Wall clocks, non-mains accent lighting, cordless phones, smaller flashlights, TV remotes, games and toys, handheld kitchen or grooming gadgets, and various sorts of portable audiovisual technologies all rely on alkaline AA batteries to deliver economical mid-tier cell power.

Dimensions. An AA cell measures 49.2–50.5 mm (1.94–1.99 in) in length, including the button terminal—and 13.5–14.5 mm (0.53–0.57 in) in diameter. The positive terminal button should be a minimum 1 mm high and a maximum 5.5 mm in diameter, the flat negative terminal should be a minimum diameter of 7 mm.

Rechargeable batteries are more cost-effective over time, better for the environment and more shelf-stable than alkaline batteries. That being said, alkaline batteries do have certain advantages, such as their upfront price.

AA and AAA Batteries Features and Specifications AA batteries feature physical dimensions of 14.5 x 50.5 mm, while AAA batteries feature physical dimensions of 10.5 x 44.5 mm. Also, these batteries differ in volume: AA battery volume: ~8.3 cm³, ~0.506 inch. AAA battery volume: ~3.8 cm³, ~0.232 inch.