Category Archives: Lipo battery for RC

Do you know about Grepow Company?

Inheriting 20 years of superb battery workmanship, Grepow has been always upholding the idea of high class and quality optimization in production. With outstanding pairing process, safe and reliable raw materials formula, steady and smooth discharge curve, rigorous quality control system, advanced automation equipment, research and development of cutting-edge technology and innovation of workmanship from over 200 people high end professional engineering team, Grepow is the only professional high power battery manufacturer in china that can produce NIMH, Li-PO, LI-FE batteries simultaneously yet maintaining very high standard within the industry. Grepow product is being sold to more than 60 countries around the world. The company has also set up its U.S and German Subsidiary.

The two brands Geshi ACE and Gensace were launched against domestic and overseas RC model markets, and have received a huge amount of responses. They have became very well known brands among RC model fans both domestic and abroad. Geshi ACE and Gensace have been always maintaining the very fine quality and have also gained a very good reputation. With their safe and reliable raw materials formula, advanced production process and rigorous quality control system, Geshi ACE and Gensace have made the batteries that are beloved by many RC model fans. The RC heli/airplane batteries are famous for its high capacity, long flying time, steady performance, outstanding aero shooting results, rarely puffing up and good cycling performance; while the RC cars batteries are showing off its brave, fearless character with its high C rate, super low internal resistance, high explosive strength and strong power during races.

Tattu has been launched few years ago in order to meet the market’s need. It can be separated into Tattu UAV battery and Tattu FPV battery lines. Tattu UAV batteries are industrial made specifically work for UAVs. It overturns the concept of RC models, and it precisely meets the need of UAV flight. It is a high-end UAV battery line that was recognized by the UAV industry once it was launched. Tattu FPV battery line is aiming at providing batteries that are more suitable for FPV racing. Tattu FPV battery come with super high C rate, high explosive power, very strong power drive, safe and reliable features. It was quickly become famous among both domestic and overseas market. It is the first choice and most-recommend to FPV pilots all around the world.

The article source: http://www.genstattu.com/blog/do-you-know-about-grepow-company/

Gens ace and Tattu Christmas special sale in Europe

The most excited Christmas is coming soon, as we know, The Christmas is the one of most important Festivals. When it comes to Christmas you may be thinking of the Christmas trees, socks and gifts… About the Xmas gifts, Gens ace and Tattu is bring some special gifts to thank for the customers support, we make a great Christmas special sale on www.gensace.de. This special sale is just for Europe.

Gens ace and Tattu 2016 Christmas special sale lasts 31 days. It begins from Dec. 1st and ends to 31st (GMT+1 TIME). Only valid for European market .You can take a big saving and it is the lowest price of the years, at the same time there will be four big sections weekly of this Christmas event that you can take advantages of:

1

1.Flash Sale

From 1st Dec. To 7th Dec.2016, except weekend
Flash Sale on first week. We have chosen some high quality and the most popular products that are the lowest price for you, being on sale for a very limited of time.
Like: http://www.gensace.de/tattu-1300mah-14-8v-75c-4s1p-lipo-battery-pack.html
http://www.gensace.de/tattu-1550mah-14-8v-75c-4s1p-lipo-battery-pack.html

2.Special activities

From 8th Dec. To 14th Dec.2016, except weekend
At the second week, there are special activities. We will make the four special sections including UAV, FPV, HELI and RC CAR sections, One Li-Po battery will be chosen from each section for sale each day. Time is limited, don’t miss it please.

3. Buy more save more

From 15th Dec. To 21th Dec. 2016
Third week, you can save money on our buy more save more event. You can take €10.00 off when you buy €300.00 or €30.00 off when order €600.00 or €1,000.00 order €50.00 off

4.Lucky Draw

From 26th Dec. To 31th Dec,2016
A. For the all individual customers, share or comment our Facebook @GensAceGlobal you will have a chance to win the free gifts.
B. For the new users that registered in December, we will live random draw ten lucky users, to win a big surprise gift.

