TNP Xbox 360 2 Pack Rechargeable Battery Pack + Dual Charging Station Dock Stand Base (Black) for Xbox 360 Wireless Controller [Xbox 360] Specially designed to provide power for the controller of Xbox Charge your Xbox 360 controller while you are playing games LED light indicator shows the batteries charging status Protect your Xbox 360 controller with secure circuit settings plus overcharge protection With over-charge protection and secure circuitry, protect your Xbox controller