4400mah 3.7v miner light li-ion battery 1,3.7V/4400mAH 2,Over 500 cycle life 3,High capacity 4,No pollution 4400mah 3.7v ... miner light li-ion battery Basic Characteristics Nominal Voltage3 ... and connectors are available4, We could design and produce the battery pack with plastic shell and assembly procession for customized configurations ...