Designed to look like some kind of oversized battery, this crazy phone actually runs on just one small AA. There are some tradeoffs: it’s voice only, so no 3G or SMS; also, there’s no camera ...

This video provides an in-depth review of HiQuick AA and AAA Ni-MH rechargeable batteries paired with their smart charger. It evaluates battery performance, charging speed, longevity, and overall ...

That may not sound like a big deal, but one limiting factor in using LiPo in a AA or AAA battery is voltage. LiPo and Lithium Ion’s typical minimum voltage is 3.7 volts and would fry a standard ...

For the 1.5-volt group (AAA, AA, C and D batteries), we arranged the circuit loads in parallel, increasing the number of loads according to the capacity of the battery.

The spacers come in two sizes to make a AA into a C- or D-cell battery. Think of the spacers as a sumo-wrestling costume that makes the wearer look more like a helium balloon than a person.

We've tested and reviewed products since 1936. Read CR's review of the AAA Premium BAT8424AAA car battery to find out if it's worth it.

There’s a good chance you aren’t disposing of your AA batteries properly. But you may not be to blame. There’s no shortage of conflicting messages on what to do with your dead alkaline ...