Put a set of our Best Buy AA disposable batteries in your most power-hungry devices ... Our rigorous lab tests for alkaline and lithium batteries simulate a range of devices with different power needs ...

Battery levels are determined by voltage output, which impacts how devices estimate charge percentages. The difference in voltage discharge curves between alkaline and lithium batteries explains ...

Listen up: We tested 15 AA batteries—the type typically ... batteries die), a top-rated Energizer lithium took 609 shots; the best of the alkalines, a Duracell, 76 shots; and the lowest-rated ...