Figures above are based on Canon's standard test methods. Actual performance may vary according to shooting conditions, shooting mode used, ambient temperature, etc.

The PowerShot A10/A20 are packaged with "Panasonic Gold Alkaline" AA size batteries. According to the product catalog, one set (4) of these batteries will provide sufficient power to the camera for 200 images when using the LCD display and 500 images if not using the LCD display.

Canon has done some limited testing with other brands of batteries, and has found that the "Panasonic Gold Alkaline" and "Duracell Ultra" brands are approximately equal in providing power to the camera. Other tested brands showed less endurance, including (in decreasing order of endurance) "Valt", "Energizer", "Ray-O-Vac", and non-alkaline "Duracell".

Canon is not endorsing any particular brand of batteries, but camera owners should be advised that different battery brands might provide more or less endurance. Other factors are use of the LCD display (as previously mentioned), and ambient temperature. At lower temperatures, batteries provide significantly less endurance.

Canon does have available, as an optional accessory, rechargeable nickel-metal-hydride (NiMH) batteries in AA size and a charger capable of charging 4 of these batteries at one time (Kit CBK100).