As you shop for new batteries for your devices, you'll most often come across two types — lithium and alkaline. While on the surface, they might look pretty similar, inside, they're worlds apart.

and resting until batteries die), a top-rated Energizer lithium took 609 shots; the best of the alkalines, a Duracell, 76 shots; and the lowest-rated alkaline, just 49 shots. Our flashlight test ...

The Duracell Coppertop Duralock AA Alkaline is part of the Batteries test program at Consumer Reports. In our lab tests, AA batteries models like the Coppertop Duralock AA Alkaline are rated on ...