How to extend battery life and why use frequently can keep the battery best performance?

If the traditional Ni battery is charged for too long, the liquid inside would crystallize. In the way, to maximize the performance, the full charge and discharge are required. However, for the 2 cell Lipo battery, we can charge it whenever we are convenient.

It is a false about the lifespan of lipo battery that we should replace the lipo battery after charged for 300-500 times.

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

A charging cycle refers to the period from full power to the completely empty power and then fully charged. That does not mean charging for one time, as the following picture shows.

According to the picture, the battery is charged for 20% after the first time 40%. Then, after consumed some power, it is charged by 30% and 20% separately. In the half of this 20% (at the time of 10%), a charging cycle has been finished. And then, the next cycle begins.

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 RC 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 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/how-to-extend-battery-life-and-why-use-frequently-can-keep-the-battery-best-performance/

Why my drone simple to crash?

As the drone more into people's lives, the crashing drone inevitably come to be to a scorching topic, since for being truthful, frying a machine is as well uncomplicated,while the worst knowledge a drone pilot can face is crashing or shedding your drone through flight. Plenty of new classmate don't have very good instruction, or lack of corresponding processing experience, they normally crashed of ignorance, the causes are various.the reason may be divided into two broad categories:

Prior to flight:

No calibration of GPS and also the compass;
No number of stars on GPS, weak star flight;
Didn't tighten the screw. Propeller should verify once again;
Didn't verify the electric amount of 22.2v Lipo battery. Many people will put together numerous batteries, at times,but they did not press the button to view if the energy enough once they very first fly;
Unfamiliar with the remote control , do not even know when they accidentally set to Japan's hand.

Throughout flight:

Bump a tree, developing, hit anything at all;

Lack of control skill bring about the disorder direction right after the drone fly over-the-horizon;

With the interference spot in the course of flight;

Ignored the sudden wind or windy weather;

From brake management bring about drone roll fell.
To assist you avoid this predicament, we're going to explain the biggest dangers to you and everything you can do to prevent them.

Know Your Drone Piloting Abilities

The biggest danger for your drone is oneself, in particular should you're a brand new pilot or doing work with unfamiliar products. The odds are if some thing goes incorrect throughout your flight, you triggered the issue!
Start out out lower and slow. We all know the best joys of flying a drone can come from soaring around higher up inside the sky, maybe even capturing some killer video, but you have to learn while flying 15-30 feet off the ground just before taking it any higher. For the duration of a worst-case scenario (heading to get a tree/building, operating from battery, losing handle, etc.) you have to get your drone back to the ground ASAP.
Treat New Equipment being a New Drone. If you include new equipment to your drone (like attaching a new camera on your Phantom), treat your flight as though it's a totally new drone you might want to master. Matters like dealing with and RC Lipo battery life might be impacted and could bring about some poor outcomes in case you treat it as though absolutely nothing has modified.

Steer clear of Obstacles

This goes along with flying inside of your limits, but one of the most typical causes of crashes are attributable to flying your drone into objects like trees and buildings. It's also one of the simplest methods to drop your drone acquiring it caught with the top of the 60 foot tree, or on leading of a building you don't have entry to (plus the owners may well not be so great).

Start off out by flying in an open field, away from any trees, buildings, bodies of water, or roadways. This is actually the safest method to make certain your drone comes dwelling with you.

Weather Can Kill Your Drone

An additional important threat for your drone is weather itself. Thankfully, it's very easy to prevent in case you just place within a little time researching climate reviews ahead of hand.
Check the climate report prior to you fly If there's a chance of rain, conserve your flying for a different day! Superior to get protected than have your drone come crashing to the earth resulting from technical malfunctions from having moist.
Know the wind gusts. Make sure you check out the current wind ailments on the weather app in advance of take-off. Most novice pilots can manage wind speeds of 5-10 MPH with out a lot problem. In case you see wind speeds at 15 MPH or over, you must reconsider flying near any obstacles or with a lot of altitude. You might uncover your drone caught in the wind gust that didn't exist at reduce altitudes, and it could carry your drone away or capsize it.

