The Infapower Home Charger will charge two or four AA /AAA, or one or two 9v Ni-MH batteries. It comes supplied with Infapower’s high capacity extra longlife AA 2500mAh Ni-MH batteries. Charge time for batteries supplied = 20 hours. Features include: manual charge control – all charging times are controlled by the user, short circuit protection, reverse polarity protection. Will charge any brand of rechargeable batteries.