Monthly Archives: July 2016

Review of Gens ace 5000mAh LiPo battery

Your electric RC car can have the most powerful brushless motor on the market and be geared to hit 90mph, but without the right battery nothing else even matters. When my beloved Gens Ace lipo battery pack started to show signs of wear, I knew it was time to purchase a new one, so I went with this lipo pack from genstattu.com.
This 7.4v 5000mah Lipo battery used air bag lining to pack,it came in a hard box that protect the battery more sufficiently during shipment.Of course,very pleased with the shipping.They dispatched via UPS from USA directly,so fast.
Trust the battery that consistently delivers the dependability and high performance, the Gens ace 50c 2s 5000mah lipo battery has a high-capacity, high-discharge rate that gives you the power and run-time you expect from all Gens ace lipo batteries.
Gens Ace 2S 50C 5000mAh Hardcase LiPo Battery Pack, with a factory installed Deans connector, and it is ideal for all 1/10 scales & 1/8 RC car, etc.

Specifications

company:Gens ace
Capacity: 5000mAh
Configuration: 2S1P
Dimensions 138 x 47 x 24 mm
Net Weight: 294 grams
Short exposure time max. 500A (100C)
Load duration max. 250A (50C)
Resistance (milliohms): <20mohm
Connector Type: 4.0mm bullet to Deans
Balancer Connector Type: JST XHR

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
Thoroughly tested and rated at a continuous 50C, the all-new Gens Ace 5000mah 50C LiPo 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.

High burst

I attend competitive racing occasionally, this is a pretty nice battery for the high burst rate, faster and stronger. And also I running on the loose dirt and indoor clay,it has better performing,long lasting battery. I recommend to anyone who wants to reliable battery.

Conclusion

I like this Gens ace battery,it gives me fun, and the Gens ace lipo battery is more and more drivers to widely used . Anyone who wants to have a high-discharge rate battery pack , without hesitation. In other words, whether you need to choose Gens ace lipo battery or not depends on yourself. And finally,wish you have fun.

Source: http://www.genstattu.com/blog/review-of-gens-ace-5000mah-lipo-battery/

About RC car lipo battery

Remote control vehicles popularly known as R/C cars are the types of cars or trucks which are powered by a battery and can be manipulated from a distance using a dedicated transmitter or remote. Readers should take note that the term R/C can also be used to refer to radio controlled vehicles. Several sources of power such as electricity and gas can be used to power remote controlled cars. Due to its numerous advantages, RC car lipo battery is strongly recommended to be used in powering remote controlled vehicles. Gens ace 5000mah lipo battery is a perfect type of power source for the remote controlled cars.

Typical RC car batteries usually get old and become frail within a short span of time. Some batteries which come with the remote controlled cars cannot be depended on upon to power effectively the vehicles bearing in mind the fact that remote controlled cars usually require a decent and lasting source of energy to ensure ultimate performance. Most of the high-end remote-controlled cars are available in the market without batteries. Users of such remote controlled cars should not worry about what type of battery to use in powering their remote-controlled automobiles since Genstattu has all the solutions to their problems.

Lipo batteries are commonly used in remote controlled appliances because of their huge advantages. Also known as lipoly battery, the lipo batteries usually dissipate large amounts of energy needed to power high-end remote control cars. Another advantage of the lipo batteries is that they are charged considerably faster than their NiMh relatives. The weight of the lipo batteries is also much less as compared to the weight of their NiMh counterparts an adaptation which facilitates swiftness of the remote controlled cars. The Gens Ace batteries are available in a variety of voltages and capacities to suit different requirements of different models of remote controlled vehicles.

One of the most common types of lipo battery utilised in powering remote controlled auto motors is the 11.1v 5000mAh lipo. This kind of lipo battery available at Gens Ace is engineered in such a way that it is capable of providing the needed power which facilitates remote controlled cars to attain the top speeds they were designed to achieve. Several other batteries of different capacities, cell counts as well as C rating are available in our online shop. Users of the lipo batteries should take note not to drain a three cell Li-Poly battery past 9.0v. To accomplish a long service life for their sets, clients should consider choosing a higher cut-off voltage lipo battery.

