Compatible with the Xbox 360 Wireless Controller, it includes a battery pack and a chargeable cable. You can play your games wile the controller is charging, it won't overcharge and charging will stop when the battery is full.
- High capacity battery, so it will give you a longer gaming experience - 3600mAh
- Indication light will show you when the battery is charging
- It can charge you Xbox 360 controller directly with a charging cable
- The kit can protect your Xbox 360 controller with secure circuitry and overcharging protection
- Battery pack output voltage: DC = 2.7v / 300mA
these are really good