For powering high-drain electronics such as digital cameras, the most efficient batteries to use are high-capacity Nickel Metal Hydride (NiMH) cells. Higher capacity batteries store more charge and they can power your devices longer.

The highest capacity rechargeable AA batteries are: Ansmann’s 2850 mAh batteries, Powerex’s 2700 mAh batteries, and Bower’s 3000 mAh batteries. Typically, NiMH batteries are rated between 1800-2500 mAh. So if, for example, you are using three high-capacity cells in a device, that’s quite a bit more charge.

The batteries mentioned here are not the new hybrid rechargeable batteries that have a extended shelf-life, please see our review here.