The Xtar 18650 is the ideal power source for high-drain LED flashlights, electronics, medical, and other high-performance devices. The powerful battery is able to hold a sizable charge of 3000mAh, providing plenty of power to keep your device running through extended use. The sophisticated cell is designed with a special protection circuit that helps prevent the battery from being over-charged, over-discharged, and short-circuiting, making it safer to use and giving it a much longer lifespan. XTAR batteries are also environmentally friendly leaving you with a clear mind.