The Envie AA 2100 4PL Battery is a set of 4 AA Batteries. The set of batteries have a current rating of 2100mAh. These batteries have Ni-MH (Nickel-Metal Hydride) electrodes to provide you with a safe and stable environment. The batteries are rechargeable and allow you to use them multiple times. The AA Sized battery is compatible with a large number of devices including remote controls, electronic toys, cameras, flashlights, torches and various other devices.