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 ...

Is anyone giving or receiving a holiday gift labeled "batteries not included"? We thought so. Listen up: We tested 15 AA batteries ... Overall, the tested lithium batteries performed much ...

The Energizer Ultimate Lithium AA is part of the Batteries test program at Consumer Reports. In our lab tests, AA batteries models like the Ultimate Lithium AA are rated on multiple criteria ...

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 ...