Sanyo eneloop XX High Capacity AAA 4 Pack 900mAh Minimum Ni-MH Pre-Charged Rechargeable Batteries 4-pack of 900mAh Minimum Rechargeable AA batteries for digital cameras, remotes, and more Pre-Charged and ready to use,High performance at temperature as low as -4 degrees F Extremely slow self-discharge rate maintains 85 percent of capacity after 1 year of storage Can be recharged up to 500 times No memory effects allow batteries to recharged when fully or partially drained