Energizer 638624 500mAh NiMH AAA Rechargeable Batteries Energizer Always Ready Rechargeable Energizer 500mAh NiMH round cell batteries size AAA. They can be recharged to full power at any time using a broad range of chargers including our family charger, compact charger and ultra fast charger. Since the cells are rechargeable up to 500 times, they re a good economic and environmental choice. It makes them ideal in high drain devices such as portable CD players, MP3 players, remote controlled toys, hand-held games, palmtop computers or any time you want to replace your standard batteries in your household s battery operated devices when you use them a lot. Also known as: 24A, 24AC, 4003, 824, AAA, AM4, E92, K3A, LR03, MICRO, MN2400, ND61R, R03