MaximalPower AA NiMH/Ni-Mh Rechargeable Battery 2600mAh Batteries Pack Count X 4 Battery Type: Ni-Mh, Rechargeable Capacity: 1.25V / 2600mAh (Will NOT affect battery compatibility) Ultra High Capacity: Perfect for electronics that drains batteries fast 100% Compatible with all AA devices Up to 1000 Charge Cycles: Batteries can be charged up to 1000 cycles. Absolutely no memory effect so that you can charge battery at anytime