Power up your photo equipment, flashlights, gaming devices, and other electronics via the Watson MX 4-Hour Rapid Charger with 4 MX AA NiMH Batteries. The 1.2V, 2550mAh nickel-metal hydride cells are pre-charged, rechargeable up to 500 times, and capable of retaining 85% of their capacity after 1 year in storage. The Rapid unit