Camelion AlwaysReady Ni-Mh Rechargeable Batteries provide high-quality green energy with excellent performance & is the ideal choice of ready-to-use rechargeable batteries. premium power, good for all applications pre-charged and ready to use  holds a charge up to 5 years  recharge up to 1000 times. Uses: game controllers, cameras, remote control cars, computer mouses, electronic shavers, and Solar Devices.