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/

The basic knowledge of Lipo battery

For example: a 3s 11.1v 25c 2200mah lipo battery
3s：three cells in series
11.1V：3.7*3=11.1V
2200mah：the capacity of the battery
25c：the discharge rate

About voltage

3.7V voltage does not mean that when the battery is fully charged, for lithium-ion battery, the general voltage after full voltage reaches 4.2V,so 4.2*3=12.6V for a 3S battery.

Actually,the real voltage of a cell is 2.75~4.2V.the capacity signed on a battery is how much we got when the battery discharges from 4.2V to 2.75V.So all the remote control model aircraft with lithium-ion battery also must be used within the voltage range of 2.75 ~ 4.2V.Once the lithium-ion battery voltage in remote control model aircraft is lower than 3.7V,we called it over discharging(the damage for battery is fatal),It will cause puff phenomenon,chemical liquid inside will has crystalline polamer,and the crystal may penetrate the inner structural layer caused by a short circuit,will also greatly reduce the battery capacity and discharge rate, so that the battery use value greatly reduced.So good habits is the only way to increase battery life!When the lithium-ion battery voltage in remote control model aircraft is higher than 4.2V,we called it over charging.That will cause intense internal chemical reactions.It easily be exploded if you continue to charge the battery.So no matter overcharge and over-discharge of lithium batteries will have a devastating injury.Therefore, we recommend using the safety standards of regular charger to charge the battery while the charger is prohibited unauthorized alterations, which may result in very serious consequences!

About capacity and discharge rate “C”

Battery capacity to mah (mAh) as a unit, discharge rate in units of C.Regarding “C”,for example,1C means with 1C discharge rate,the battery can last work for one hour.

All in all, the smaller of the discharge rate, the longer the battery discharge time.So when you buy a battery,you cannot just check the discharge rate.A small discharge rate battery also may have large discharging than a large rate battery.Because it is also associated with the battery capacity.It means that a bigger discharge rate have a stronger life vitality.The battery in a small discharge rate will be scrapped a few times.

About charging

A.the charging current:charging current is generally located between 0.5-1c.Recommended not to exceed 1 c(it is C not A)

B.the charging voltage:charging voltage shall not exceed the limit voltage (4.20V / single cell).The maximum limit charging voltage is 4.25V for each cell. (Prohibited the use of straight recharge your battery,otherwise may cause overcharge the cells.Users undertake all the consequences due to an error using battery.)

C.temperature of charging:The battery must be charged in prescribed ambient temperature range of product specifications , otherwise the battery vulnerable to damage.
When find the battery surface temperature anomaly (refer to the battery surface temperature exceeds 50 ℃), you should immediately stop charging.

About discharging

A.discharging current:the discharge current must not exceed a predetermined maximum discharge current.Large current discharge capacity will lead to the sharp decline in the battery and cause overheat and swelling.

B.discharging temperature:the battery must be discharged within specifications specified operating temperature range.When the battery surface temperature exceeds 60 ℃, it should suspend use until the battery is cooled to room temperature.

C.over discharging:over discharging the battery will cause devastating damage, so the discharge can not make the best single battery voltage is lower than 3.7V(lipo 3s voltage).

About stock

The battery should be placed in cool storage environment, long-term storage battery (more than 3 months), it is recommended at a temperature of 10-25 ℃ and low temperature non-corrosive gas environments.In the long-term storage,every 3 months ,battery should be charged and discharged for maintaining its activity, and to ensure that the voltage across each cell within the range of 3.85V.

About Newbies Getting Started with Fly Device

Now it’s very common to see many people like remote control aircraft , and there are more and more newbies start with it.So I'd like to give some ideas and suggestions on flight equipment to you, hope it can do some help.

