Replacement Rechargable Battery for Nintendo Wii Remote with USB Charging Cable Never run out of battery power when you are about to score the winning point Save money and protect the environment by using the rechargeable battery High capacity battery that lasts 2~4 times longer than the standard AA batteries; Replacing the place of AA battery, and provide a clean, nice looking exterior on the cover Provide option to recharge the battery via the USB port of Nintendo Wii Console, or with a computer/laptop USB port (the machine must turn on) 1 year warranty from Fosmon Technology