.4V 6600mAh rechargeable li-ion battery 1. Long cycle life 2. factory price 3. CE/UL/ ... cellWith BMS/PCM/PCB protection Application:for LED emergency light,dive light,Solar lawn lamp,LED light,flashlight,out door light,searchlight,tactical light ... .By air(UPS,DHL,FEDEX,TNT,EXPRESS and etc). External Li-ion Rechargeable Battery Pack 3.7v 7500mAh with High Quality