How to order ?– Get an answer before you buy. Whether a quote or a specification request from our battery section,
you can count on our lighting fast follow-up.
We do not provide telephone support, the reason being that it is impossible to offer a quality product at an attractive price or answer your questions without making some compromises. We have decided to compromise on human resources rather than the technical.

MOQ– Accept small orders in your project startup phase.

Quotation– Contact us by our official Mail, the quotation/Datasheet／others request can be replied to within 12hours.

 Lead time(3-5days): We provide fast shipment for your urgent evaluating.

Shipment– UPS/DHL/FedEx Door to Door. Also, all lithium polymer batteries will be rigorously tested and charged 70% before shipment.

We stock all lithium polymer batteries are cells not finished batteries.

But it will assemble NTC/PCM/Connectors or series/parallel batteries according to your requirements. What’s more, the lead time just 3-5 days.

The discharge rate is 0.5C-2C;

Peak discharge: 2C.

If you want High-rate discharge, please contact us. We also have stock of some 3C-5C lithium polymer batteries.

Or go to our other High Rate Lithium Polymer Batteries official website

• Standard: After 500 cycles, the capacity will be <80%.It will be affected by the situation of discharge/recharge, and battery environment like temperature,humidity.

Temperature range:
Charge: 0 to + 45 ° C
Discharge: -20 to + 60 ° C
Charge retention / Storage:
1 year at -20 to 20 ° C> 70%
3 month at -20 to 45 ° C> 70%
1 month at -20 to 60 ° C> 70%

If the temperature is too low, the capacity will be significantly reduced;
If the temperature is too high, the battery is prone to internal short circuit;

In addition, we can make encryption that are suitable for low temperature or high temperature, but need to re-create and use a special electrolyte.

• Batteries that lose 20% of their capacity must be removed from service and disposed of properly.Discharge the battery to 3V/Cell, making sure output wires are insulated, then wrap battery in a bag for disposal

• Product Warranty:Product warranty is limited to original defects in material and workmanship for 90 days from the day of purchase. Warranty does not cover collateral damage, misuse, abuse, incorrect charging and other inappropriate use of this product.

Thickness tolerances is ± 0.3mm,
length is ± 1.0mm,
width is ± 0.5mm.

What’s more,the swell usually only affects the thickness of the battery,and it is within our tolerances.It means that thickness tolerances is ± 0.3mm(Maximum tolerances is± 0.5mm),that is swell range.

The overcharge of graphite anode of lithium polymer battery
The overcharge of positive reaction of lithium polymer battery
The oxidizing of electrolyte when overcharging
Lithium ion will be easy deposited on the cathode and stop lithium ion implanted. The efficiency of discharge and capacity of lithium polymer battery will be lost.

The circulatory lithium ion will be reduced.
The deposit lithium ion of metal will be reacted with electrolyte to Li2CO3 and LiF.
The lithium ion of metal will be happened between negative and septum, and it may increase internal resistance of lithium polymer battery.
Rapid charging is anther way to loss capacity of lithium polymer battery. When we doing rapid charging lithium polymer battery, discharge current is high, polarization will be happened on cathode, lithium ion will deposit obviously. The main reason of loss capacity of lithium polymer battery when we rapid charging is the matter of electronic chemical inertness, such as Co3O4, Mn2O3 and so on. They break the balance of capacity between cathode and anode. But the losing capacity of lithium polymer battery is irreversible.

Self discharge of lithium polymer battery is the losing capacity when the battery is not using. It have two condition when self discharge happened. No.1 is reversible losing capacity and No.2 is irreversible losing capacity. Reversible losing capacity is the capacity of lithium polymer battery will be recovered in next charging. Irreversible losing capacity is that the capacity of lithium polymer battery can’t be recovered in next charging. The influencing factor have the material of cathode/anode, technology, temperature and so on.

When Lithium Polymer Batteries pack is charged, it can be divided into the following reasons: the charger is reversed, or the charger is faulty; the protection board protection is not restored, or the protection board is defective; the lithium polymer battery pack is disconnected from the external use of the appliance.

For the above-mentioned unfavorable phenomena, look for the reasons in turn. Whether the charger is connected reversely, whether the positive and negative poles of the lithium polymer battery pack are connected reversely; re-enable the appliance to release the protection board protection, measure whether the protection board MOS tube has driving voltage; find out whether the wiring connection is loose or disconnect.

Lithium Polymer Batteries doesn’t usually work when it is used. There are several reasons: the voltage is at a low level, the protection board is protected, or the controller is protected; the protection board or the controller is damaged; the discharge positive and negative poles are reversed; the line is disconnected, or the switch is not on.

The above problems can be solved by charging Lithium Polymer Batteries pack, checking the protection board, or connecting the line.

During the recycling process, the lithium polymer battery pack stops when it is charged without the overall cut-off voltage of the battery pack. This situation is caused by the inconsistency of the Lithium Polymer Batteries pack’s single-string power or capacity. The high-capacity or low-capacity first charge is protected by the protection board so that the other strings of battery power are not fully charged to stop the charging process.

In this case, the Lithium Polymer Batteries battery pack can be recharged by the equalization charger so that the voltage of each string is consistent. If the capacity difference is significant, the Lithium Polymer Batteries pack with a significant difference must be replaced. But the most important thing is that the battery must be tested for capacity and divide capacity before assembly. Otherwise, it will be trouble to have a single string and re-disassemble.