Remote control cars are very pleasant auto motors and can be great fun to the users. However, your experience with the remote controlled cars can be very disappointing if one does not use the correct type of battery to power them. Most of the remote controlled cars are designed to operate at a very high speed and consequently, their batteries should be very robust and up to the task. Gens ace 5000mah lipo battery is the most suitable type of cells to be used in powering remote controlled cars. Interested clients should visit our online shop Genstattu to get to know the varieties of lipo batteries provided and their relative importance in powering different types of remote controlled cars.

Which RC car lipo battery can make your RC car faster

Like the airplane model is loved by RC enthusiasts, the remote control car (RC car) is also loved by many drivers. Playing with the RC car can train up your brain, as it is a passionate sport. Here are some suggestions on how to choose RC car lipo battery or other interesting things that make your RC car faster.

At first, to choose the brushless motor

There are two types of the motor, brushed and brushless. Basically brushless motors make more power and it has parts that will hardly wear out. But if they do, you just need to change the internal parts. Whereas brushed motors have parts that are more likely to wear out. If something internal was ruined you can’t replace the parts. Generally brushed motors are cheaper than brushless, that is why most of RC cars come with brushed motors in the past. But nowadays almost all RC cars use the powerful brushless motor and they are geared to hit 90mph.

At second, to choose a better RC car lipo battery

Because of most the RC cars come without a battery, so you have to choose a battery so that your RC car can start running. Which RC car lipo battery is most important can make the RC car faster? We will recommend you the Gens ace&Tattu RC car lipo battery, they both have very high-capacity, high-discharge rate.

Gens ace 5000mAh 7.4V 50C 2S1P HardCase Lipo Battery

The Gens Ace 50C 2S 7.4v 5000mAh LiPo battery pack comes with high-capacity and high-discharge rate that give 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.

Specifications

Brand: Gens ace
Capacity: 5000mAh
Configuration: 2S1P
Dimensions 138 x 47 x 24 mm
Net Weight: 294 grams
Short exposure time max. 500A (100C)
Load duration max. 250A (50C)
Resistance (milliohms): <20mohm
Connector Type: 4.0mm bullet to Deans
Balancer Connector Type: JSTXHR

At third, to upgrade the ESC

The ESC (Electronic Speed Control) is the mediator between the battery and your motor. It connects to the receiver and receives signals from your remote telling it how much power it should release. So when you upgrade your motor you will have to upgrade your ESC as well.

Conclusion

As the driver, upgrade the motor, ESC and choose a better RC car lipo battery, are the factors that make your RC car faster. Gens ace&Tattu lipo battery can give you the power and run-time you expect from the all Gens ace lipo batteries. Finally, wish you play fun.

Source: http://www.genstattu.com/blog/which-rc-car-lipo-battery-can-make-your-rc-car-faster/

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 11.1v 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 car 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/

The lipo battery characteristics and applications

Due to the good characteristics, the lipo battery is widely applied in mobile phones, cameras, laptops, cordless telephone, remote control, electronic toys and other electronic devices.

Li battery, nickel-cadmium battery and NI-MH battery

The cathode material of Lithium-ion battery is graphite crystal, and the anode material is Lithium superoxide (LiO2). In the charging process, Li-ion moves from anode to cathode and embeds in the graphite layer. In the discharging process, Li-ion separates from the cathode of graphite crystal and moves to anode. Apparently, Lithium is always appeared as Li-ion rather than Lithium metal in both charging and discharging process. Consequently, this kind of battery is called Li-ion battery, Lipo battery in short.
The advantages of Lipo batteries are small volume, huge capacity, light weight, non-pollution, high voltage of single cell, low self-discharging rate, more cycle times, but its price is comparatively high. Nickel – cadmium battery is gradually being replaced because of the low capacity, serious self-discharging and the pollution to the environment. NI-MH battery (nickel-metal hydride battery) is cost-efficient and eco-friendly, but since its single cell voltage is only 1.2V, it has some restrictions in the application.

