The Valken 7.4v 2500mAh Split Type Lipo airsoft battery is a high-performance lithium airsoft gun battery. This lithium battery has an initial burst discharge rate of 25C, and a constant discharge rate of 15C. 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 small Tamiya plug and XH 3-pin charging connector. They fit inside most full stocks and crane stocks.