Optimal for high-drain devices. Over discharge current protection.Over discharge voltage protection. Using an innovational positive protection circuit and its positions on the positive of the battery which is different from traditional circuit protecting board placement. Short circuit protection.Overcharge protection.Up to 500 charge and discharge cycles. Maximum 2A constant discharging current. Improved Battery Safety Free from Leakage of Liquid Electrolyte. Could charge with olight uc charger.