TrustFire Lithium Ion 10440 rechargeable protected battery. Average measured capacity of these batteries (measured by e-lectronics) is about 250mAh at a discharge rate of 100mA. These should not be used in high drain applications demanding over 3C or about 700mA, although the protection circuit will allow high drain, performance will drop off dramatically.

Charging notice: The 10440 is a small battery and despite popular advertising techniques which typically inflate capacity rating, the actual capacity at 100mA discharge rate is about 250mAh. For best performance, the 10440 should be charged with a 50-100mA current although it is difficult if not impossible to find such a charger. After testing with several commonly available chargers, e-lectronics has found that the UltraFire WF139 causes early charge termination although repeated tests with the Shekor charger have resulted in compatibility. The best discharge performance was measured after charging with a benchtop power supply locked at 4.2 volts and 50mA although this is not the most practical set up for most folks it does show how this small of a battery responds to high charging currents such as the 450mA from the WF-139. 

Various charge and discharge plots are shown below for comparison.

Operating Specifications:

*- All data including capactiy and size was measured by e-lectronics.