The battery is specially designed to provide power for the controller of Microsoft Xbox 360. With high-performance rechargeable battery cell provides lasting power.Convenient to recharge--plugged into the PC USB port or the Xbox 360 console. With Over-charge protection and secure circuitry protect your Xbox 360 controller. - Product print '4800mAh' the exact capacity is 800mAh - Compatible with for Xbox 360 Wireless Controller - Protect your XBOX 360 Controller with secure circuitry - Recharge the battery pack directly by using USB cable - Connects to XBOX 360 console or anything with a USB port