Instructions
Power on the PlayStation 3.
Press and hold the PlayStation logo button on the controller for two seconds. Note the battery icon that displays in the upper-right corner of the television screen. If it displays one bar on the battery icon, the batteries in the controller should be recharged.
Connect a USB cable to the USB port located on the controller and on the PlayStation 3 to recharge the battery pack. You can continue to play using the controller while you recharge the battery pack.