This is the last time to have a big saving on www.gensace.de this year, the lowest price and mass products have discount, and also have a chance to win the free battery, extra coupon code and have a big surprise gift. Ends on 31st Dec. DON’T MISS. Click it: http://www.gensace.de/christmas or mail to info@genspow.de

Gens ace most popular RC car Battery 5000mah 2s Lipo

Gens Ace is one of the top rank battery corporations with deep research and manufacturing on NIMH, LI-PO, LI-FE by the effort of 200 professional engineers and technicians with 20 years exquisite battery technology. The Gens Ace brand holds the traditional concept of “excellent quality”, “Optimization”& “Priority” on Sales & Services. All batteries are tailored for various scales of the RC Models such as electronic cars, Nitro cars, Aero planes, vessels and also other models, toys, electric tools, electric bikes, electric autos, digital products etc.

Fits:

The reliable power for 1/8 and 1/10 rc car hobby such as: Losi, Traxxas Slash, HPI Strada XB 1/10 RTR Electric Buggy, Team Associated, Axial, Tamiya, Duratrax, Jammin’, Redcat Racing, Exceed RC, ElectrixRC, Emaxx, Bandit, Rustler version, Kyosho GP 4WD Racing Truck etc.

Features:

1. Quickly Recharged, 5C fast charge capable.
2. Long cycle life with 150 times minimum, up to 200Wh/kg energy density
3. Production in the most strict single cell capacity, voltage, resistance, discharge curve matching process.
4. Superior Japan and Korea Lithium Polymer raw materials.
5. Local after-sales service(located in Dublin, CA)

Specifications:

Minimum Capacity: 5000mAh
Configuration: 2S1P / 7.4V / 2Cells
Discharge Rate: 50C
Max Burst discharge Rate: 100C
Net Weight(±20g): 304g
Dimensions: 138.5mm Length x 46.5mm Width x 25.9mm Height
Connector Type: 4.0mm bullet to Deans
Wire Gauge/Length: 12#/100mm
Charge Plug: JST-XHR
Discharge Plug: 4.0mm bullet to Deans

Original price: $36.99 Now: $26.99

See more about 5000mah 2s lipo battery photos:

Source: http://www.genstattu.com/blog/gens-ace-most-popular-rc-car-battery-5000mah-2s-lipo/

The best RC car lipo battery for sale

As the rc car lovers, should you know what the RC car lipo battery is best designed your RC car, and where to buy the RC car lipo battery which has high burst and high quality? Today we will recommend a better brand of RC lipo batteries – Gens ace & Tattu.

About Gens ace and Tattu.

Firstly, I will introduce you some basic information about Gens ace & Tattu. Tattu is the sister brand of Gens Ace. It is more focused on Drones/RC CAR/UAV battery pack and designed with high energy density and high discharge rate cells. It has highly reputation in the market with its stable performance.

RC car lipo batteries eventually get old and weak. Some of the more high-end electric RC cars don’t come with batteries. But don’t worry, Genstattu.com got every kind of RC car lipo battery you might ever possibly need. All of these are available at different voltages or discharge rate.

What the Gens ace Tattu lipo car battery suitable for?

The Gensace&Tattu lipo car batteries designed for professional 1/10 scale and 1/8 scale on road and off road car: Traxxas Slash, Emaxx, Bandit, Rustler version, HPI Strada XB 1/10 RTR Electric Buggy, Kyosho GP 4WD RACING TRUCK SC8, Revo, Fiesta, Boss 302 Mustang, Duratrax, Helion and so on, there is always one suitable for your RC car.

We are mainly concentrated in the RC remote control model of industry and sold it all over the world. All of them are high quality and the best high discharge rate batteries to the world. We believe that our shop will be a good choice for you choosing a suitable battery.

Then where to buy a better RC car lipo battery?

If you need lipo car battery, come to the genstattu.com, here is the right place. Tattu and Gens ace RC car lipo battery for sale is official online shop where has Local Service, Quality Assurance, Best Prices and Fastest Shipping. Free shipping over $49.99 in USA, Over $198 in Canada. http://www.genstattu.com/car-battery-lipo.html

source: http://www.genstattu.com/blog/the-best-rc-car-lipo-battery-for-sale/

Tattu 1800mAh 75C 4S RC lipo battery Testing

I was sent one of the new Tattu 1800mah 75C 4S batteries to do a bit of testing. I’ve been flying it for a week or so and I have spent some time gathering data. Here is what I’ve found so far.

To give a bit of background, I am a multirotor pilot, and am primarily interested in miniquads. That being said the testing I’ve done applies universally. These high C rated batteries are useful beyond the bounds of multirotors into the world of 3D flying, and high performance aircraft.

