4400mah 3.7v miner light li-ion battery 1,3.7V/4400mAH 2,Over 500 ... life 3,High capacity 4,No pollution 4400mah 3.7v miner light li-ion battery Basic Characteristics Nominal Voltage3.7VNominal Capacity4000mAhInternal Resistance ... , Longer storage life than NiMH Batteries2, Light weight and higher energy density than any rechargeable battery3, Installed IC chip will prevent the ...