The Pro Power Kit 360 is CE-approved for safety and includes 2 rechargeable NiMH battery packs and a USB play-and-charge cable. Play your favorite games longer with battery life that lasts up to 25 hours per charge. Make sure your wireless controller remains charged by plugging the charge-and-play cable into your Xbox 360's USB port. Keep track of just how much power you have remaining thanks to the battery gauge that's accessible through the Xbox 360 Dashboard.