Physical Characteristics

As with the Gens ace 2200mah I reviewed last month, my first impressions of this RC lipo battery are very positive. Gens ace/Tattu seem to use the same build techniques in both their lower discharge and higher discharge batteries. It has the same aluminum support that covers the battery and adds additional protection to the top and bottom of the battery. After a bit more research I have found that this actually provides compression during high discharge and according to research can significantly extend the life of the battery. Again, where the high current lines enter the battery casing they are re-enforced with additional heat shrink. The balance leads also come out the opposite side of the casing rather than the same side as the high current lines. In addition this battery has a plastic cover that extends over the balance lead cables, preventing stress on the cables when plugging and unplugging the balance cable. I will point out that on some chargers this can prevent the balance leads from fitting properly. Unlike the 2200mah, this battery came with XT60 connectors, which means no soldering for me. Battery dimensions actually exactly the same as the 2200mah 2S battery, and are accurate to the product description on the sellers website. The wight is just over 200g and the physical size is 105mm x 35mm x 25.4mm. Because of the aluminum plates the size is very consistent.

Tattu 1800mAh 75C 4S1P lipo battery pack with XT60 plug

Brand: Tattu
Capacity: 1800mAh
Voltage: 14.8V
Discharge Rate: 75C
Max Burst Discharge Rate: 150C
Configuration: 4S1P
Size: 105mm*35mm*25.4mm
Connector Type: XT-60
Balancer Connector Type: JST-XHR

Features:

1. Stable automatic stacking technology enables single cell capacities of 1800mAh.
2. The most strict single cell capacity, voltage, resistance, discharge curve matching process.
3. Superior Japan and Korea Lithium Polymer raw materials.

Tattu batteries provide high quality, reliable power for LRC Freestyle V1(270-296), CX Pro Quadcopter(228), ortex, Super Mini H Quad Power Train, drone and FPV etc.

Conclusions

My initial impressions of these batteries both in build quality and performance are very positive. Because of the very high C rating, it is hard to get an accurate picture of whether or not this battery can full fill a 75C (135A) current load, but given very few people have a setup that can draw that type of constant load, that’s not something we can easily gauge. Since I haven’t found a reliable method for testing internal resistance It’s hard to get an objective measurement of true C rating. I will post an update as soon as I can test these on a more reliable tester. I can say up to 65A loads this battery performs excellently. I was also very impressed with how well it recovered from first time abuse.

The battery provides both solid performance and the extras in the build such as the reinforced cables and aluminum compression plates add up to a very nice battery. For those interested, the battery is available here:
http://www.genstattu.com/tattu-1800mah-75c-4s1p-lipo-battery-pack-with-xt60-plug.html

Video: https://www.youtube.com/watch?v=0Rh6_MfOFpA

Thanks for QuadMcFly review and video.

The use and maintenance of the FPV battery

Now FPV all use Lipo battery, and there are many pilots that they all used 3s/4s battery in the FPV racing competition.

The so-called 3s is composed of three layers lithium cells in series that shows each cell voltage is 3.7 volts, each lithium chip actual voltage is in the range of 2.75 to 4.2 volts. The capacitance marked on lithium is that the energy was getting when 4.2 volts discharge to 2.7 volts. The FPV lithium voltage must be kept at the range of 2.75 volts to 4.2 volts for use. If the battery voltage is lower than 2.75 volts, it is excessive discharge, lithium battery will expand and the chemical liquid will crystallize. The crystallization may pierce the internal structure that cause battery short circuit, even changes voltage charge into zero. The remote model airplane voltage is higher than 4.2 volts, it is overdischarge, the internal chemical reaction is too excessive and the lithium will expand, if voltage keeps charging, the RC lipo battery will expand and burn.

No matter overdischarge or overcharge, both can cause a lot of damages to remote control model airplane battery.

Because FPV battery almost use for violent flight, so must pay attention to the skills about the use and maintenance of FPV battery.

1.The charge voltage should not exceed specified limited voltage (each battery chip is 4.2 volts), 4.25 volts is the highest limitation of each charge voltage. Charge current should not be too large (like the TATTU brand charger of 1500mAh 2 cell lipo battery should be set at 1.5 amperes to 2.5 amperes to charge)

2.Connect battery positive and negative electrodes correctly. If the anode and cathode of battery swap the cell’s poles over will not accept a charge. Reverse charge will make battery damage, cause heating, explosion, leaking and burn.

