AA 4 Pack R2G Ready To Go Rechargeable 2150 mAh Batteries By Lenmar 4-pack R2G 2150mAh AA rechargeable batteries Pre-charged and ready to use right out of the package Advanced technology allows for extra long shelf-life and slow discharge rate keeps 85% of their charge after 1 year Environmentally friendly and economical - can be recharged up to 1,000 times using any NiMH charger 1 Year Warranty 4 Pack of 1.2V 2150 mAh AA rechargeable batteries, pre-charged and ready to use Ideal for CD Players, Game Boy Advance, MP3 Players, Remotes, Toys, Wireless Devices, Wireless Guitar, and digital cameras Holds charge at 85% for a year while not in use, average rechargeables need to be charged after 1-3 months Combines the ready to use features of Alkaline, and the reusable features of Nickel-Metal Hydride Can be charged as often as you want up to 1000 times with no memory effect and lasts up to a 1000 times longer than Alkaline Batteries