The lipo battery characteristics

1. higher weight-energy rate, volume-energy rate.

2. high voltage. The single cell voltage is 3.6V, which equals to 3 nickel-cadmium battery or NI-MH battery put in series.

3.Keep for long because of the low self-discharging rate. (This is the most obvious advantage)
4. no memory effect. Lipo battery does not have the so-called memory effect as Lithium-cadmium battery, so there is no need to discharge it before charging.

5. Long lifespan. In the common working condition, the cycle times of charging and discharging is more than 500.

6.charging quickly. 0.5 to 1 time of current can be applied to the charging process, and the charging time can be shortened to 1-2 hours.

7. can be used in parallel

8. It is the most advanced “green” battery of the world, because it does not threaten the environment and does not have the heavy metal element like cadmium, lead or mercury.

9. high cost. Compared with other kinds of batteries, the Lipo battery is more expensive.

tattu toppilot
The internal structure of Lipo battery.

Lipo battery is often divided into cylinder and rectangular.
The internal structure is spiral, which puts a very precise and highly permeable polyethylene film between cathode and anode as a partition. The anode consists of the Li-ion collector made in Lithium and CoO2 and the current collector made in aluminum film. The cathode consists of Li-ion collector made in Carbon sheet materials and current collector made in bronze film. The battery is filled with organic electrolyte solution. Besides, there are safety valve and PTC component protecting the battery in the abnormality or short out.
The voltage of single cell is 3.6V, which is not the infinite capacity. Therefore, it is common to put the single li battery in series or in parallel to meet any demands.

The charging and discharging requirements of Lipo battery

1. The charging of Li battery: according to the structural characteristics, the maximum charging voltage of li battery is 4.2V. Over charging is prohibited as the battery would be damaged if the Li-ion from anode is taken too much. The charging and discharging process are demanding, so we can use the professional constant current, constant voltage charger. When the battery’s voltage reaches 4.2V in the constant current charging mode, the battery would be charged in the constant voltage mode. And when the current lowers the 100 mA, it should be stop charging.
Charging current=0.1-1.5 times of the battery capacity. (e.g. The charging current could be 130-1950Ma for the 1300mAh battery.)
2.The discharging of Lipo battery: due to the internal structure, the li-ion cannot move to anode completely in the discharging process. A part of Li- ion should be kept in cathode to guarantee the Li-ion can embed in the channel freely, or the lifespan would be shortened. To ensure that there is some Li-ion in the graphite layer after discharging, the minimum ultimate discharging voltage should be restricted. In other words, Lipo battery cannot over discharge. The common ultimate discharging voltage is 3.0V/cell, cannot lower than 2.5V/cell. The time of discharging depends on the battery capacity and discharging current. Discharging time(hours)=battery capacity/discharging current. Discharging current of Lipo battery(mA) cannot exceed three times of battery capacity. (e.g.10000mAh 6S should charged in the current of 30A, or it will damage.)

There are protecting plates in the internal Lipo battery group, so just control the external charging and discharging current.

The protective circuit of Lipo battery

The protective circuit of two cells consists of the two field-effect tube and dedicated protective manifold block; overcharging control valve and over discharging control valve are in the circuit in series, which is supervised and controlled by the protective IC. When voltage reaches up to 4.2V, the overcharging protective tube stops and charging ends. To avoid mistakes, delayed capacitance is added to external circuit. In the discharging process, when the voltage becomes 2.55V, over discharging control valve stops charging the load. Over-current protection is that stops discharging the load when large current flows across the load, which aims at protecting battery and field-effect tube. Over-current test is to use the on resistance of field-effect tube as the test resistance and supervise the voltage drop, stopping charging when exceed the set value. There is delayed circuit in the circuit to differ the surge current and short-circuit current. That circuit has complete function, reliable performance. It is professional and the manifold block cannot be purchased easily, so the amateurs are hard to fabricate.

