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 Deans connector and a XH 4-pin charging connector. They fit inside most crane stocks and PEQ boxes. We recommend using our Valken Lithium Battery Charging and Travel Safety Sack and Battery Tester to safely test and charge all lithium batteries.