When the Lithium Polymer Batteries pack is used, it will be discharged quickly. The reasons for this are: the battery is not fully charged; the single-string voltage capacity difference is significant; the battery pack is short-circuited or the Lithium Polymer Batteries pack self-discharge, causing the Lithium Polymer Batteries pack to be fully charged when it was consumed.

For the above defects, the Lithium Polymer Batteries pack can be recharged or replaced with bad Lithium Polymer Batteries.

The whole set of the voltage of Lithium Polymer Batteries is only half of the nominal voltage or negative voltage. This situation usually occurs when the Lithium Polymer Batteries pack is just assembled. The reason is that the Lithium Polymer Batteries pack is disconnected. The positive and negative poles are reversed, or the individual Lithium Polymer Batteries are not fully connected. After the Lithium Polymer Batteries are fully charged, it is normal, but it is left standing or low voltage immediately after using it for a period. This may be due to the large self-discharge of the Lithium Polymer Batteries or the micro-short circuit of the Lithium Polymer Batteries pack.

A nominal low or negative voltage must be rewired correctly. In the event of a low voltage at full charge, a bad battery must be replaced.

When the Lithium Polymer Batteries pack is charged or discharged, the temperature is abnormally high and hot. It may be due to the high internal resistance battery in the Lithium Polymer Batteries pack or the micro-short circuit condition of the Lithium Polymer Batteries pack, which causes the Lithium Polymer Batteries battery pack to heat up and discharge.

Long-term high-temperature operation of the Lithium Polymer Batteries pack is hazardous. In this case, it is necessary to replace the bad Lithium Polymer Batteries or repair the micro-short circuit.

The Lithium Polymer Batteries pack life is terminated within the promised usage time. This is because the Lithium Polymer Batteries pack has poor consistency or the Lithium Polymer Batteries pack’s series battery performance is particularly poor so that the battery pack is not fully charged during charging and cannot be discharged during discharge.

In this case, only bad Lithium Polymer Batteries can be selected for replacement.

The Lithium Polymer Batteries pack suddenly stops working during use. The reason may be that the Lithium Polymer battery is discharged. The minimum voltage of the protection board or the controller is reached.  The protection board or the controller stops working. The continuous operating current is too large (such as the electric vehicle starts or climbs under load) When the slope is over, the design protection current of the protection board or the continuous current of the controller stops the protection board or the controller, which will cause the battery pack to stop working suddenly.

The above situation can be solved by charging or re-enabling the battery pack or re-adjusting the parameter replacement protection board.

Lithium Polymer Batteries pack has a liquid spill during use or a sudden fire in the Lithium Polymer Batteries pack. This situation is rare, but it is hazardous after it appears. Leakage may also cause a fire and explosion, because the overflowing electrolyte lithium hexafluorophosphate is an organic solvent, and the ignition point is shallow. The reason is that the cell moisture is not completely dried, causing a side reaction inside the cell to generate gas to open the safety valve. The poor sealing of Lithium Polymer Batteries cap is poor. The cause of the fire may be a short circuit or leakage of the Lithium Polymer Batteries inside or outside, the Lithium Polymer Batteries pack is close to the fire source, and the packaging material is not fireproof.

If the Lithium Polymer Batteries is only leaking and replacing the leaking battery, if the Lithium Polymer Batteries pack is on fire, it must be extinguished with a fire extinguisher or fire sand. Do not use water, clothes, etc. to extinguish the fire. Because the water is a conductor, the costumes are flammable.

The Lithium Polymer Batteries pack is stationary or exploding during use. This situation is rare as the Lithium Polymer Batteries pack fires, but the consequences are severe. The cause is also due to external or internal long-term short circuits. The external short circuit is equivalent to an immediate super-large current discharge, which exceeds the limit of the cell protection board, and the internally generated gas is instantaneously ejected, which is very dangerous. An internal short circuit and a poor sealing effect of the diaphragm may also explode.

For the prevention of external short circuits, the protection board can be used to avoid. The protection board has short-circuited and over-current protection function to eliminate this risk, but the internal short circuit of the Lithium Polymer Batteries must be reduced by using the qualified manufacturer qualified battery.

In conclusion, Lithium Polymer Batteries selection, pack process, charger, protection board problems, line connection, and improper use can cause the Lithium Polymer Batteries pack to malfunction, try to avoid these hidden dangers and ensure the safe use of the battery pack.

Lithium Polymer Batteries selection, pack process, charger, protection board problems, line connection, and improper use can cause the Lithium Polymer Batteries pack to malfunction, try to avoid these hidden dangers and ensure the safe use of the battery pack.

Most importantly, all lithium polymer batteries have reasonable tolerances(±0.3mm — ±1.0mm）
It is hard to achieve a battery without tolerance based on model Lithium Polymer Battery development technology.

If your mechanical constraints is required require (without dimensions tolerance).
Then negative tolerance is one of the best choices to fulfill your custom requests.

The larger the dimensions,the capacity will more larger.

Yes, we stock many different models and update new models every month.
Additional specify certification(IEC62133,CE,CB,UL certifications) is possible but more time and effort is involved. Please discuss your individual requirements with your LiPol representative.