The Valken 7.4v 1300mAh PEQ Type Lipo airsoft battery is a high performance lithium airsoft gun battery. This mini brick Lipo battery has no memory effect, and does not require discharging. This PEQ Lipo battery can hold a charge for months, and features a small Tamiya plug and XH 3-pin charging connector. They fit inside most full stocks and crane stocks.