful to the environment, in order to protect the environment, when you purchase the battery should has trademark with "no mercury" "0% mercury" "no contain mercury".

Using the battery should be attention

1. Keep the clean between electrical and battery contact parts, wipe with wet cloth when necessity, after drying according to the polarity marked loaded correctly. It's very important things when install the battery should to see clearly the battery polarity, we should be according to the requirement of electrical appliances manual installation using the recommended battery; If not,maybe lead to failure, and damage the electrical appliance or battery.

2. Don't mix of the old and new batteries, should be replaced them at the same time. And don't mix the same type but different brand of batteries, or you will make a set of some batteries in the battery over discharge in use, thus increasing the battery of leakage possibility.

3. Don't heat or charge for disposable batteries, otherwise the possibly explosion.

4. Don't short circuit, to avoid the battery leakage and heat by damage to the insulating outer packing.

5. Remove the battery when you don't use the electrical appliances for a long time, and after used should turn off the power, lest make the batteries continue to discharge its internal battery adverse chemical reaction and lead to leaks.

6. Don't discarded the wasted battery, as far as possibly to separated with other rubbish.
Source: http://www.genstattu.com/blog/how-to-buy-battery-and-use-precautions/

Best uav battery packs for multirotor fly Long flight time

Are you looking for UAV battery packs for your multirotor X8 or X4 etc., but still confusing about which brand is the best one and most suitable for multirotor? For fly long time pls read ahead and you will find out the answer.

How to choose UAV battery packs

Yes, let us come back to this topic now. How to choose the best uav battery? Before that, tell me what do you really command. Here are some questions just need to clarify a few things. How long flight time do you need? How much current is flowing in a ciruit and at what voltage for your multirotor? How much carrying capacity do you plan to? After you choose one battery, you can use this calculator formula to calculate your flight time, flight times =(Battery Capacity * Battery Discharge /Average Amp Draw) * 60
For instance, you choose a UAV battery packs 6s 16000mAh, and calculate the average amp to be around 60 amps, make an assumption that 80% of battery capacity will be used, then the flight time is 12.8 minutes (Results vary from brands).

About smart UAV battery packs

What is smart battery? Smart battery management system (BMS) will smartly manage your battery. As every one knows, lithium polymer is delicate accessories and need the user take maintenance. Which brand is recommended? The Tattu smart 6S 22.2V 12000mAh battery packis a great choice for large-sized aerial photography vehicles such as the DJI S800, S1000, Gryphon X8, OnyxStar. This battery packs a ton of power in compact, giving you the flight time needed on your heavy-lift aerial photography rigs.

Conclusion for UAV battery packs

For fly a long flight times, choosing the right UAV battery pack is very important. Here I recommend using Tattu lipo which has gained most praise by FPV pilots. The following is Tattu Plus LiPo Battery Review by VidMuze who produces aerial cinematography, films, visual effects, tutorials and equipment reviews. You will make your choice after watching it.


Source: http://www.genstattu.com/blog/best-uav-battery-packs-for-multirotor-fly-long-flight-time/

Best 6s lipo battery for sale from Tattu and Gens ace

Maybe you are wandering in the remote control world, and you are familiar with all parts of your hobby models. But how to choose the best 6s lipo battery for your UAV/500 600 RC HELI/FPV/RC hobby drones etc.? Here allows me to introduce the best 6s lipo battery for sale from Tattu and Gens ace, which are professional battery for RC hobby and drones.

The range of 6s lipo discharge rate

Tattu and Gens ace 6s lipo battery packs have capacity from 15C to 75C, and more high C lipos will be produced. ALL of these high C lipos are beyond the bounds of multirotor, let FPV into the world of 3D flying, show high performance aircraft, and provide more power for you.

The range of 6s lipo capacity

Tattu and Gens ace 6s lipo battery packs have capacity from 1000mAh to 30000mAh, Stable automatic stacking technology endows single cell capacity of 30000mAh, higher than comparable size packs. High capacity, up to 30000mAh, will provide enough energy for your hobby models.

The wide applications of 6s lipo battery

Tattu and Gens ace 6s lipo battery packs are widely used in performance aircrafts such as RC heli 500 600 700 size (MIKADO LOGO500, ALIGN T-REX550/600, GAUI X5, Outrage 550, Hirobo SDX, etc), 180mm 250mm 280mm 310mm FPV Racing (Skylark M4-FPV250, INDY250 PLUS, Vortex, Emax Nighthawk 250, MOJO 280 etc) and big UAV drones such as DJI S800, S800EVO, Walkera QR X800, FreeFly CineStar 6, FreeFly CineStar 8, Freefly ALTA, etc.

Where to buy the best 6s lipo battery?

Here you come to the right place. Tattu and Gens ace 6s lipo battery for sale is via official online shop www.genstattu.com where has Local Service , Quality Assurance , Best Prices and Fastest Shipping. Free shipping over $49.99 in USA, Over $198 in Canada.
Source: http://www.genstattu.com/blog/best-6s-lipo-battery-for-sale-from-tattu-and-gens-ace/

How to cleaning drones and fixing drones

If you are a fan of drones, please remember to maintain the drone and other component. Preventing the dust and dirt is a very crucial immediate step of you. Actually, there is small difference between it and for various design. So there is a special system, but there are some other methods to clean the drone and to make it in the best condition. Within the following, we would learn how to clean the drones. First, you should prepare a tool-kit, and put all the fixing, cleaning, maintenance stuff into it. Remember to match the stuff with the drone's brand and model.

The must-have tools for cleaning drones

1. a soft cleaning brush

This is for some corners and gaps, and you can also use the pipeline pigging.

2. canning compressed air

This can clean the dirt of some "sensitive parts" such as the electric motor or circuit board around, which would not damage the drones.

3. isopropyl alcohol

This can clean your drone shell in perfect condition, which can wipe out grass stains, blood stains and any other kind of dirt, and would not damage the circuit.

