These very powerful Varta Rechargeable AA size batteries are 1.2V 2600mAh NiMH batteries. The 2600mAh rating is a measurement of the battery's capacity. The higher the mAh rating the longer the battery will last in an appliance. These extremely high capacity batteries are ideal for today's high drain equipment including digital cameras and flash guns. Varta rechargeable AA size batteries are pre-charged in the Varta factory and are Ready-2-Use as soon as you take them out of the pack. Often referred to as Varta Power Accu AA HR6 batteries these batteries keep their charge longer than ordinary rechargeable batteries. Once charged, Varta Ready-2-Use batteries will retain 80% of their charge for up to 12 months in storage. Nominal Voltage 1.2V Capacity 2600mAh Type Ni-MH Part Number Varta 5716 HR6. Four batteries per pack supplied.