PowerEx AA NiMh 2200mAh Rechargeable Ultra High Performance Batteries have 2200mAh true capacity, and can be recharged up to 1,000 times with no memory effect. Imaging Resource recently ranked the PowerEx 2200mAh as the #1 NiMh AA in the world. PowerEx Ultra high capacity AA batteries offer a super long run time that's at least 30-40% more than most competitors. Plus, our batteries can be charged up to 1000 times. Comes with a PowerEx battery carrying case capable of holding up to four AA or AAA batteries. Memory free operation means you can charge PowerEX batteries anytime you like and don't worry you can charge 2200mah PowerEx batteries using any AA compatible Maha Charger. Excellent for power intensive devices like digital cameras, MP3 Players, Game Boy, CD Players, Global Position System, etc.