4. ultra-thin fiber cloth

If you want to completely clean the drone by dismantling it, it is necessary to use this cloth as it can perfectly match the isopropyl alcohol.

5. three-in-one all-purpose lubricant

Carry a bottle of three-in-one all-purpose lubricant in case of emergency.

The must-have tools to fix the drone

It is possible to have trouble while the drone is flying or landing. As it is a precise device, any tiny change would influence its flying status and longevity. Therefore, it is wise to prepare needed tools and carefully deal with the drone's failure.

1. spare bracket

the bracket is one of the most important components of flying the drone. Once it has trouble, the drone should land immediately and replace the original bracket with the spare one.

2. tool kit

Remember to prepare all kinds of tools that can fix all the possible troubles. Maybe your drone is too advanced to have trouble or there's a matched and attached tool kit when you buy the drone, but you still need to take a screw-drive.

3. soldering iron

while you would not take the soldering iron with you all the time, there would be not better than having a soldering iron when the electronic failure happens. Compared with the amateur, the professional pilots always take the soldering iron. However, if you have never used the soldering iron before, it's better to search help from your friends or watch the guide video.

4. spare battery

If your drone has available spare multicopter battery, please fully charge it.

The notes for the greenhands:

1. Please check whether the ground is spacious enough; whether your drone is in good condition; whether the switch of the remote control is flexible.
2. Keep your 16000mah lipo battery be in full charge.
3. Keep your drone clean.
4. Do not fly the drone for too long.
Source: http://www.genstattu.com/blog/how-to-cleaning-drones-and-fixing-drones/

the main difference between lipo and NIMH battery

Ni-mh batteries A nickel Cmetal hydride battery, abbreviated NiMH or Ni CMH, is usually a variety of rechargeable battery. The chemical reaction on the constructive electrode is similar to that from the nickel Ccadmium cell (NiCd), with each using nickel oxyhydroxide (NiOOH). Even so, the damaging electrodes use a hydrogen-absorbing alloy as a substitute of cadmium. A NiMH battery can have 2 to 3 times the capacity of an equivalent size NiCd, and its energy density can approach that of a lithium-ion battery. Lipo batteries A lithium polymer battery, or far more properly lithium-ion polymer battery (abbreviated variously as LiPo, LIP, Li-poly and others), is usually a rechargeable battery of lithium-ion technologies inside a pouch format. As opposed to cylindrical and prismatic cells, LiPos are available in a soft bundle or pouch, which tends to make them lighter but additionally less rigid.
The designation "lithium polymer" has brought about confusion amongst battery customers because it may be interpreted in two ways. Originally, "lithium polymer" represented a producing technological innovation making use of a polymer electrolyte instead of the more frequent liquid electrolyte. The result is actually a "plastic" cell, which theoretically could be thin, versatile, and produced in different shapes, devoid of danger of electrolyte leakage. The technological innovation hasn't been fully created and commercialized and research is ongoing.
The second which means appeared soon after some companies applied the "polymer" designation to lithium-ion cells contained inside a non-rigid pouch format. That is now one of the most common use, through which "polymer" refers extra to a "polymer casing" (that is certainly, the soft, external container) rather then a "polymer electrolyte". When the design and style is often flat, and light-weight, it is not genuinely a polymer cell, due to the fact the electrolyte continues to be in liquid form, despite the fact that it might be "plasticized" or "gelled" by means of a polymer additive.These cells are often designated as "Lipo 7.4v 5000mah"; nonetheless, from a technological viewpoint, they are really exactly the same since the ones marketed just as "Li-ion", since the underlying electrochemistry may be the exact same.

1. Bodyweight

In each cell from the battery voltage , the NiMH is 1.2V, whilst the lithium battery 3.6V, lithium battery voltage is its three fold. The same style of lithium battery weighs lighter compared to the nickel-metal hydride batteries . We are able to see that every distinct weight battery itself , but because of 3.6V lithium battery substantial voltage, once the output voltage of the same to ensure that just one battery pack can lower the number of third leaving right after forming the battery weight and volume reduction .

2. Memory effect

NiMH batteries have memory result . Therefore, common discharge management can also be needed. This periodic discharge management belongs towards the fuzzy state to become taken care of , even some with no the best information discharge ( or perhaps a number of instances each and every discharge right after discharge are due to distinctive providers differ ) this cumbersome discharge management when applying NiMH batteries can't be avoided . Relative lithium batteries mainly because no memory result, inside a pretty effortless and basic to make use of . It is actually fully with out regard to simply how much residual voltage , direct is often charged , the charging time can be reduced naturally .

3. Self-discharge charge

NiMH batteries from 25 to 35% ( January ) , lithium batteries from 2 to 5% ( May possibly ) . Thereby obtained , the price of self-discharge NiMH batteries a lot increased than lithium .

4.Charging

Nickel-metal hydride batteries and lithium batteries can't overcharge resistance . As a result, the nickel-metal hydride battery frequent current charging PICKCUT control mode on the highest charging voltage , charging stops carry on because the greatest way of charging . The 7.4v lipo battery utilizing continual existing, continuous voltage charging mode is most effective.

5. Application

NiMH batteries: buyer electronic merchandise, remote management toys , hybrid vehicles , renewable energy programs; Lithium Battery: cell phones, laptops, energy tools, electric autos, backup electrical power lights , small home appliances.

The distinctions between Smart Battery And Ordinary Battery

The DJI new-released M600 brings significant breakthrough to your all UAV Location. Not simply the A3's self-adaptive flight techniques and new RONIN-MX is , but additionally the rather extended flight time supported by six sensible batteries.
It introduces that a custom-made battery management system and energy distribution board lets all 6 batteries for being turned on with a single button press, and keeps the system in flight during the occasion of a failure of the single battery, and allows customers to check out the battery standing in real-time throughout flight.