About the budget

When many people talk about remote control aircraft, they talk about" how far it can fly, how high it can fly, and how much of it......” About these questions, I think how much you could spend on an RC aircraft depends on your economic situation:

In the case of without abundant money, it is recommended that you can DIY an aircraft yourself, and DJI is the best choice for beginners. For example, I can fly with APM open source control system to the average effect of the DJI control system,but it requires strong handling ability and secondary development of software ability. If you think it’s too troublesome, you can choose commercial finished-product flight control system. If you want to be engaged in commercial fly tasks, then the first thing to consider is the reliability when selecting the aircraft, and prices is the second thing.

In the context of current price of the aircraft, if you want to play in entertainment level, then you need to prepare at least ￥5000-5000. Don't just look at the price of the aircraft, but pay attention to its incidental consumption, such as batteries, etc.

About Choice of Aircraft

First of all,you need to make it clear that fly as a hobbyist or fly for commercial use? If you just fly for entertainment, there are many choices for you. If it is commercial, then the vital point is the reliability of your aircraft.

Compared to helicopter, multirotor is just easier for starting, as for whether you can fly good or not depends on your own.And reliability, there is no 100% completely reliable device, at this point, you need to fly frequently to improve your own skill, maintenance the device regularly, which can effectively minimize the accident probability.

For what multirotor aircraft you should choose, if you are a hobbyist, I suggest to choose quadcopter, it can fly flexibly, take photos and video, it’s good for fun.If you want to make commercial aircraft photography, then you can decide to choose the devide by what camera you will use and the take-off weight.

About Choice of Remote Control Device

A reliable remote control device is one of the guarantees of your safe flight. You can choose the world's three largest remote control device:Futaba, JR and Sanwa, and these non-mainstream remote control devices Hitec, Graupner are also very reliable.

About Battery and Charger

Now it’s the era of lithium battery, so we don’t talk about the related knowledge about Nicd and NiMH battery at present. Lithium battery is generic terms, the common lithium battery including Lilon battery, LiPo battery 11.1v 2200mah and LiFe batteries.

It’s very common to see LiPo and LiFe battery in the remote control model. For example, the most popular electric cars-TESLA,equipped with more than 7000 pieces 18650 encapsulated Lilon battery. Our aviation model use LiPo batteries most, which has 4 basic parameters:the battery voltage & how many cells, battery capacity, continuous discharge ratio, and charging ratio.

The battery voltage general use "V" as the basic unit, a single LiPo battery’s voltage is 3.7 V, if it is in series connection, then the total voltage of battery pack=single cell’s voltage * series connection cells amount.The series connection cells use”S” as basic unit,for example:6S means 6 cells in series connection,so total 22.2V.

Battery capacity general use"mAh" as the basic unit, a larger capacity battery,its discharge time will correspondingly increase, but volume and weight also increases.

Continuous discharge ratio is used to describe the maximum discharge capacity of a battery, generally use”C” as the basic unit, then the maximum discharge current, the maximum discharge ratio is related with the battery capacity.The calculate method is: discharge current (A) = battery ratio C X [battery capacity (mAh) / 1000 ], such as a piece of battery’s capacity is 5000 mAh, continuous discharge ratio is 45 C, then the battery maximum discharge current is 225 A.

Somebody said: "A device with 25 C batteries can be normal used, but it will burn the ESC when use 35 C batteries", this statement is wrong. The system total current depends on the overall system load and fixed consumption, so it has nothing to do with the battery, the battery parameters only describes the discharge capacity of a battery, but not to say that once you connect the battery, then the battery’s maximum current start output. Therefore, choose a battery depends on the the whole system’s requirement, and match the parameters according to the system’s requirement.

On the market, the battery quality and price is various, here I would recommend our hobbyists choose battery with big brands and high reliable like Gens ace 2s lipo, Hyperion and so on. For myself, I use Gens ace & Tattu batteries, who with high performance, excellent quality and terrific after-service. They are worthy of recommendation,more about batteries:http://www.genstattu.com .

Above are the choose of fly device I recommend, I wish you have a good time.

NIMH or Li-Po Battery for My RC Car

Many new RC car beginners get confused about what kind of batteries they should choose for their RC car NIMH or Ni-Po battery? What are the differences between them? As you may hear some questions like “ What kind of RC car batteries should I buy? “ “Can I use LIPO battery for my RC car?”“What are the differences between 6s 7.2v NIMH battery and 2s 7.4v Lipo battery?” So let’s take these batteries as an example and make a comparison between them in several ways.