Source: http://www.genstattu.com/blog/the-lipo-battery-characteristics-and-applications/

The difference between li-ion and li-polymer battery

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

The difference between li-ion and li-polymer battery

Compare with li-ion battery,lipolymer battery has the following characterizations:
1. It would not leak the electrolyte, since it uses the colloidal solid rather than the liquid electrolyte.

2. It can be made into thin battery. For example, a 3.6V 400mAh 15C battery can have the thickness of 0.5mm.

3. It can be designed into multiple shapes.

4. The battery can distort and be flexible. The macromolecule battery can distort up to 900 around.

5. It can be made into single high voltage: the battery with liquid electrolyte can only acquire the high voltage and macromolecule battery by putting several batteries in series.

6. Because the battery itself does not have liquid, it is possible to obtain high voltage by making multi-layer combination inside the single battery.

7. The capacity is twice as that of the Li-ion battery.

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The lifespan of lipo battery

The factor influenced the lifespan is the charging cycle, and the times of charging will not directly influence the lifespan.
For example, the first day, we charge the battery after consumed half of the power, and the second day, we repeat that process. This is just one charging cycle rather than two. Therefore, a cycle may be finished by several times of charging. Every single charging cycle will reduce the power slightly. However, a superior battery can maintain 80% power after many charging cycles. That is why some lipo battery can use normally after two or three years. Certainly, it is also needed that we replace the lipo battery if the lifespan has ended.
The lifespan of lipo battery is commonly 300-500 charging cycle. We set the Q as the power provided by one-time fully discharging. Ignoring the reduction of every charging cycle, the lipo battery can power 300Q-500Q through its lifespan. Accordingly, if we charge the battery after consuming power, the battery could be charged for 600-1000 times. (if we charge the battery after consuming 1/3 power, the battery could be charged for 900-1500 times.) we cannot tell the exact number of charging times if we charge randomly. In a word, the total power 300Q-500Q is constant. Therefore, the lifespan is related to the total charging power rather than the charging times. Besides, the difference between the influence of deep charging and discharging and the influence of light charging and discharging to lipo’s lifespan is similar.
In fact, light charging and light discharging benefit more to the lipo battery. Only when the lipo battery is calibrated by the product has the need to charge and discharge battery deeply. Therefore, we can use the lipo battery for convenience and do not have to concern about the lifespan.
If the 11.1v lipo battery is used above the regulated temperature (over 35 degree centigrade), the power will continuously decrease, which means the flight time would not be so long. If charged under the high temperature, the battery would be further damaged. It is unavoidable that storing under the high temperature will hurt the battery’s quality.
If using below the 4 degree centigrade, you would also find the flight time of the battery has been reduced, and even some original lipo batteries of mobile phones cannot be charged. But, this situation is just temporary. Differ from using in the high temperature, once the temperature gets higher and the molecules inside the battery are heated, the battery would recover to the normal energy.
To maximize the performance of lipo battery, we should use it more often and make the electron flow. If we cannot use the lipo battery frequently, please remember to make a charging cycle and calibrate it (charge and discharge deeply) every month.

Source: http://www.genstattu.com/blog/the-difference-between-li-ion-and-li-polymer-battery/

Can’t wait for Toppilot? Please check out the R-Line!

Good news! For those who can’t wait to get through the process of applying a free Toppilot battery, please look forward to our R-Line professional FPV racing batteries.

What is R-Line?

R-Line is a brand new product line specifically designed for professional FPV racing competitions. It’s the selling version of Toppilot batteries.It’s also a subsidiary of the Tattu brand. It’s got higher capacity, lower internal resistance and lower landing temperatures. They are remarkably more powerful than other graphene batteries. Generally, R-Line batteries have the same specs as our popular Toppilot batteries.