3.Overdischarge will make battery damage. When the battery discharges, monomer battery voltage should not be less than 3.6 volts (When single cell is 3.8 volts, the plane should almost begin to descend.)

4.The battery should be kept at a cool environment. When store the battery for a long time (over 3 weeks), suggest to put in the environment that temperature keeps at 10 to 25 degree Celsius, low temperature and non-corrosive gas. Battery needs to charge and discharge once three months to keep battery activity, and ensure every chip voltage in the range of 3.7 to 3.9 volts.

5.A good battery should have a good charger. Don’t use no-name charger.

6.FPV must choose the brand batteries, don’t use no-brand-name batteries. Single cell voltage has big difference.

7.When fly in the hot weather, try to choose the moments that before sunrise or after sunset that the temperature is not that high. Pay attention to the heat dissipation of the battery and the electronic speed controller. If can hang the batteries and electronic speed controller outside of the plane, try to dissipate heat outside.

Source: http://www.genstattu.com/blog/the-use-and-maintenance-of-the-fpv-battery/

How can we lack lipo car battery for carnival in the tracks

It is lucky for most of RC car fans to see various modified vehicles and shows performed by masters of drifting with roaring motors and drifting smoke. Many people think that RC cars are toys, which is absolutely not. RC is the abbreviation of remote control, and RC cars follow the strict restrictions regardless of body size or control effect and have high degree of simulation, which is far from what RC toys can do.

Carnivals in the tracks due to the best RC battery

There are several conventional ratios between RC cars and physical cars, such as 1:10, 1:8 and 1:5. RC cars can be classified into drift cars, racing cars, rally cars, off-road vehicles, desert trucks and monsters etc. They have the dynamical system and suspension system the same with cars, which can complete the acceleration from 0 to 100KM and reach 140KM easily.

Of course, whether drifting or acceleration, instantaneous burst moment must be awesome, or cool view can’t be shown. When it comes to this, we have to mention the power source of the RC cars – lipo car battery. On the market, high capacity, high rate, powerful battery will be more favored by RC fans, which is because speed is the focus of the competition, so an awesome battery is needed for carnival in the tracks.

Let’s take a better lipo car battery for you:

Gens ace 5000mAh 7.4V 50C 2S1P Hardcase Lipo Battery Pack 10# with 4.0mm banana to Deans plug

Brand: Gens ace
Capacity: 5000mAh
Voltage: 7.4V
Discharge Rate: 50C
Max Burst discharge Rate: 100C
Configuration: 2S1P
Connector type: 4.0mm bullet Deans
Balancer Connector Type: JST-XHR

This is a Gens Ace 2S 50C 7.4V 5000mAh LiPo Battery Hardcase Pack, with a factory installed Deans connector. Consumers trust the Gens Ace name to deliver the dependability and high performance they expect. The Gens Ace 50C 2S 5000mAh 7.4V LiPo battery pack has a high-capacity, high-discharge rate that gives you the power and run-time you expect from all Gens ace lipo batteries. This battery is ideal for all 1/10 scales & 1/8 RC car, etc.
Thoroughly tested and rated at a continuous 50C, the all-new Gens Ace 2 cell lipo battery Hard Pack is perfect for the rigors of on and off road racing. It features improved internal materials, heavy gauge silicon wires, burst of 100C and applies to almost all 1/10 racing with a fast charging of 5C.

Features:

1. Stable automatic stacking technology enables single cell capacities of 5000mAh.
2. The most strict single cell capacity, voltage, resistance, discharge curve matching process.
3. Superior Japan and Korea Lithium Polymer raw materials.

Application:

Equipped with industry-standard 4.0mm banana+XHR-3P plug, compatible with LiPo balance chargers for 1/8 & 1/10 RC car model

Video: https://www.youtube.com/watch?v=g6hbJ4lGQj0

It is difficult to operate a RC car. Short-term practice can not achieve the desired effect at all. After a period of practice, the feel from perfect drifting is not worse than that from a car, that is the charm of the RC car. Wish you have a good time.

Source: http://www.genstattu.com/ga-b-100c-5800-2s1p-hardcase-10.html

How to evaluate the quality of RC lipo battery?

It is so dazzling that there are numerous types of RC lipo battery on the market today. However, the quality of lithium polymer battery is a major worry for aeromodeller, and therefore, we today make popular scientific education about how to evaluate the quality of lithium polymer battery.