NIMH, Nickel Metal Hydride, serves as a replacement for NiCd as it has only mild toxic metals and provides higher specific energy.

LIPO, lithium polymer battery, is a rechargeable battery of lithium-ion technology in a pouch format.

Let’s compare these batteries in the following aspects:

Price:

NiMH:It is cheaper than the Lipo battery. You may find the price of an 7.4V Lipo battery could afford two 7.2V NiMH batteries for your rc car.

Lipo: It is more expensive, but as the production scale of Lipo battery gets bigger, the production cost will get lower and lower and so as the price.

Voltage

NiMH: It’s nominal voltage is 1.2v per cell. As we can see from the picture, the common voltages for NiMH battery are 6v, 7.2v, 12v, 14.4v.
Lipo: It’s nominal voltage is 3.7v per cell. So we usually find Lipo batteries in 7.4V, 11.1V, 14.8V, 18.5V, 22.2V.

Weight/size

NiMH: 7.2v NiMH batteries are heavier than 7.4V Lipo batteries for the same capacity. And it’s bigger than the Lipo one.
Lipo: Lighter and smaller than the NiMH one, this makes a great difference for rc cars . That’s why Lipo batteries are getting more and more popular in the RC cars.

Memory effect

NIMH: It has the memory effect. It is commonly believed that when rechargeable batteries are not fully discharged between charge cycles that they remember the shortened cycle and are thus reduced in capacity. Which is also called “voltage depression”.

Lipo: Do not have the memory effect. So the full capacity of the Lipo will always larger than the NIMH one after being used for weeks.

Charge and discharge:

NIMH: It is not that dangerous if it is over discharged or over charged. But over charging or over-discharging will shorten the life span of the NiMH batteries.

Lipo: Can never be over discharged or over charged. Or it will damage the battery, explode, or even get your rc car on fire.

Battery charger

NIMH&Lipo: You have to choose the correct battery chargers for them or use charger that can both charge NiMH and Lipo batteries.

Power&Capacity

NIMH:A nimh battery has a consistently less power as you run it down.

Lipo: Lipo batteries will provide longer and quality run time for its larger capacity and C rates.
To make a conclusion, lipo batteries are better choice for RC cars.

What are the precautions for li-po battery?

According to the electrolyte materials that are used in Lithium Ion Batteries,Lithium Ion batteries are divided into Liquified lithium-Ion battery (abbreviation:LIB) and Polymer Lithium-Ion Batter (abbreviation:PLB) ,It used in the PLB cathode materials and LIB is the same, the anode materials are divided into cobalt acid lithium, manganese acid lithium, ternary material and lithium iron phosphate material, negative extremely graphite, working principle of the battery is almost the same.Their main difference is that the different electrolytes, LIB using liquid electrolyte, PLB with solid polymer electrolyte as a substitute for, at present most of the polymer gel electrolyte.

1.classification

solid

Solid polymer electrolyte of lithium ion battery electrolyte for the polymer with a mixture of salt, the battery the ionic conductivity at room temperature is low, can be used at room temperature.

gel

Gel polymer electrolyte for lithium ion batteries is in solid polymer electrolyte adding plasticizer and other additives, thus improve the ionic conductivity, the battery can be used at room temperature.

polymer

Polymer lithium ion battery having a thin shape, and of any area of any shape, etc., so you can use plastic composite film manufacturing the battery case, which can improve the ratio of the entire battery capacity; polymer lithium ion battery can also be high molecule as cathode material, its quality will be improved by more than 20 percent more energy than the current liquid 2200mah lipo battery.

2.Do not charge overcharge

Polymer lithium-ion battery, if the charging time is too long, will increase the possibility of expansion.

3. Advantages and disadvantages Advantage

A. single battery voltage up to 3.6v ~ 3.8v 1.2V voltage is much higher than the nickel-metal hydride and nickel cadmium batteries.

