The Valken 11.1v Split Type Li-ion airsoft battery is a high perfomance lithium airsoft gun battery made with 3.7v 18650 cells. This high-capacity nunchuck battery has a long recharge life cycle, and has on average 2-5 times more energy than normal Lipo airsoft batteries. This butterfly battery has no memory effect, and does not require discharging. This lithium ion battery features a small Tamiya connector and a XH 4-pin charging connector. They fit inside most crane stocks and PEQ boxes. We recommend our Valken 2-3 Cell Li-Ion Digital Display Charger for charging this Li-ion battery.