GP ReCyko battery 2100mAh AA (4 battery pack), A NiMH rechargeable AA battery with eco-friendly properties, putting less stress on the environment and your wallet. With a cycle life up to 500 times, this battery pack of four is equivalent to more than 7,000 single-use batteries*. Pre-charged and is ready to use, it can stay up to 80% charged after 12 months thanks to its low self-discharge rate. With an operating temperature ranging from -20 °C to +50 °C, it delivers reliable performance even in extreme environments.