Energizer Easy Charger is an attractive oval size Battery Charger with 3 interchangeable colored face plates (black, silver & pearl). It charges up to 4 AA or AAA batteries at one time. The easy to understand indicator lights tell you if batteries are charging or ready. A timed automatic shut off prevents overcharging. Fully charging 4 AA 2500 mAh NiMH (included) or AAA 850 mAh NiMH 850 batteries takes about 8/5 hours. Equipped with intelligent features such as safety timers, temperature monitors and trickle charge technologies, Energizer Chargers are the smart way to keep plenty of energy on hand.