B. capacity density, and its capacity is 1.5 to 2.5 times the density of nickel-metal hydride batteries or nickel-cadmium batteries, or higher.

C. Self-discharge, place a long time after the loss of its capacity is small.

D. Long life, the normal use of the cycle life can reach more than 500 times.

E. no memory effect, before charging is not necessary to vent the remaining capacity, easy to use.

F. Good safety performance

Polymer lithium aluminum flexible packaging structure adopted in the event of safety problems occur, polymer batteries will not explode, it will only drums.

4. small thickness, can do thinner

Slim, the battery can be assembled into the credit card. Ordinary liquid lithium using the first custom shell, after the Cypriot village of positive and negative material method, the thickness of 3.6mm or less technical bottlenecks do exist, and the thickness of the polymer batteries can be done 1mm or less.

5. Light weight

Using a polymer electrolyte battery without metal shell as protection packaging.5000mah lipo 2s battery weight compared with the same capacities of steel lithium, 40% lighter, 20% lighter than aluminum battery.

6. The internal resistance

Polymer batteries internal resistance than ordinary liquid small core, the current domestic polymer batteries internal resistance of 35mΩ can do even less, greatly reducing the battery from the power to extend the standby time, can be achieved with the international level. This support large discharge current lithium polymer is ideal for remote control model as the most promising alternative to nickel-hydrogen battery products.

7. The shape can be customized

Manufacturers need not be limited to standard form, it can be economically made of appropriate size. Polymer battery can be added according to customer demand or reduce the thickness of the batteries, the development of new models of batteries, cheap, mold cycle is short, and some can even be tailored according to the shape of a mobile phone to take advantage of the battery housing space, improve battery capacity.

8. Excellent discharge characteristics

Polymer battery with gel electrolyte, compared to liquid electrolyte, gel electrolyte having a stable discharge characteristics and higher discharge platform.

9. Plate Design Simple

As a result of polymer materials, batteries no fire, no explosion, batteries itself has adequate security, thus protecting the circuit design polymer battery can be considered omitted PTC and fuse, thereby saving the cost of the FPV battery.

Ways to eradicate the battery memory impact

What's the battery memory result?

If the battery is nickel cadmium battery, long-term will not be complete charge and discharge,it easy to leave a mark within the battery, the battery capability, this phenomenon is called battery memory effect.That mean, it appears that battery memory consumer daily charge and discharge charge as well as mode, time is tough to modify this kind of mode, can no longer do significantly charging or discharging.Lithium-ion batteries, no such result.

The reason behind the battery memory result

Resulting from adverse really sintering form in the traditional system, cadmium coarser grains, if nickel cadmium battery recharge in advance of they may be totally discharge, cadmium grain effortlessly gathered into pieces and produce a 2s 7.4v lipo battery discharge kind secondary discharge platform.

Battery will retailer the discharge platform and it since the finish from the discharge within the subsequent cycle, despite the fact that the capability of the battery itself could be make the battery discharge to your decrease platform.During the procedure of following the discharge of battery will only do not forget that lower capability.Exactly the same in each use, any incomplete discharge will deepen this effect, make the capability with the battery is reduced.

The best way to do away with the battery memory result?

To remove the effect, there are two techniques, 1 will be to use tiny latest depth of discharge (including with 0.one C to 0 v) 1 is to use big latest charge and discharge (e.g., one C) several times.

In practice, the method of elimination of memory results have strict specs and an operating method. Improper operation will be counterproductive.

For nickel cadmium battery, the upkeep of usual is deep discharge on the standard basis: the common use to get a month (or thirty instances circulation) on the deep discharge (discharge to 1.0 V/each section, named the work out), popular use is usually to use photovoltaic cells or make use of the signifies which include shutdown can lower the formation of the memory effect, but this is not training, since the instrument (including cell phone) is not employed 1.0 V/only to flip it off everyday, has to be special gear or line to finish the do the job, but luckily a lot of nickel cadmium battery charger with this particular perform.

