Nexcell Rechargeable NiMH AA Battery, 1600mAh. Rechargeable battery technology is perfect for today's high drain devices such as digital cameras, PDAs, and MP3 players. It helps to cut down drastically wasteful chemicals, disposable battery toxic wastes, both hurting our mother earth.Rechargeable up to 1000 times with no memory effect. Lasts three times as long as standard alkaline batteries depending on usage. They lose some capacity after each charge and discharge cycle. The batteries last longer if you charge them often, before they are discharged completely.