As many of us know, M100 has adopted intelligent batteries to help the big heavy device for extra expert aerial photography and longer time and distance making use of. Then what are the differences among Intelligent Battery and Ordinary Battery, why they are additional and much more widely made use of from the electronic ndustry?

1. Definition

A clever battery/A good battery system(SBS) is usually a rechargeable battery pack equipped using a built-in battery management process. The clever battery can internally measure voltage and existing, and deduce charge degree and SoH (State of Health) parameters, indicating the state with the cells, calculated and predicted information and facts to its SMBus Host below software package management.
A essential SBS like 3parts:Program Host,Sensible Charger and Intelligent Battery.

1.1 Positive aspects

Ordinary Battery

Ordinary Batteries are illusive and don't exhibit noticeable modifications as part of usage from each the user's along with the equipment's perspective. It appears the same when completely charged or empty, new or outdated and in have to have of replacement. A really massive defect is the fact that they signify an unpredictable supply of power.
Firstly, a consumer has very little know-how that their battery is about to run out or simply how much working time is left.
Secondly, products powered from the battery are not able to ascertain in the event the battery, in its existing state, is capable of supplying ample electrical power for an additional load (such as spinning up a difficult disk) or not.

Smart Battery

The Intelligent Battery presents a perfect resolution for several of the issues linked to batteries used in moveable electronic gear.

The Intelligent Battery provides the consumer with accurate state of charge data together with an precise prediction from the remaining working time.
Additionally, it Provides state-of-charge and full charge capacity; reflects capacity estimations; information battery historical past; together with cycle count, utilization pattern, servicing specifications, max error, and so on; configures charger on the right algorithm; reminds consumer of periodic support; protects battery from unauthorized use; and to reduce accidental method cut-off.

That is why clever battery is much more and even more popular and extensively employed.
A great good battery brand-Tattu plus(Gens ace 2s lipo), also have all these strengths when employing in your drones.

1.2 Charger

Ordinary Batteries chargers: It has to be individually tailored for use which has a particular battery size and chemistry and may perhaps lead to harm if applied on one more battery.
Wise Battery Charger: It periodically communicates that has a Sensible Battery and alters its charging characteristics in response to information presented by the Intelligent Battery.

1.3 Defects

The Clever Battery will include 25% towards the cost when compared to a Ordinary Battery.

It complicates the charger, most chargers for intelligent batteries are hybrid and also service for non-intelligent batteries.Necessitates periodic calibration.

In contrast together with the Wise Battery's down sides, it's much more and useful functions.We believe in the future, people will creat extra progressived technological innovation on Good Battery and conquer the value as well as other issues stage by step.

How to Choose the Best FPV LiPo Battery

FPV is more and more popular now among many RC hobbists and there are more and more newbies come into this hobby. Many new beginners write to us about how to begin and what are the most important point when flying FPV. Among all the questions, the best battery for FPV flight is very often asked.
Many Videos are now showing a battery that could be the best LiPo battery for long distance FPV flying. With the aide of FVP goggles, flying FPV is pretty exciting and real than any other RC drones or airplanes because of the goggles to see the real view in the first sight. Certainly, the spetacular speed of FPV is core for enjoying the FPV flight.

Usually the limiting component on an FPV aircraft for flight is the battery. In the past, I have used about 1300mAh, 45C and 3/4S for FPV, however, Tattu is the first UAV LiPo battery released Tattu 75C 4S 1300mAh LiPo Pack Battery, which get a very good popularity among clients. Certainly, Tattu have many batteries, but this time we will take this amazing one to see why it is so attractive.

                            Tattu 4S 1300 mAh 75C Li-Po Pack Battery

The 4S 14.8V 75c 1300mAh LiPO battery pack is a great choice for many small UAVs which require high discharge rates. This battery packs a ton of power in a compact form factor, giving you the flight time and power your need on your craft.

And the advantages is that Tattu LiPos are packed with vibration-proof & fire-proof material and luxury battery box. Make sure to get your battery in perfect condition. An automatic procedure & Computer system battery cell matching process ensures the batteries stability and quality. Different from the original Gens Ace series, TATTU is specialized for the UAV & UAS market, with their industrial quality (since Gens Ace is based on the Hobby area), their slogan "less is more", "more" means more flight time, more enjoyment, and more satisfaction , and "less" means less weight, simple design. Tattu always develops their products according to these 2 directions giving you a high quality battery.

Tattu's Stable automatic stacking technology enables single cell capacities of 1300mAh. This higher capacity than comparable size packs and without memory effect.

Tattu FPV battery provide high quality, reliable power for your FPV Nemesis 240 Mini, Skylark M4-FPV250, Mini Shredder 200, INDY250 PLUS, HOVERSHIP MHQ2(270), ZMR 250, Emax Nighthawk 250, Mini H, QAV250, QAV180/210, Danaus, Vortex 285, Mini H, FLIP FPV FRAME, Emax Nighthawk 250, ZMR 250, HOVERSHIP MHQ2, MOJO 280, etc.

Choose Tattu FPV battery, you will be surprised.More power, more flight time, and less weight.
Source: http://www.genstattu.com/blog/how-to-choose-the-best-fpv-lipo-battery/

How To Reduce The Potential Risk Of Drones?

The low-cost of buying and operating remotely piloted aircraft (drones) for commercial use has opened up a world of opportunity. With drones uses emerging in search and rescue, surveying, crop dusting and even deliveries, accidents, injuries and the potential for lawsuits are bound to follow. Some businesses are beginning to look at opportunities to revolutionize how basic services and dangerous tasks might be performed in the future. However, to revolutionize drones and make it more widely used, solving the potential risk of drones is the first and foremost task.

1. Natural Environment

Drones should avoid flying in complex terrain as far as possible to ensure the safety problem. We can’t fly drones in storm, high temperature and high humidity, rainy, cold or windy days. But on the other hand, many dangerous missions can be only done by drones.Then we need to adjust our mind, after all, the pilot's life is far more important than drone’s.

