... : 3.7V Capacity: 2200mah Cycle life>500 times 18650 li-ion battery 2200mah3.7vAdvantages:1, High energy density2, High working ... voltage for single battery cells3, Pollution-free4, Long cycle life5, No memory effect6, ... and higher energy density than any rechargeable battery3, Installed IC chip will prevent the battery pack from over charge and over ...