For no nickel cadmium 7.4v lipo battery to training for any extended time, as the cumulative memory impact, cannot reply in training capacity, you then will ought to deeper discharge (termed a recondition), this is often an incredibly small present to get a long time for every area to 0.4 V battery discharge of the procedure, want specialist equipment.

For nickel metal hydride batteries, exercise within the frequency of about as soon as each three months can properly alleviate the memory result. Since the cycle daily life of nimh battery is lower than that of nickel cadmium battery, with little recondition this strategy.

Suggestion one: each and every time there is no really need to charge the 14.8v lipo battery just before discharge, and it really is hazardous, for the reason that useless shorten the lifestyle with the battery.

Suggestion two: use a resistor connect would be the cathode with the battery discharge is just not desirable, cannot management recent, easy to 0 v, even result in series of battery cell polarity reversal

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. 

Protect the environment starts from recycling batteries

Batteries has been deep into every corner of our lives,for usage of the battery has been growing,mobile phone battery,car battery,FPV battery and the other electric toy is inseparable from it.

1.why to recycle used battery?

1st:Used batteries are of great harm to our living environment.

Scientific research shows that section 1 battery-14.8v lipo battery rot in the field,can lost 1 square meters of soil permanent utilization value;A grain of button batteries can make 600 tons of water has been polluted,the equivalent of one people’s life’s water consumption.

2nd:Used battery is potential threat to human health.

In the biggest threat to the natural environment,several substance in the battery contains a variety of materials such as mercury,lead,cadmium etc.,if will live with rubbish landfill waste battery,or discarded,will permeate the soil,pollution of groundwater,and in turn destroy the human survival environment,indirect threat to human heath.

2.how to recycle used battery?

We should pay more attention to about the danger of waste battery,for how to reduce the harm,people carry out a lot of good ways,for example,in setting the battery garbage classification and recycling bins in our lives,for some battery production units and market to reward people for recycling batteries 7.4v lipo battery,etc.Waste battery recycling is an integrated process, it produces pollution nots allow to ignore, from recycling to deal with interlocking, supplement each other.Want to improve the quality of waste battery recycling, we must pay special attention to each link, forming a virtuous cycle, proper set of battery recycling on the regular way.
The government should also attach great importance to, recycling and disposal of waste batteries will issue really on the agenda, the perfect legal laws and regulations, and establishing social recycling service system, promote the formation of the recovery and recycling of waste battery industrialization, achieve reduction and recycling of waste batteries and harmless, it may cause harm to the environment to a minimum.

3.conclusion

Everyone needs to help protect the environment,and each of us should actively cooperate with,don’t throw waste batteries.

Battery-The modern life necessity

An electric?battery?is an energy conversion and storage devices?that convert stored chemical energy into electrical energy.?

With the fast developed science and technology, improvement of human living standards, more and more variety of new features, high-tech electronic products are widely used to humans.Correspondingly,it will promote the arising of all kinds of different appearance and performance batteries.

The big brand such as Nanfu battery,GP battery,Panasonic and so on are known by people.Another 2 big brands have attracted worldwide attention with their excellent quality,innovative style and performance-Grepow and ATL.

Shenzhen Grepow Battery Co.,Ltd is a professional R&D,design,manufacture and selling company.From the establishing year 1998,Grepow has changed greatly in its development.
Grepow manufactured and supplied Ni-Mh battery from 1998 in a large quantity with its stable quality,reasonable price and perfect service.It is a kind of no-pollution,no cadmium new green energy battery widely used in areas like civil life,cars,toys, telecommunication and so on. We recommend NiMH for applications where a device has already been designed to use AA type batteries.

This batteries,?however,?have a short?lifespan,heavy,low discharge rate,and low voltage characteristics,so Grepow update to manufacture 2200ml Li-po battery from about 2009.

With a professional R&D team,and extensive experience in manufacturing battery, excellent technical documentation and advanced processing management system,Grepow’s 2 big brand Li-po battery-Gens Ace and Tattu are greatly known and used in RC ans UAV.which ensures battery’s consistency and stability in mass production.