2. Safety by design

The responsibility of safe drone use does not just fall on the user. Manufacturers have recognised the importance of technology in developing drone safety.

The spareparts like flight control system, motors, prepellers, ESC and esc. Parts made by manufacturers should be in stable quality that they won’t easily broken, spcially in flying. And the drones battery used are supposed to be in good quality and condition, or the drone would drop down once the battery cann’t work and support it. A good 2s 7.4v lipo battery like Tattu,Turnigy with excellent and stable and they are lighter, so they are well recommended here for you.

3. Misoperation

When flying in the sky, drones need to be operated and controlled by pilots on the ground. Cause drones autopilot cannot think, the flying track is completely controlled by command of ground pilots.
To avoid errors caused by accident, on the one hand, the flight control system should be made more intelligent and has alarm function to the wrong operation.On the other hand, pilots should also improve operating level to fly more stable and professional.

4. Reduce the weight

Weight is one of the most effective way to reduce the potential risk of drones. This will come true with the emerging of light-duty and miniaturization of equipments and materials. On the other hand, multirotors equipped with parachute is another good choice to reduce the impact when drones falling.

5.Set no-fly zone

Geo-fencing, is an on-board GPS and mapping system (also known as "cyber fences") which prevents drones from flying into restricted airspace. There is a recognised need at the European Commission to encourage investment in technologies that are required to integrate drones into the aviation systems covering European airspace.

As long as no flying in the densely populated areas, a drone’s crash won't cause a severe damage to human. But in the densely populated area, the negative impact of drone’s crash will increase greatly. Without special approval, drones should not be flying in the densely populated are which will result in life risks. In addition, in the sparsely area, pilots can send massage to surrounding people to improve safety coefficient.

To improve drones’ safety and efficiency is the first step for more widely and variety used in many areas, so it requires manufacturers and hobbists effort together. Keep in mind the above 5 points, we will fly and enjoy our hobby in a more pleasant and safely environment.
Socrce: http://www.genstattu.com/blog/how-to-reduce-the-potential-risk-of-drones/

Basic common sense of choose RC car batteries

For any RC car, the inevitable need is the batteries, this passage introduces some common knowledge of automotive batteries of mainstream RC car batteries lipo.
The ways to choose and buy a battery is nothing more than a few aspects:Battery type/voltage/capacity/C number/size&shape/discharge plug type


Common battery type: NiCd/NIMh/LiPo/LiFe

NiCd, nickel-cadmium batteries, low cost, low capacity, big pollution, memory effect, can only be found in some cheap suits car now,I do not recommended strongly.
The NiMh, nickel metal hydride batteries, in AA and AAA batteries, NiMh absolutely is the mainstream, but in the remote control model of the battery is not recommended.
LiPo, lithium polymer battery, it is now the mainstream type in the model, using a wide range, full of types various models, is the focus part in this passage to introduce
LiFe, and lithium iron batteries, not too mainstream, generally used in remote control, rarely used as a power of the electric car.

The most extensive LiPo lithium polymer battery in RC car
 

LiPo, full named Lithium Polymer Battery, Lithium Polymer Battery shell for soft package, evolved by Li - ion Lithium ion Battery. Voltage of lithium ion single section is 3.6 V, due to the high active, explosion probability is bigger, so it almost replaced by LiPo , now most of batteries we used in cell phones are LiPo.

Voltage: Nominal voltage of LiPo batteries are 3.7 V, when fully charged, the current mainstream single section batteries are 4.2 V, on the currently model, high-voltage batteries appeared gradually, full charged high-voltage batteries with single section is 4.35 V.

Each cell of 3.7 V call 1 s, but our car with 3.7 V is not enough, the mainstream battery voltage is 7.4 V, then put the lipo 7.4v 5000mah batteries together, increase the voltage.

How many 3.7 V and how many S are put together, the voltage is 3.7 V multiplied by how many S, 2 S for example is 3.7 * 2 = 7.4 V. 3 s is 3.7 * 3 = 11.1 V, and so on.

Lithium-ion batteries also involves encapsulation, when you buy a battery you will see some write 2s1p, some write 2s2p, what is the meaning of this 2 s is said above, 2 s = 3.7 * 2 = 7.4 V, then 2 p?

Due to restrictions, such as technology, volume and cost of each cell capacity is limited, how the simplest way to increase capacity? Is to put two same batteries in parallel, this is the concept of P.

For example 2 batteries in parallel together in 1 3.7 V, call it 2 p; But if use of three batteries in parallel to a 3.7 V, so is the 3 p.

So, 2s2p, can be understood as four same batteries, the two pieces of parallel, then call 1s, and then parallel the other 2 pieces of the other 1 s, put the two 1 s together, become a 2 s, the battery is called 2s2p


Capacity: each cell has its own rated capacity, the higher the capacity, the time can be used the longer, in some cases we will especially selection of small capacity for my weight loss with frame, frame performance of ascension. Small capacity is usually lighter in weight.

Discharge C: is the discharge capacity. C number, the greater the battery can in the short period of time after their own capacity.

1 C, which is inner an hour discharge its own capacity. how many C, how much is a copy of one hour after their own capacity. 60 c for example is 1/60 hours, that is, one minute, after its own capacity. C, the greater the number of cells, and its performance is higher, the more expensive.

Several large batteries for the same car, the difference between a high C and low C in a small battery is: the greater the number, the explosive force, its start with higher speed, the less heating battery after use.

Discharge current: C number can be interpreted as a unit, not current. Current should be understand with capacity. C number multiplied by capacity is the discharge current.

The discharge current of the battery is battery’s ability, but actually, the consumption of the current size is determined by the electric harmonic motor. As long as you buy a bigger current of the battery than you consume electric harmonic motor is well.

Shapes and sizes: as long as player buy the corresponding size and shape according to the requirements.most of LiPo are elongated, but there are some old models is cylindrical, so can only choose nimh electricity or cylindrical capacity low lithium electric model.

