Pentax Rapid Charger w/4 AA 1,800mAh Batteries Can charge up to four AA or AAA batteries, or up to two nine-volt batteries at once Can charge NiCD (Nickel Cadmium) or NiMH (Nickel Metal Hydride) batteries Features both front and back LED charge indicators, and a foldable AC plug Plugs directly in to the wall and comes with four AA rechargeable NiMH batteries For use with Pentax S40 digital camera and other devices that use AA batteries