The Valken 11.1v 1200mAh Split Type Lipo airsoft battery with T-Connector (Deans) is a high performance lithium airsoft gun battery. This nunchuck Lipo battery has no memory effect, and does not require discharging. This butterfly Lipo battery can hold a charge for months, and features a standard Deans plug and XH 4-pin charging connector. They fit inside most crane stocks.