This solution provides you with a rechargeable battery pack for your Xbox 360 wireless controller and a charging cable. Kiss those disposable batteries goodbye, as well as those late night runs to the store. This puppy saves you hundreds of dollars! Just snap in the battery, connect the cable to your controller and XBox 360 USB port and you"re ready to continue gaming while your battery charges. Battery provides up to 40 hours of additional gaming time when fully charged. SO go agead, it"s a no brainer!