AA and AAA are the most common battery sizes ... with really low prices that don’t necessarily buy you much quality. These cheap batteries don’t always hold a charge for very long, and more ...

With NiMH AA batteries, you have to top them off before ... we'd at least have them a while, but they aren't cheap. So we'd go for the Eneloops because we can use them right away and recharge ...

Our evaluation included extensive discharge tests to see which batteries lasted the longest -- including AA, AAA, C, D and 9-volt options. We also considered the cost per battery for each option ...