Plug type: the mainstream is T plug, tamiya plug, JST plug, XT60 plug, JST plug, banana plug (99% of the 4 mm banana plug and 1% 5 mm banana plug), and other such as oda palace, also have XT90, but relatively fewer.

The choice of the plug, the plug of the power equipment according to oneself to choose corresponding, remember that the mainstream plug is T plug, if you buy the wrong plug, it will cause electrical equipment can't connected to the 3s 11.1v lipo battery.

What Equip Was Used At First Taiwan FPV Racing Competition?

Taiwan ford environmental restoration park host the first ever FPV racing drone contest, this FPV is different from the well known aerial photography UAV. FPV drone is more focus on racing, and is operated by the first-person perspective screen through the OSD Monitor system which is more realistic than a flight simulation flight game. Gens ace here ,brand from a famous LiPo factory will bring us report after the game:

What is FPV?

FPV, full name: First Person View, but generally refers to the FPV that is a first person perspective UAV(UAV battery). And what it differ from the general speaking Aerial Photography UAV (which is more focus on stability and the ability of photographing) is that FPV is more in pursuit of flexibility, speed and flight experience.

FPV is divided into fixed wing and multi-axis vehicle, although the former originated earlier,but the latter gradually began to develop in recent years, foreign countries also started some multi-axis FPV drone racing, although in Taiwan it is not yet universal ,But there are also a lot of amateur players in China, and these lovers gather together to hold the Taiwan’s first FPV drone racing contest.

Competition System

Since it is the first FPV drone racing in China ,so many rules and the system is still in groping, but generally it’s referred to other countries FPV competition regulations. The Competition adopting Circuit, a total of three times bypass, four participants ,they must bypass two main green bars obstacles, and pass through the four limit high arches,if does not get through arch,it will be required to fly again.And then elect the champion through semi and final champion.

The reason why FPVs don’t take off together is to avoid mid-air collision, the second aspect is to avoid radio frequency interference, as some times the FPVs do not response(like just lie on the ground,can’t move), and also remote control device around the site will interfere , for example, frequency interference from remote control cars, remote control vessels.
The game take place at an altitude of about 150M, Mucha - Taiwan Hang environmental restoration Crawford Park, the venue is quite open for the FPV racers to fly with few limit.

Unique gameplay

Before playing FPV, first you need to know that FPV drone players crontrol the FPVs by a first-person perspective of the Monitor (or glasses), instead of looking at the body to control it. Why play like this? It’s because the body of PFV is quite flexible, when carrying around a cone or turning flight, it is difficult to distinguish the state of the fuselage and flight attitude, and therefore it must be a first-person perspective to control the body.

Such feeling is somewhat similar to play first-person perspective flying games, therefore, FPV players in the game are all looking at the screen , a group of people take with a chair each one, and with a display screen set on the grass, the players will watch the screen to concentrate on operating the remote control, it is probably a major feature of the FPV game.

FPV kit

 

Currently FPV players mostly used their own DIY FPVs, in order to fly stable, fast and flexible, specific accessories include: FPV drones, remote control, Monitor, or glasses, FPV battery ,etc. But the cost is not as much high as imagine, single frame need about five thousand, and the cost of remote control and Monitor Level depends, about 20,000 you can play the game,but it’s not enough for these DIY Makers , camping chairs, sunshade ,and the like are also needed.

Advises For the New Aircraft Hobbyists

With a growing popularity of RC aircrafts, there are more and more new aircraft hobbyists coming out paying little attention to the safety awareness. There are advises listed below, hoping these advises would do any help to those new hobbyists who are lack of safety awareness. Every hobbyist should have their safety awareness（rc car batteries lipo）.

1. Try to study more knowledge about the flying and to know how it works, the more you know about the flying theories, your flying skills would improve faster and you could fly your aircraft smarter. Huge differences between the hobbyists who have played for a while lie in how much they know about the flying theories.

2. Paying attention to the aircraft no matter when it is flying or landing, stay alert, get prepared for any emergency situations. Don’t even rest easy when you are landing your aircraft, passersby may get hurt by the propellers.

3.Getting more flights or practices makes you a better hobbyist. You may not improve your flying skills for one flight only, but accumulated flights will enrich your flight experience and your understanding for your aircraft.

4.Never overlook the suggestions brought up by the experienced hobbyists when you’re taking a flight. Listen carefully and treat seriously, it would avoid you from some dangers or severe outcomes.

5. Fly your aircraft slower and steadier when you stop the flight for a long time. Focus on every landing and taking off.

6. Check every single device on your aircraft more regularly to ensure a more safety flight. If you feel any abnormal happening on your aircraft, try to land it safely and check at once in case of a flight crash. Besides, more discussions or analyses after every failure flight is necessary to avoid getting your aircraft broken.

7.Always being in a good mood when you are flying your aircraft. Never argue with other hobbyists for any little trifles. You would enjoy a good flight when being happy. You may also fly at your best when you’re in a good body condition. Get a good rest and ready to stop flying your craft when you feel exhausted, depressed or in bad mood. Knowing to control your mood and keep a good body condition will also help for a nice flight.

8. Take the 14.8v lipo battery out of the aircraft when there is no need a flight in case the craft takes off by accident.

Four things you need to know to start FPV racing

FPV drone racing has become a very popular activitiy recently worldwide.There are many asks about FPV drone racing. Here I will write a article about some things you need to know to start FPV drone racing.

Start Transmitting Video&Video Camera

There are pretty much options for frequency choice but the most popular one for newbies is 5.8Ghz. It easy to get start an have fun without getting into trouble. 5.8Ghz has many nice channels to choose and you can buy a lot of different FPV related items for this frequency.Most FPV cameras available today are primarily from the video surveillance & security industry and work very as well for FPV due to the small size and good low light capabilities.If you are afraid of soldering or getting your wiring well connected then you can buy a all in one unit. These are video cameras with built in FPV transmitters .