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At the moment R-Line includes two items: the 1300mAh 4S 95C and the 1550mAh 4S 95C. R-Line is currently in version 1.0. In the future different versions will also be rolled out to meet the needs of different FPV racing competitions.

When and where can I get it?

R-Line batteries are schedule to be on sale since late August. You will be able to order them from our official shop www.genstattu.com. Due to the high demand R-Line will possibly be available for pre-order. Please follow us on Facebook or Instagram and check back regularly.

Source: http://www.genstattu.com/blog/cant-wait-for-toppilot-please-check-out-the-r-line/

What is FPV and the basic introductory parts of FPV

What is FPV?

FPV is the abbreviation of First Person View, it is a device based on remote control model airplane or remote control cars equipped with wireless camera to transmit images, which can be controlled on the ground.

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The basic common parts of FPV are aircraft kits, antenna, video transmitter, video receiver, image display and storage, remote control, camera and others.

FPV basic introductory parts:

1. Battery:

FPV batteries are generally lithium polymer batteries because of its better comprehensive performance, such as large energy density, light weight, resistance to high current. Even though, FPV cannot fly in a long time in flight, most of them can fly about 20-30minutes. Therefore, for more fun when flight, buying several batteries is a good way to deal with this problem. I recommend the Gens ace & Tattu 1300mAh battery and 1050mAh battery for your FPV battery.

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2.Charger:

The Li-po battery for UAV is in series which means there are several Li-Po cell connect in series internally, so in order to have every cell charges fully, it’s advisable to choose a “Balance Charger”.

3.Motor, ESC and flying control system

The motor consists of brush and brushless motor, brushless motor is very common in photography UAVs, which is powerful and quality. The motor will transmit the power from battery to spin itself speedly and then drive propellers spin to fly. And ESC is the controller of motor, it will transmit the signal infomation of flying system to motor current. The current size through motor is the speed size of propellers.

4. OSD and GPS

The UAVs GPS system is also very important, because one-key return, fixed-point and fixed height, hover and other functions depends on it. OSD is also known as figure transmission, it is the most important in FPV. Cause if you want to really have fun, the delay degree OSD is pretty critic.

5.Remote control channel, handlers and unlock

The size of the remote control and handle feeling is not very important, instead whether the remote control button layout reasonable and complex or not. The remote control channel means the up and down (throttle size), left and right, front and back, left spin and right spin. Quadcopter need to have at least 4 channel to fly safely.

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6.Propeller

Currently, the most commonly used props are the self-tightening pair opposite props. Pilots can purchase multicoloured self-tightening quality props to make your UAVs look more cool. The UAVs flight follow the principle of physics, whose installation is also two opposite sides. It mainly offsets the rotation thrust of spinning to make UAVs get rid of the earth’s gravity and fly in the air.

Source: http://www.genstattu.com/blog/what-is-fpv-and-the-basic-introductory-parts-of-fpv/

How to buy battery and use precautions

How to buy battery?

1. To choose has “national exemption” “Chinese famous brand” marks of the battery products and local famous brand products, that have the quality guarantee. Such as Gens ace&Tattu RC car lipo battery.
2. According to requirement of the electrical appliances, to choose the battery type and size, and also according to the size of the electrical appliances power consumption and characteristic, to purchase the fit battery.
3. Check the battery of the production date and shelf life, to choose the new battery, the new battery has better performance.
4. Check the battery of appearance, should to choose and buy the multicopter battery of package exquisite,look neat and clean and no leakage.
5. Pay attention to the battery marks, shall identify the manufacturer name, polarity, type, nominal voltage, trademark and others on battery. On the sales packaging, shall have the address, production date and shelf life or indicate shelf life of deadline, execution of the standard number. When buying the ALKALINE zinc manganese battery should has the “ALKALINE” or “LR”.
6. Due to mercury in battery is harmful to the environment, in order to protect the environment, when you purchase the battery should has trademark with “no mercury” “0% mercury” “no contain mercury”.

