The Sunpack 2 Hour Car battery charger kit with two 2650mAh batteries can charge 2 AA or AAA batteries in as little as 2-3 hours. The charger automatically shuts off once the charge is completed. The charger plugs in directly into the car's 12 volt accessory outlet. This charger kit is a great accessory for people with today's Digital Cameras, or for any item requiring battery power. Features Recharge 2 AA or AAA Ni-MH batteries 12V car accessory plug Negative delta cut-off function Safety timer Automatic charging current selection for AA and AAA batteries Temperature sensors avoid battery damage from overheating LED lamp to indicate charging mode: Flashing gree LED = quick charge, Green LED = trickle charge, No LED bad cell detection Input: 12V DC Output: 2AA batteries up to 700mA 2AAA bateries up to 350mA