Most of current lithium polymer batteries and all the UAV batteries are the battery pack with composition of the connection in series and in parallel, including connection in series presenting as “S” and connection in parallel presenting as “P”. For example, 3S battery means 3 chips connected in series, and 6S2P means 12 chips of battery core with 6 chips connected in series and 2 chips connected in parallel.

Why it does need to be connected in series or in parallel?

It is determined by the lithium polymer battery. It is connected in series for increasing voltage, while as connected in parallel for increasing capacity. The C rate of battery will never change with the connection in series or in parallel. The battery with high C rate is used in the low-power equipment, such as remote control and receiving of image transmission, which has no effect on the equipment as long as the voltage does not exceed to damage the equipment.

How to evaluate the quality of single-chip battery core and battery packs?

Performance valuation of single-chip battery core

1.Target rate of C: is the discharge rate can reach the identified rate value of the battery

In accordance with the industry standard, the C rate of a battery is evaluated by discharging with X rate of battery capacity, and the battery discharge is not lower than 3.50V and the discharge curve is smooth around 3.50V. The C rate of the battery is the maximum value of X, which is evaluated by various indicators, including pressure drop, holding capacity of pole piece, temperature, flatulence or not, safety, etc.

2.Target rate of capacity: The capacity can reach the identified capacity value of the battery

In general, high-quality battery core shall be designed with 3%-5% higher than the design capacity, which is used in the high-quality battery chip of China’s major plants, with a single capacity around 5200MAH.

3.Cycling life

There is no standard outlining how long is the cycling life of lithium polymer battery in the current industry, due to the cycling life has a close link with battery production process. Through analyzing the current test data, it indicates that the capacity of the battery is decreased in various degrees by each process of charging and discharging.

Performance valuation of lithium polymer battery packs

High-quality single battery core may not produce a high-quality lithium polymer battery pack, but high-quality polymer battery pack must be composed of high-quality battery cores, which is related to the matching problems. Matching is a very complicated technique with high requirements for the equipment, which requires a battery pack composed of battery cores consistent with all capacity, the C rate and attenuation rate. Life of the battery pack is shortened by a large difference in any one of the three indicators, while as the similar values of the three indicators indicate improved performance of the battery pack to ensure flight safety.

To give an illustration

For example, 30C 3S 5000mAh lipo battery. The battery match with the capacity of three batteries are 5120MAH, 5120MAH and 5320MAH respectively, and all three batteries are charged to 4.20 V. After discharging 5000MAH on the model airplane, the remaining capacity of the three batteries are 120MAH, 120MAH and 320MAH respectively, which causes voltage unbalance in the battery pack by high voltage in the 320MAH battery and low voltage in the other two batteries, as certain relationship between capacity and voltage. In the case of discharging to 5150MAH, two batteries may actually change into reverse charging situation, and it may be wrongly assumed that the battery pack still has power as one battery has voltage, which will definitely affect the life of the battery pack.

This is caused only by the unbalance in the capacity. If there is a large difference in the C rate, it may cause unbalance during the charging process and ultimately affects the battery pack’s life, even with the same capacity, which is for the reason that the more discharging rate with a high C rate, and the less power consumption.

Therefore, it is a simple way to evaluate a battery is whether a high-quality lithium polymer battery or not.

Method:

Step 1: full of electricity, and make sure every single battery in the same pack with the voltage of 4.20V;

Step 2: install the battery pack on a aircraft and wait for each single battery’s voltage around 3.66 V;

Step 3: separate testing the voltage difference on each single battery, and the qualified high-quality battery has the voltage difference in 0.01V.

In addition, single measuring voltage of the high accuracy digital multimeter shall be prevail, and it is better to measure by a digital mutimeter in thousands.

Benefit to play RC cars

Many do not realize the excitement that comes from playing with Remote control cars, in fact, many actually perceive them as kids’ toy, and for some reason they are. But the moment you ask your kid for that remote control whether you are thirty or ninety, and as long as you enjoy tinkering with things, and you are a car enthusiast; you will love the enjoyment that comes from playing with Rc cars. It’s probably because during our childhood we never had an opportunity for such fun like today’s kids.

Anyway, what are the benefits that come from playing with RC cars?