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Using the battery should be attention

1. Keep the clean between electrical and battery contact parts, wipe with wet cloth when necessity, after drying according to the polarity marked loaded correctly. It’s very important things when install the battery should to see clearly the battery polarity, we should be according to the requirement of electrical appliances manual installation using the recommended battery; If not,maybe lead to failure, and damage the electrical appliance or battery.
2. Don’t mix of the old and new batteries, should be replaced them at the same time. And don’t mix the same type but different brand of batteries, or you will make a set of some batteries in the battery over discharge in use, thus increasing the battery of leakage possibility.
3. Don’t heat or charge for disposable batteries, otherwise the possibly explosion.
4. Don’t short circuit, to avoid the battery leakage and heat by damage to the insulating outer packing.
5. Remove the battery when you don’t use the electrical appliances for a long time, and after used should turn off the power, lest make the batteries continue to discharge its internal battery adverse chemical reaction and lead to leaks.
6. Don’t discarded the wasted battery, as far as possibly to separated with other rubbish.

Source: http://www.genstattu.com/blog/how-to-buy-battery-and-use-precautions/

Tattu vs Graphene LiPo Battery Performance Tests

The article outlines the Tattu vs Graphene lipo battery testing procedures we used to come up with our results and presents the raw data gathered. Be sure to check out the actual results in our comparison article which will be released next week!

Graphene lipo battery Background

After Bonka announced that they were entering the “graphene” market behind Turnigy, I knew I wanted to do a comparison test pitting “graphene” batteries against each other and their predecessors. After contacting several battery manufacturers, I learned that pretty much everyone was poised to introduce a new range of battery packs, most of which are labeled “graphene”. I was excited about the prospect of comparing these “graphene” packs in total against a top-contender of the “last generation” of batteries.

What is the Graphene?

A little background on graphene. First of all – what it is is a sheet of carbon atoms, aligned in a 2-dimensional crystalline pattern. When it’s synthesis and handling is perfected, it could feasibly be used in the electrodes of the battery to thin the chemical layers that make up the battery and significantly improve both capacity and power. There is also research going into what is called “lithium sulfur” batteries, which use graphene as an integral component to make similar leaps in performance over traditional lithium batteries.
One thing is certain, though – these batteries do have something different going on with them. As you will soon see, they all have performance figures that are eerily similar to each other, and all differ from the “older” style LiPo I threw into the test.

The battery Tests

I performed 3 tests on these sets of batteries, outlined below.

20A Constant Discharge Test

The first test was a constant discharge to 12.8V indicated (3.2V/cell under load). The intent of this test was mainly to see the capacity of each battery. The load I selected was 20A – which is very close to my average flight load when I am not racing. I hooked the battery up to my load cell, a volt meter and my data recorder and let the battery discharge until the voltmeter read 12.8V. I chose 12.8V because it is well into the sharp voltage drop off point of every battery in this test but not so low as to seriously damage the batteries – they all jumped back up to 3.5-3.6V / cell when the load was released. After the batteries were done with the test, they were set aside for 30 seconds and then had their temperature measured. After that, I measured the balance of the pack, recording the voltage difference between the lowest cell and the top cell. Generally, when battery cells are mismatched, it is because they have a slightly different capacity than their mates – since this test is all about totally discharging the battery it is a perfect time to check that. Finally, the batteries were charged back up to full and the amount of charge put back into them was recorded.

40A Stress Test

The second test was a constant discharge to 14V indicated with a load of 40A. The stop point of 14V in this test is well before the batteries fully discharge – the intent was to see how much charge the batteries could push through while holding a decent voltage under high load. 40A is a pretty typical load when racing so I think this test is a good indicator what batteries will hold up well for that purpose. Once the batteries hit 14V, they rested for 30 seconds and their temperature was measured. Finally, they were once again charged back to full and the charge put in was recorded.