Some famous FPV cameres:RunCam 2 Full HD Camera,SONY CMQ1993X HD Camera,etc

Select Your Video Transmitter

There are a lot of video transmitters available on the market today each with its own frequency,antennas and etc.
You should know not more power is better ,too much power can interfere not only with your gear but your friends signal too if you are flying in with friends. I suggest you start with with 25 to 200mW video transmitter.

And you should know FPV video transmitters are not your 2.4Ghz RC transmitter. They can’t frequency hop. You need to set the video transmitter to a channel and make sure the video receiver are in the same channel. If anyone else if flying FPV you have to make sure you aren't on their channel!

A good antennas is very important

Your FPV system is only as good as your antennas. Most start using what comes with most video transmittersand receivers.a simple omni directional linear polarized whip antenna set which, depending on your frequency, can give very poor performance.

Practice&fly safely

When flying a FPV drone, the pilot sees from the aircraft's perspective, and even not need to look at the FPV drone. So the FPV aircraft can fly well beyond visual range, it’s only limited by the range of the remote control and video transmitter.

Where is it safe to fly FPV? I would hope that most people would agree it’s dangerous that flying over largely populated areas, busy highways, and other areas of high population density,especially for beginners,you should choose a sparsely populated areas.Parking garages and forests are also perfect venue?for drone racing enthusiasts.So first make sure you get a proper FPV and good place to fly,then take someone with you who’s experieced with FPV racing.Do not attempt to fly 2 miles away from yourself, with headtracking, in high winds, near sunset, on your very first FPV flight! That is of course an exaggeration. However, FPV flying is entirely different than line-of-sight flying. You get a completely different perspective, and during your first flights, it is very easy to become disoriented. it takes practice, practice, practice.

Suggestions

I used voltage alarms on my planes and on my goggles. Losing power is not good and neither is ruining a 14.8v lipo battery.Tattu 1300mah 75c 4s ,this is maybe the most popular battery for FPV racing recently.

I suggest you to learn from someone who’s experienced with flying FPV. It will make you learn faster, easier and have more fun.
Fly safely!!This is the first principle!
Have fun!

How should beginners begin FPV racing: DIY or buy a FPV Sets?

FPV drone racing has become a very popular activity recently worldwide.There are many asks about how and where to start FPV drone racing. Here I will write a article on how to start drone racing especially for beginners.
Basically there are two ways you can start FPV drone racing.

1.DIY:Build drones using parts you get at RC shops .
2.Buy a FPV Sets.

1)DIY:

One of fun parts of DIY FPV drones is that you can choose parts of your taste. Here I’ll try to build a FPV Quadcopter for example.

Step 1: Watch the video!

You can watch https://youtu.be/dXdIpJnSBI8

Step 2: What you need?

1.4 motors
2.4 ESC
3.1 RC transmitter and receiver
4.1 Flight controlle
5.1 Lipo battery Tattu 3s 1300mah lipo
6.250 Quadcopter frame
7.Wires
8.Assorted tools

Optional

1.Fpv Camera
2.Fpv transmitter and receiver

Step 3: Frame

Begin by roughly build you frame and attaching motors to the arms of the FPV Frame.
When you finished, the drones should be like the last picture.

Step 4: Solder on ESC

Install the motors to the esc's by soldering them.

Step 5: Programing Flight Controller

Now its time to program the flight controller

Flash the board , and make sure all the settings are correct.

Step 6: Wiring

This is where things might get confusing.
I have added a diagram that helped me when I made my quadcopter.Notice that two wires have been reversed. This switches the motors direction on the quadcopter in order to lift it into the air.

Step 7: Debugging and Testing

Now its time to test and debug the FPV Racing Drone.Using the assorted tools on clean flight, check everything is working

Most important:

1.Reciever
2.Motors
3.Mode

Step 8: Add battery

Now simply plug in your battery and let the flight controller calibrate itself for about a minute.
Battery recommend:Tattu 3s 75c 1300mah lipo

Some tips：

Fly in open fields
Use a FPV Battery Lipo alarm
Be careful

Thats it go and fly your quadcopter!
Here comes another option: Buy almost-ready-to-fly racing drones.

2)Buy professional FPV Sets

While there are pretty much FPV racing drones in the market, I would recommend two famous FPV racing drones.

A,ImmersionRC Vortex

Well-designed ARF racing drones which has two models: 285mm and 250mm sizes. 285mm-sized Vortex has a super light weight body which makes the quad fly quite fast. On the other hand, the 250mm-sized Vortex Pro released recently has more powerful motors with faster flight controller processing speed. Many teams used Vortex Pro at World Drone Prix Dubai, which shows that this quad meets professional requirements.

B,Team BlackSheep Vendetta

Well-known and new ARF racing drone. Clean-and-neatly design with no wires that are visible on Vendetta.

Other than the design, another defference from Vortex is its speed controller capacity that can go with as high as 6 cell batteries. As you are a beginner, you’d better not try batteries higher than 4 cells as these are too powerful for beginners. 3 cell lipo batteries is good for beginners.
Once you get these ARF racing drones, you just need FPV Lipo batteries-Tattu 3s 75c 1300mah lipo, goggles/monitor, controller and RC receiver to start drone racing. I will touch upon how to fly ARF drones in another article.

In conlusion, I would surely recommend FPV Sets to beginners who want to start drone racing immediately.It is really hard to build a quad successfully by yourself as you often end up in a situation where your quad won’t fly at all due to bad soldering, wiring or some other problems.And make sure you get enough batteries.For most FPVs,3s~4S ,1300~22000mAh LiPo battery would be great,like Tattu 3s 75c 1300mah lipo.

It is recommeded to DIY drones by yourself to gain basic knowledge of FPV Racing Drones, which will help you when you need to repair drones,this will save time and money.

