Xbox 360 PowerPak Black is a high quality NiMH rechargeable battery for excellent performance and long life. Compatible with Microsofts wireless controller for Xbox 360®, Play and Charge Kit and Quick Charge Kit. Also compatible with the Nyko Charge Station, Charge Base 360, and Power Kit. CE approved for safety and quality assurance. Eliminates the need for expensive batteries. Up to 25 hours of play per charge. Battery gauge accessible through the Xbox Dashboard.