Flight Test

The final test was an in-flight test where the battery metrics were recorded with Blackbox. The purpose of this test was to show how the batteries performed when the pilot does bursts of full throttle during an otherwise constant load. Here is the procedure I followed:
1.Take off, fly in a circle using the OSD to keep a constant 20A discharge rate.
2.At 200mAh indicated consumption (on the OSD) do a full throttle pull-out for 3-5 seconds.
3.Descend quickly.
4.Continue flying at 20A in a circle until 700mAh indicated consumption, or 55% of the labeled capacity for the bigger batteries.
5.Do a full throttle pullout for another 3-5 seconds.
6.Descend and land.

What I wanted to see in this test was:

1.How much effect different batteries have on the amount of power available in a climbout.
2.How each battery handled a full power climbout when it was near-fully charged vs when it was close to being depleted.
3.How much voltage sag each battery experienced in a climbout and how quickly it recovered.
4.How an inductive load on the batteries differed from a resistive load.
Again-the original intent of this test was to use some of the ridiculous new N52 motors to really put the fear of god into these batteries. Unfortunately that could not happen for this test because the motors I am using are out of stock and I don’t have the funds to change out all of my motors. I intend to re-test this when I get some new ZMX v2s.

Disclaimer

I wouldn’t recommend anyone treat their batteries like I did in these tests. The in-flight testing is probably fine but batteries in this size really did not like the 20A full discharge and 40A stress test. Most of them got quite hot, especially nearing the end of the 20A test, and one even puffed slightly. Unless you like replacing batteries frequently, I don’t recommend ever discharging below 14V indicated on a 4S pack – your batteries are telling you that they cannot handle the discharge and you should listen. When LiPos are stressed like this, their internals undergo chemical changes which permanently affects their capacity and power delivery capabilities.

The Battery Lineup

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There were five 1300mAh batteries on the block for this comparison test. Dinogy sent us their new Graphene 2.0 packs and Tattu sent us a pre-release version of their upcoming “Pro Pilot” series of batteries. We also obtained a Turnigy Graphene pack and a Bonka Graphene pack for comparison as well. Finally, we have a normal Bonka 1300 75C pack to compare the new packs against.
Revolectrix sent us a very early version of their 1700mAh LiHV “GOPack” . I really wanted to include this pack in the test but struggled on how to do it – none of the other batteries were this big nor were they HV. In the end, I decided to test this battery charged to standard LiPo voltages (that’s 4.2V per cell) and included a standard Tattu 70C 1800mAh battery in the test to compare against. As a result, this isn’t a really fair test for the Revolectrix. I wouldn’t use these results to compare it to any of the other batteries but I do find them interesting. I’m eager to get my hands on one of their 1350 regular packs.

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For more information on these batteries, check out our comparison article, which will be linked at the top of this article when it is released.

The Battery Test Results

The raw data for our tests, complete with the graphs we’re posting below.

20A Constant Discharge Test Results

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Temperature: Measured after discharge, hottest point on battery.
Charge: Amount of charge put back into battery after test.
Cell Variance: Difference between highest cell voltage and lowest in battery.

All of the 1300mAh batteries were very well matched in terms of capacity. In terms of actual performance, the Dinogy and the “normal” Bonka held about .3V less than the other packs throughout the first half of the test, after which all of the packs were pretty much equal. All of the batteries held their voltage quite well up until they were almost entirely discharged – I was actually pretty surprised by how close this was. All of the packs other than the Turnigy Graphene got pretty hot near the end of this test. Definitely hotter than I am normally comfortable with. I was actually really surprised when I plugged the batteries into the cell balancer to find the opposite indication, though – the Graphene lipo battery was way out of spec and the rest of the batteries were pretty well matched. I guess with the lower price on the Turnigy Graphene you do not get as precise of a cell matching.
I graphed the Tattu 1800 70C and Revolectrix GO pack separately to not obscure the 1300mAh graph. In this chart I included the Tattu Top Pilot lipo as well for comparison against 1300 packs. Keep in mind that since the Revolectrix is a HV pack, it was not charged to it’s full capacity. Given that, I think it actually did quite well – managing to keep putting out consistent current all the way down to 12.8V – it actually seems to perform like a regular LiPo throughout the discharge curve, whereas I expected it to drop off somewhere in the 13V range.