Serial or Parallel connection for your RC models/Drones

Many of you want to increase your RC models/Drones speed or playing time ,and find a way to increase the voltage or capacity.Exactly,through connecting several cells in series,battery packs achieve the desired operating voltage.Each cell adds its voltage to the total terminal voltage.Parallel connection attains higher capacity and the same as current handling.Each cell adds to the ampere/hour (Mah) count.

Serial Connection

One battery’s positive connects the next battery’s negative and all connect like this.In this way,the voltage increases,but the capacity unchanged.That is to say, the total voltage is the sum of all series batteries voltage.

Connecting a pair of 1s, 3.7v, 5000Mah LiPo's in series:

This will increase the VOLTAGE x 2,but the capacity will remain the same for a result of 7.4v,5000Mah lipo battery.

RC models/Drones needing higher voltages,use battery packs with two or more cells connected in series.The advantage is that you can increase the speed of your RC models/Drones.But high speed for a long time will shorten the battery lifespan,so take care and operate in an appropriate speed.

Parallel Connection

One battery’s positive connect the next battery’s positive and negative connect negative,all connected like this.The voltage is unchanged,but the capacity increases,correspondingly,the current also increases.

If higher currents are needed and larger cells are not available or do not fit the design constraint, one or more cells can be connected in parallel. Most battery chemistries allow parallel configurations with little side effect.The voltage of the illustrated pack remains same, but the capacity increses,current handling and runtime increases too.

Connecting a pair of 1s, 3.7v,5000Mah LiPo's in Parallel:

This will increase the Mahx 2 but the voltage will remain the same for a result of 3.7v, 10000mAh.

Parallel is 3.7v,but you have to based on your RC models’/drones’ norminal power.The voltage is unchanged,but the current is big, after you’ve operated your RC models/drones for a long time,the excess current would shorten the lifespan of your 7.4v lipo battery.So it would do more harm.Please don’t parallel too many cells,keep the current under the norminal current,and you need to change the charger.

If you really want to play them for a longer time,and save you a lot of trouble,you can buy one new battery.The most important thing is that you don't have to change the charger because of the increasing capacity.

Either in serial or in parallel connection, the output power of the battery pack is increased. Parallel Connection is to increase using time,while Serial connection is to increase the speed.

RC lipo battery above discharge and also the good utilization of motive

Some rookies feel that lithium batteries brand improved,ever the greater the price,it is actually improved to work with the longer. But normally not the situation, even the best lithium batteries,over-discharge phenomenon will appear.

How to use the suitable of lithium battery?

Regardless of whether lipo battery 3.7v or 1.2v NiMH,won't suggest voltage once the battery is thoroughly charged.For 2200mah lipo battery, the common after total voltage reaches four.2v,I feel plenty of people have the mobile phone batteries universal charge,it output voltage is generally indicated above four.2v.NiMH full charge can attain 1.5v. Moreover to voltage,and after that there is certainly capability and discharge price.the capacity of your battery in mah,the discharge charge is an unit with C. In brief,1C for distinct capacity battery just isn't exactly the same. 1C discharge signifies that batteries can final for one hour. Illustration: 1500mah capacity battery lasted 1 hour of operate, the typical current is 1500ma, namely one.5A,one.5A and that that is if the battery 1C above the nominal greatest 10C the battery discharge latest is 15A... That is definitely under the battery 15A is harmless to use. Once more 1000mah capacity inside the 1C is 1000ma, namely 1A. When the over nominal 15C. Then the utmost discharge current is 1A * 15 = 15A, the utmost discharge recent of the battery is 15A. Having said that, the above get the job done the batteries 15A, 10C discharge is, in theory, the maximum recent operate employing 60/10 = six minutes . And 1000mah get the job done to 15A, 15C is discharged for the recent theory may be used to get the job done 60/15 = 4 minutes. So rather speaking, 1500mah, 10C battery to become used for a extended time factors. So invest in the battery by looking at the quantity of C just isn't acceptable. C compact variety of discharged battery may discharge a big quantity greater than C. Related with this particular capacity.

Remote manage model aircraft lithium battery termed the lithium polymer battery, typically referred to as lithium or lithium batteries. I've to 11.1V lithium battery remote manage model aircraft as an example to illustrate tips on how to correctly use lithium battery. Generally, 11.1V lithium battery of remote control model aircraft by 3 lithium batteries in series (3S1P), per piece batteries voltage is three.7V. The lithium model, cell phones, cameras, and so on. The nominal voltage is named marking voltage is obtained from your typical working voltage. The actual voltage monolithic lithium batteries is 2.75~4.2V, lithium within the topic of electrical power capacity of 4.2V to 2.75V discharge obtained. Remote handle model aircraft lithium batteries need to be made use of inside the voltage selection of two.75~4.2V. The remote management model aircraft lithium battery voltage is lower than 2.75V belongs excessive discharge, lithium expands, chemical liquids within crystallize, these crystals may pierce the internal framework with the layer caused by a short circuit, make the lithium voltage turns into zero. Remote control model aircraft lithium battery voltage is over 4.2V belong overcharging, inner chemical reactions also intense, lithium will blow expansion, if it continues to swell charge combustion. Whether or not it really is above discharge or overcharge can have remote manage model aircraft lithium batteries produce lots of injury.

1.the charge

1-1 Charging recent: the charging existing should not exceed the specs book stipulated highest charging recent (below usual circumstances is 0.five ~ 1.0C or much less), the use of larger than encouraged charging existing may well lead to the battery charge and discharge performance, mechanical effectiveness and protection performance difficulties and may bring about heat or leakage. At the moment marketed 5C model aircraft battery charging current, charging is just not advisable regular use 5C, so as to not affect battery lifestyle.


1-2 charging voltage: the charging voltage shall not exceed the restrict voltage (gens ace 2s lipo / single cell), four.25V charge voltage of every part of the highest limit. (Non-straight to enrich my understanding, this could result in overcharging the batteries, users use the battery because of an error produced by the consequences).


