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 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.

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.

How to choose the best Lipo battery for FPV

Does Larger battery allows for longer flight time?
Unfortunately the increase of flight time isn’t proportional to the increase of battery size.As the battery gets larger, the increase in flight time becomes ineffective. Eventually it will reach a point where it just doesn’t gain any more flight time with bigger battery (even lose flight time). This is mainly caused by the weight of the battery. Also note that the heavier your copter gets, the less agile it will be.
There are techniques you can use to help with selecting FPV battery – creating graphs and mathematical model in Excel,
which I found really useful when comparing various products of the same kind. I recently bought some 4S batteries for my FPV quad , like Turnigy Nano 4s batteries and Tattu 4s batteries
I will use these as an example. This technique should be useable for any multicopters, including the 250 mini FPV quad.

List All Batteries and Create Graphs

First, list all the batteries with different capacities, brands of the same cell number. You can include their weight, price, etc in your table. For example I was looking for 4S lipo battery for my FPV and here is the table I created.

Listing batteries and data

From these data, you can create some very interesting and useful graphs, for example I usually do
Density, which is capacity per gram (= capacity / weight)
Value, which is capacity per dollar (= capacity / price)

From the above graphs, if I am only going for best performance and not worry about the price, I would definitely go for 2650mah, 3000mah, or 3300mah FPV batteries.
These graphs tell you some insights into which battery has the highest price/performance ratio, but it doesn’t tell you whether this is the best battery for your RC aircraft, quadcopter or tricopter. To do that, we need to create a mathematical model.

Build Mathematical Model to Estimate Flight Time

By using this model, you will be able to calculate the flight time of any battery. Of course, this is just an estimation, but it will give you an rough idea what battery to go for, and save you from spending too much money and time to try each type.First of all, you need to get one battery first, and collect data using it. Basically the data we need is flight times under different loads. You can collect some other data as well to help you identify what is the max load your FPV can take, for example, the throttle value, current etc.
For example, I used a 3s 2200mah lipo battery, and tested the flight times under different load weight (0g, 110g, 220g, 340g, 405g, 515g – all these weights are physical items I can find in the house that’s why the uneven numbers). This as below is the data I collected from 6 test flights.

I always land the FPV when the voltage alarm beeps, which is when the voltage reaches 3.5V per cell. The column “Actual Capacity Used” is not really needed, but I collect it just to make sure my data is valid. I got that from my charger, when I charge it fully at 4.2V per cell, I know what capacity was used in the previous flight.?I then work out “mah / second”, which is the speed of power consumption, and we can draw a graph from this.

So here is the model. “Cap at 3.5V (86%)” is the effective capacity that can be used during a flight.?I am making an assumption that the voltage drops down to 3.5V when 86% of battery capacity is used. “mah/s” is calculated from the above equation, we can work out the mah/s for each FPV battery, depends on their weight.

And now the estimated flight time is roughly equals to effective capacity divide by mah/s. For example for the 6000mah battery, the effective capacity is 5160mah, and the speed of power consumption is 5.75mah/s, so the flight time would be 898.16 second which is nearly 15 mins.

That’s the analysis I always do when buying FPV batteries. There are a lot of assumptions above, so also do your research on the flight time, ask people for their experience, to verify your theory.

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.

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.

Top 5 Benefits of Gens ACE Batteries

Lithium Polymer (Li-Po) battery has high power to weight ratio making it popular in electrical equipment and devices. Due to the compact size, weight and flexibility of remodelling in any shape and size, it is widely used in RC vehicles. Unmanned Air Vehicle (UAV) or drones are widely talked about for fun or by the military for special recon purposes. They come in different size and background according to its function. Manufacturers are always on the look to reduce weight to obtain more performance from the aircraft with the available power. In this case Li-Po battery is used for an electrically driven UAV.

Pilot in command form the ground needs to know the amount of energy available in the battery to know the remaining flight time. A device must be integrated in the UAV to monitor the energy left and relay this information back to the ground. Power consumption varies with the change in the environment such as wind, temperature and also the flight time spent during climb, cruise and descent. Thus, it is essential to know the limit and capacity of a Lithium Polymer battery.

Gens ACE had very humble beginnings having been started out of a garage with the Gens Ace Temperature Monitor for nitro engines in 2001. In 2002 Gens ACE introduced it’s first NiMH and NiCD batteries. Back then, as is still true today, Gens Ace focuses on selling high quality LiPo batteries at realistic prices. Gens took on LiPo battery packs almost since the beginning when LiPo battery technology first began to make an impact on Radio Control vehicles about 7 years ago. Since then we’ve carried a variety of packs for all your RC needs big and small, land, sea and air. Gens have evolved with the technology in these few short years and the results show. Gens Ace are one of the top selling brands of rechargeable RC battery packs in North America and our products are found in more than 50 counties globally.

Top 5 Pros of Gens Ace Batteries

The following top five benefits distinguish Gens batteries.

1. Gens Power Packs Have Patented Adaptability

Gens’s patented UNI plug makes its LiPo, NiMH, and LiFe battery packs are extremely versatile. Designed to handle even high-current battery power,the UNI plug for Atomik brand RCs comes with adaptors that fit Traxxas,Deans, Tamiya, and EC3 toys, making tricky, DIY soldering of adapter plugs unnecessary.

2. Soft Silicone Wire Leads for High Performance Power

Gens uses soft silicone wire connectors. Because they are flexible, they are easily adaptable to various installations in tight spaces. Silicone is resistant to temperature extremes, minimizing meltdown risk and frost damage should the RC toy be left outdoors.

3. Gens’s Limited Lifetime Battery Replacement Policy

A company’s warranty policy often indicates the quality of its products. Gens offers an impressive lifetime replacement plan on every rechargeable RC battery pack it sells. The manufacturer pledges to replace or repair defective products free within the first year after purchase. Thereafter, purchasers have the option to replace a power pack for a new one of the same description and receive a 30 percent discount on the original purchase price.

4. Gens’s Sizable Selection

Gens’s battery selection features dozens of choices to suit just about any RC or Airsoft power supply demand. With three different types of batteries plus plenty of package configurations, Gens’s catalog offers virtually all of the options available for RC hobbyists.

5. Connectable RC Batteries for More Power

When powering a larger RC, connecting Gens battery packs in a series multiplies the voltage. The manufacturer makes this easier in two ways. First, Gens sells battery-wiring harnesses that have plug-in connectors for hooking power packs together. Secondly, the company offers discounts on multiple packs of its batteries, making it less expensive to ramp up the power.

Where to buy Gens Ace Battery?

You can search Gens Ace battery on "Google", "Amazon", or direct go to our website: http://www.genstattu.com/. If you want to focus on our new RC battery information, please follow our facebook Gens ACE Global .