It’s just fun

 

The primary reason why you need to play with these cars is that they are fun. There is nothing so satisfying as watching this small, powerful car tear through the backyard with 60 Mph, and quickly blazing across your pavement as you steers it and control the speed as you like. Although you kids will need supervision when playing with RC cars, the play is largely independent, so your kid will learn to form opinions and draw conclusions about their surroundings, which can help improve school grades.

 

Competition

 

Many people find their competition through online games, but the RC car gives a chance to compete in a much healthier way, not to mention in an exhilarating fashion. A kid who loves RC will want to compete with a family member, and would want to race their car much better than the family opponent. This is actually the most alluring aspect of RC cars; a chance to connect with other members of the family, outdoors not indoor.

Socializing

Play with RC cars will definitely make your kids new friends. You will most likely come across communities with RC clubs or gatherings on weekends, and Rc cars is a fun way for your kid to make new friends and develop social skills. RC cars have actually evolved to the point that they are now considered as small cars, so you will also come across elder clubs with these cars on their social gathering, so playing with these cars is a great way of making new friends even to the old.

 

Enhancing an interest

 

The moment your kid plays an RC car, they are slowly developing and enhancing another interest. Maybe they will want to be a car racing driver in future or maybe an engineer. As you might have realized RC cars uses the same fundamental principle as the one on the regular car. Some schools are actually using RC cars as a learning aid.

 

Hand to eye coordination

 

Just like video games, remote control vehicles can help a player increase hand eye coordination, but in a better way the video games, this is particularly because they use real word navigation. Also, the crashing and car damage are real, so playing with RC can actually hone reaction time when driving the real cars.

 

There are excellent selections of RC cars online, ranging from simple design to advances, used to new. Don’t forget to get a powerful battery because with mediocre brands; there is no fun with RC cars. Try RC Gens Ace lipo car battery, from the top rank company with extensive experience in battery manufacturing. Their 7.4V 5000mAh lipo battery has a high capacity, high discharge rate to give you the power and the runtime you need on your RC car.

source: http://www.genstattu.com/blog/benefit-to-play-rc-cars/

How to Prevent UAV Battery from Exploding?

Lithium ion polymer battery, also called lithium battery is the best choice of consumer UAV. Compared with the model and weight of the cells themselves, its energy density is pretty high, each cell voltage usually is 3.7 volts, so you only need less battery to get more energy than other rechargeable batteries. Lithium battery discharging rate is slow, charging takes a long time.

But use and recharge lithium battery inappropriately, will make the working performance get worse, even causes smoking and burning. In so to avoid UAV battery explode, or make the battery to the best performance use longer, need some necessary common sense. The following Gens ace &Tattu will give some tips are about how to use lithium battery.

Charge the Battery Properly

Use the proper charger to lipo battery and make sure the charger in accord with the battery model. When the battery connects charge, check the device connectivity or whether the battery pins connect fully. Don’t leave the charging devices and must be sure not to charge on the surface of inflammable substances, no combustibles around it. In case of fire, fire will spread easily. Recommend using special fireproof lipo battery(2S2P battery), battery pack, this can control the fires.

Neither too Much or too Little Power

Each battery charging never exceeds 4.2 volts or discharging exceeds 3 volts. In both of these cases, may cause the damage battery permanently. If the battery expands in the process of using or recharging, this shows that the battery has already damaged and can’t be used.

Safe Savings

For security, lithium battery should be best stored at room temperature, put in metal box or lithium battery fireproof container. If you will not use a fully charged battery few days, so when placed, must keep the battery power in 40% and each month need to charge and discharge the battery.

Avoid High Temperate and Cold

Extreme temperatures will affect battery performance and life. When you charge, ensure charge at the room temperate. Don’t charge in the cold garage or basement. Don’t charge in direct sunlight or near heat. When you charge or use lithium battery, be sure charge at the room temperature. If the battery runs out, ensure battery cool down before recharge.

Keep Battery Clean

When the UAV battery getting dirty will affect battery performance. Keep UAV battery compartments and battery connector clean. If battery contact becomes dirty, use soft brush to clean.

Long and Healthy Life Cycle

Lithium battery can use 300 to 500 charge cycles, this depends on the usage frequency of UAV, battery quality and how to maintain. If you only use battery a few cycles and then stop working, this means that these batteries have been damaged, have had defects or poor quality, suggest you stop using it at once.

Source: http://www.genstattu.com/blog/how-to-prevent-uav-battery-from-exploding/