The AA battery is the most widely used battery in the world and can be found in hundreds of thousands of devices.

The sizes in which the AA battery is available are alkaline batteries, saline batteries, long life lithium batteries and rechargeable batteries of different capacities. AA alkaline batteries have a shelf life of approximately 6 years, while AA lithium equivalents last up to 9 years before use. Rechargeable AA batteries are now available in NiMH with capacities up to 2850mAh and are also available in new 'pre-charged' technology that lets you use them right out of the box.