NITECORE NL2160HPi is a high-energy-density 21700 i-Series Li-ion battery with a 6000mAh capacity and 20A continuous discharge current. Its patented i-Series design features both positive and negative polarities at each end of the battery, enabling efficient power delivery and compatibility with NITECORE intelligent systems. Designed for NITECORE 21700 i-Series flashlights, it is compatible with models including the P10i, P10iX, P20iX, P30i, P23i, P35i and SRT7i series. With 3.6V voltage and 21.6Wh energy capacity, it combines extended runtime with the high-current output required by high-performance flashlights.