Gens Ace batteries are very useful for embedded electronics. They offer the highest density readily available on the market. Because cell phones predominantly use this battery type, they are easy to find for reasonable prices. They?do?require special charging, so be sure to use the right charger for the job.

Gens Ace LiPo batteries cell has a?nominal voltage of 3.7V. When fully charged you will see nearly 4.2V on the cell but it will quickly drop to 3.7V under normal use. When depleted, the cell will be around 3V. This means your project will need to handle various voltages if you are running directly from a cell. If you need 5V you will need to combine two LiPos in series to create a 7.4V pack（2s 7.4v lipo battery） and regulate down to 5V.

We recommend Gens Ace LiPo for nearly every portable application like helicopter,RC,jump starter and so on.They are fairly robust and when used safely provide a great power source.
DJI-the world market leader in easy-to-fly drones and aerial photography systems,adopts Grepow’s Tattu battery to control its famous UAV.With the advantage of professional R&D, humanized?service,mass production capacity,amzing explosive power,Tattu is widely used by other big brand GoPro,Panasonic,LG and so on.

In the future,Grepow’s Tattu will be used in more fields and Grepow will pay attention and be allergic to more potential development trend and supply better bettery or other amzing products to the world.

Sizing Your Battery Pack

LiPo batteries were more expensive than Li-Ion because they are more labor intensive to manufacture. Fortunately prices have dropped substantially since they have become as, if not more popular than Li-Ion battery technology. This holds especially true for electric powered RC aircraft and the real driver behind LiPo battery research – portable communication/entertainment devices.  Now the best RC battery brand is Gens ace lipo, many RC hobbist use Gens Ace Lipo batteries.

1. Average Amp Draw

To work out the value for average amp draw, you’ll need to know the all up weight (AUW) of your drone and relate this to thrust and amp values found in the datasheet for your motor/prop configuration. The idea is to work out how many amps your multirotor will draw to maintain a stable hover (note we are taking a stable hover to represent average flight). For example, if your quadcopter has an AUW of 2kg, each motor will have to produce 500g of thrust in order to hover. If each motor draws 4amps to produce 500g of thrust, then your average current draw will be 16amps.

Please notice that current draw depends on your way of flying and external factors such as resistance, weight and wind. Preferably, always use a LiPo low battery warner on your RC device. This will warn you when the battery is drained before it's fully empty (20%). Don't push the LiPo. They don't like to get discharged to the bottom. And you won't like your multicopter falling down from the sky suddenly either.

2.  Daily energy use

Next find the energy used in a day. Figure out how long each electronic device will be run in hours during a day. Multiply the wattage of each device by its run-time to get the energy in watt-hours per day. Add up all the watt-hour values to get a total for your home. This estimate is likely too low as there will be efficiency loses. To get a very rough idea of the real value with system loses, multiply by 1.5. This will help account for decreasing performance when temperature increases.

3.  Days of autonomy

Now decide how many days worth of energy you want to store in your battery bank. Generally this is anywhere from two to five.

4.  Battery bank capacity

Finally we can calculate the minimum battery AH capacity. Take the watt-hours per day and multiply them by the number you decided upon in 3. This should represent a 50% depth of discharge on your batteries. Therefore multiply by 2 and convert the kwh result into amp hours (AH). This is done by dividing by the battery voltage.

Example calculation of max. flying time:

Gens Ace Battery from Genstattu.com

A constant current draw of 20A from a 2200mAh LiPo will get you:( 2200mAh /1000) / 20A = 0.11 x 60 = 6.6 minutes flying time.

Discharge: LiPo batteries can be permanently damaged if they are fully discharged. In respect of this, it's common practice to not discharge your LiPo batteries below 20% mAh during flight; this is known as the '80% rule'. To represent this in the flight time calculator enter the value 80% in the discharge field.

Here a example for you

If your airplane requires a 3S setup using a typical 3s 2200mah lipo pack and you change to a “hotter”motor—meaning one that is more powerful and will pull more current—you need to see if your current packs can handle it. If your current power system is pulling 20 amps with your 2,200 mAh 15C pack, but your next motor upgrade will pull 35 amps, that pack won’t be happy.

