These Panasonic EVOLTA Rechargeable AA batteries come fully charged and ready to use. They also stay charged longer than most other rechargeable AA batteries. These new Panasonic EVOLTA rechargeable AA batteries retain 80% of their charge after 12 months without use, therefore offering 365 days standby power. With a capacity of 2050mAh, these Panasonic Rechargeable Evolta AA batteries are ideal for a large range of devices. Ideal for a digital camera, remote control toys, electric toothbrush or Xbox and Wii remote controls. These Panasonic rechargeable Evolta AA batteries are NiMH 1.2V.