1-3 Charging temperature: The battery needs to be charged inside of product or service specs prescribed ambient temperature variety, otherwise the battery vulnerable to injury. Once they locate the battery surface temperature anomaly time (refer to your battery surface temperature exceeds 50°C), must straight away stop charging.


1-4 reverse charging: Connect the battery constructive and unfavorable, non-reverse charging. In case the constructive and unfavorable reversed, we'll not have the ability to charge the battery. Reverse charging the battery are going to be destroyed, and even cause fever, leak, fire.

2.discharge

2-1 Discharge current: discharge present may not exceed specifications specified greatest discharge latest, high-current discharge capability will cause the sharp decline inside the battery to overheat and cause swelling.

2-2 Discharge temperature: The battery has to be discharged inside of specs specified working temperature assortment. Once the battery surface temperature exceeds 70??C, to suspend use until finally the battery is cooled to room temperature thus far.

2-3 over-discharge: over-discharge can harm the battery cannot be so single battery discharge voltage is reduced than 3.6V.

3. Storage

The battery should be positioned in awesome storage environment, long-term storage battery (a lot more than 3 months), it is actually advisable at a temperature of 10-25°C and a minimal temperature non-corrosive fuel environments. In the long-term storage battery each 3 months to sustain the battery charge and discharge activity and make sure that every cell voltage 2s lipo battery 5000mah inside the range of 3.7~3.9V.

How to charge of NiMH rechargeable batteries right

With the rapid development of digital industry,NiMH batteries with the advantage of its benefits,environmental protection is more and more get the favor player and bulk purchases.use also from traditional small household appliances product: lamps,clocks,electric toothbrushes,etc and other widely used to our new products,such as digital camera,electric toys,RC and others.

As people is constantly increasing,the number of NiMH batteries using and maintenance of science is gradually taken seriously by people,As we all know,the brand the service life of NiMH batteries according to the official claimed that can charge up to 1000 times,actually this is an ideal value,often less than this life. But as long as reasonable use charger,more in-depth understanding of NiMH batteries,we will still be able to let her prolong life. Tattu(lipo battery 5000mah) warm prompt the following tips:

Under normal circumstances,the new NiMH batteries contain only a small amount of electricity,when you buy to recharged and then use.But if the battery factory relatively time is shorter,power is adequate,recommended use before recharging.

1.A new NiMH battery generally after 3-4 times of charging and use,in order to play to the best performance.

2.This is very important:although NiMH batteries memory effect is small,still recommend recharging after each use as far possible,and with a full-time,not a charge in a while and then filling in a minute. 

3.When the battery is charging, the charge should pay attention to the heat around the charge,Don’t put to much stuff around,keep the battery clean.This is to avoid the problem such as power loss,keep the contact point at the ends of the battery and battery cover interior clean. 

4.Long time no use it ,remember to remove the batteries from the battery compartment ,put in dry environment recommended in the card battery box,to avoid short circuit. 

5.The NiMH batteries not use in long time can deposit in a few months later, nature into a state of ”dormancy”?batteries,the battery life is reduced greatly. If the NiMH batteries(3s 2200mah lipo) have been placed for a long time ,it is recommended to use the slow charge for charging. 

A Revolution in RC Battery Technology

The revolution motors was accompanied by a revolution in battery technology. The energy density of modern lithium-polymer (LiPo) batteryies, combined with the amount of power they can provide at very cheap prices, has opened the door to a new class of aircraft. With this comes a warning: Lipo batteries can catch fire in very dynamic ways from charging, physical damage, or a change in the wind. A great idea is to have a collection of clay flowerpots in which to store and charge batteries. Don't let the batteries get hotter than 120 degrees Fahrenheit or freeze.

A common way to destory a battery is to leave it plugged in to the speed control when the plane is not being flown. If the battery is discharged too deeply. It will destroy the battery.

At the Brooklyn Aerodrome, we have settled on the 1800-milliamperehour (mAh) or 1.8-amperehour two-cell battery pack because such battery packs are cheap and are around the correct weight to balance the Flack. For the more creative aircraft, such as the Bat, we double up battery packs for nose weight and will add lead tire weights if needed. It is easier to have a standard size and work around it than to have varying capacities that inevitably will have you at the flying venue with the wrong-sized battery pack. The other considerations around batteries are the speed-control connector and the balancing connector.

Recommend LiPo Battery pack

Genstattu.com has the least-expensive battery packs historically, and they perform okay. I use very high-quality Thunderpower packs that have not puffed out despite being five years old, but that is the difference between an $8 to $9 battery and a $30 battery. I suggest going cheap with low expectations. Lots of brands are available, but try to buy from a U.S. warehouse to minimize shipping costs and transit time.

3S Gens Ace 5000mAh

Currently, I use the Gens Ace Gens Ace 3s lipo 1800mAh 20C (U.S warehouse) at $8 to $9. This battery lasts about one to two years if treated well and has shown itself to be crash-tolerant. It has a JST-XH connector for charging and a male XT60 connector for powering the airplane. Be mindful of these connectors when buying chargers, and you will have to buy and solder a male XT60 connector onto your speed control.

Alternative Batter Packs

Any two-cell LiPo pack with a 20C or greater rating will do. BP Hobbies offers the Cheetah Packs 7.4V lipo battery 5000mah 35c LiPo battery at $16 with JST-XH connectors for charging and Cheetah 4.0-mm controller connectors.

Be aware that lithium-iron-polymer (LifePo) and lithium-iron (LiFe) batteries are now being sold that look very much like LiPo batteries but differ in a few ways. They have a lower voltage (6.6 volts versus 7.4 volts for LiPo), so if you go with these, be sure to go on ghe higher end of kilovolt ratings for the motor - 1800 kilovolts is about right - and consider using a 10-inch prop where I have been recommending a 9-inch prop. These batteries also will require a charger that is designed for them. A major advantage of LiFePo batteries is that they are less likely to catch fire.