Theis battery pack is compatible with X-360
Wireless controller,recharge your Xbox 360
Wireless controller while you play;
1. Charge cable enables continuous game play
 3.Battery fuel gauge through the X-box Dashboard .
4.Includes charge cable and NIMH rechargeable battery pack.
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Extra power means longer game play Up to 12 hours of play per full battery charge -High -performance rechargeable battery cell-Battery fuel gauge through the X-360 dashboard .
Convenient,rechargeable 
Power for your X-360 Wireless Controller .also you can continue to use your controller to play on your X-360 console while it charges with the charge cable .

1. The battery pack is compatible with for X‑360 wireless controller.
2. Come with charging cable can realize continuous gaming.
3. The 4800mAh battery can be used for up to 18 hours per charge.
4. Provide a convenient rechargeable power supply for X‑360 wireless controller.
5. At the same time, you can continue to use the controller to charge for X‑360 console through the charging cable.

Specification:

Item Type: Battery Pack
Main Material: ABS
Color: As Pictures Shown
Weight: Approx. 166g/5.9oz

Capacity: 4800 mAh

How to use:

Connect the data cable to the battery and start charging

Package List:

2 x Battery 

1 x Connecting Cable