We thought so. Listen up: We tested 15 AA batteries—the type typically used in digital cameras, flashlights, toys, radios, and remote controls—and found differences in performance and cost.

Ever wondered why some batteries are labelled AA, AAA or even AAAA? The naming system goes back to the early days of radio, when ‘A’ batteries powered low-voltage circuits and ‘B ...

[Ray’s] breadboard power supply lets you drain the last traces of power from ‘dead’ AA batteries. Electronics that are powered off of disposable alkaline batteries have a cutoff voltage that ...

These rechargeable batteries use NIMH battery chemistry. The AA battery stores up to 2,000mAh and the AAA battery up to 850mAh of power. Eneloop batteries are precharged and are ready to use out ...