PowerEx AA NiMh 2300mAh Rechargeable Ultra High Performance Batteries have 2300mAh true capacity, and can be recharged up to 1,000 times with no memory effect. They 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. Memory free operation means you can charge PowerEX batteries anytime you like and don't worry you can charge 2300mah 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. Comes with a PowerEx battery carrying case capable of holding up to four AA or AAA batteries.