40A Stress Test Results

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Cell variance was not performed on this test as all cells were matched on all batteries.
Voltage was only averaged when?load was applied.

I think this test is the most indicative of what these packs would experience while racing on a wide, open course. It’s also where the benefits of whatever technology that’s in them starts to show. Every one of the new battery packs kicked the ass of the “older” Bonka 70C by a large margin in every measureable way. What’s more amazing to me is that all of the new generation of packs were able to perform close to, or better than the Tattu 1800 70C – that’s amazing! It’s basically saying that these new packs can deliver to you the performance of a 1800mAh pack in a 1300mAh pack and weight. They all discharged over half of their capacity (actually – past where I would normally cut off when flying – which is normally 800mAh for 1300 packs) at 40A. That’s pretty damned incredible.
The 1300s all performed pretty similar, again. The Dinogy once again held the same voltage as the Bonka 70C at the low end – albeit significantly longer before dropping off – and the other packs held a higher voltage through the entire test. Voltage of most of pack was always within swinging distance of each other, with the average voltage over the test not varying by more than .07V between the lowest and highest packs. The Turnigy Graphene pack again came down noticeably cooler than the other packs. Maybe that’s because of the extra weight
The Revolectrix pack again showed the best voltage holding capabilities – staying noticeably higher through the entire test and delivering the highest average of all the packs. When it comes to power delivery, this is a damned impressive pack – but once again I can’t say how much of that is because it’s a LiHV in sheeps clothing.

Flight Test Results

For the flight test, I graphed the results of the performance of all of the packs together during the two “burst” cycles of full throttle climbs at 200mAh and 55% pack capacity. In order to better compare the packs, I had to add a few data points to each calculation (up to a half of a second of data) into the burst sections. This is because I could not time each burst to be exactly the same as each other since this was an in-flight test. If you download the Excel sheet above, the raw data is available to compare the adjustments I did. I did not add increased performance – just extended it for a few packs.

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Average voltage and current measured from the start of 20A current draw until the end of the last burst.
Temperature measured 30 seconds after landing. Missing Revolectrix data – it was lost.

Keep in mind that during this test, the batteries are not the limiting factor – it was the power system. All of the batteries in the test were more than willing to give the 80A requested by the motors in the initial climb. They then all performed similarly through both of the climbs with a large initial voltage drop-off followed by relative stability. Power decreased as the miniquad accelerated through the air and the props unloaded. Variations in the air density during the climb or angular changes in the quad can easily account for any of the variance seen in these tests.
Of note is that other than the Dinogy pack, the newer packs all held about .3V more than the “old” Bonka 70C on average throughout the entire test. They also once again trumped the Tattu 1800mAh on voltage holding capability as well. This seems to be the running theme of the test – all of these packs hold their voltage better under load when compared with my “older” reference packs.
I had seen a lot of people talk about how inductive loads (basically – loads that fluctuate rapidly with time due to the PWM motor drivers we use on our brushless motors) affect batteries differently than resistive loads. From the results in this test, I didn’t really see any difference between these types of loads. Perhaps I was not stressing the batteries enough.
I’m really interested to see how these perform with better motors.

Thanks for the Sponsors

A big thanks to Revolectrix, Dinogy and Tattu USA for sponsoring this test by sending us sample packs of their upcoming batteries. Our pocketbook isn’t super deep so it’s only by the contribution of great manufacturers and vendors like these guys that we’ll ever be able to get comparison tests like this. Thanks again.
Source: http://www.propwashed.com/graphene-lipo-battery-performance-tests/