Almost every RC LiPo battery cell is packaged in a foil pouch coincidentally called a pouch cell. The picture to the right shows a typical 2 cell LiPo RC battery pack.

It is best to size your battery packs so they run somewhat below theirm maximum C rating. You will stress them less and they will last longer. For example, if your motor needs a pack that can deliver 10 amps, getting a 1000mah pack that is rated for 10C ( 10 amps ) will meet the spec, but it is running at its limit. A 15 C rated 1000 mah pack would be better, or perhaps a 1300 mah 10 C pack. In either of these cases, the pack will be less stressed and should handle the load much better over the long term.

I recommend buying a quality LiPo pack that is well beyond the projected requirements of the setup. Running a pack at its limit will guarantee a short life and wasted money. Pay attention to the label and notice if it gives two ratings such as 30C/60C. These represent the continuous and burst ratings as previously mentioned.

Does cold weather affect a lipo's performance

LiPo batteries are also known as lithium-ion polymer batteries. These kind of batteries are rechargeable or secondary cell batteries. They are commonly utilized in phones, but can also be used in radio-controlled planes and other smaller electronics. These batteries may also be used someday to power electric cars.



Cold weather affects lipos, like other batteries, you will probably capacity to be down, and therefore duration to be down. If your model is set up to direct cooling air over the lipos in the summer then it'll supercool them in the winter time, unless you make a change. What I do is to put aluminium tape over the inlet ducts that are there to provide that cooling air.

The Lipos themselves sit in a Liposack, with a number of chemical handwarmers to keep the worst of the chill off. One of those will give about 30 minutes of decent heat and so four of them last about as long as I want to be out in the very low temperatures. On returning home the crystallised chemical handwarmers are warmed up in a pan of boiling water up and they then revert to their liquid state for the next time .

There is a way to get more performance out of a LiPo battery; optimize the Starting Temperature. LiPo batteries have an "ideal output temperature". The internal resistance is at its lowest when they're ran with a starting temperature of around 100°F (38°C). A pack at a temperature of less than 50°F (10°C) (very cold pack) can show noticeably poorer performance until it warms up with use. In the winter time or in cold climates, it's best to store packs in a heated indoor living space. For outdoor use in cold climates, you should pre-warm your packs to 90-100°F (32-38°C) before using them. But remember, 140°F (60°C) is the maximum safe temperature, and the pack's temperature will increase when it's used, so be careful not to pre-warm the pack up too much.

Tips for your Lipo batteries

There are a couple effective ways to do this. The most effective is to find a square heating pad that you can place in your battery bag at the bottom. The only issue here is you will need a power source, not always a choice when out on location.

The second method is the method I've used when I don't have access to the generator or another plug in. These tire heaters work perfect to plug into a small 7.4v 2200mah lipo battery and keep the batteries warm. Simply place your batteries on top of each element and choose a heat that won?ˉt melt the plastic. Also don't forget to keep an alarm on the Lipo batteries

Disclaimer: you must make sure to attach the sensor to one of the pads so they don't run on full power not stop. To do this, just poke two small holes through one of the pads and zip tie the sensor to it so it's secure.This will help keep your batteries warm while out in weather normally too cold for Lipo batteries.

Best RC Lipo Battery for cold weather

 

Now available from Genstattu, a collection of high capacity, high drain, gens ace lipo specially designed for use in RC cars and models where extreme power and rugged reliability is a must.

With discharge rates of 90-100C, capacities ranging from 4800-6000mAh and in a range of configurations the Extreme Track LiPo range comes as standard with Overlander's unbeatable quality, true extreme power and excellent value for money.

Available now; a 4800mAh 2S 7.4v 90C Shorty pack, a 5800mAh 2S 7.4v 90C Saddle pack, and a 6000mAh 1S 3.7v 100C, all provided with tubes and necessary cabling!

This will help keep your batteries warm while out in weather normally too cold for Lipo batteries. Good luck, respond to the post with any questions!