Take your battery charger everywhere with the CTA rechargeable AA/AAA battery car charger! The CTA compact car battery charger is specifically designed to recharge AA or AAA batteries while you are on the road. With today's high-tech devices such as digital cameras and MP3 players , you will have piece of mind knowing that you won't get stuck without batteries. Simply plug the charger into your cigarette lighter adapter and you are set to go. Recharge your wallet with savings at Overstock.com! Features include: Recharges AA and AAA batteries 4 Ni-MH 1800 mAh rechargeable batteries Overcharge auto cut-off LED indicator Reverse polarity protection