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 used ... Overall, the tested lithium batteries performed much better than the alkalines, especially in cameras, which tend to drain ...

Unlock to see our ratings and compare products side by side The Energizer Ultimate Lithium AA is part of the Batteries test program at Consumer Reports. In our lab tests, AA batteries models like ...

For AAA batteries, our Best Buys last an hour and a half longer ... Our rigorous lab tests for alkaline and lithium batteries simulate a range of devices with different power needs. These include ...

This is the product's overall performance score, based on key tests conducted by our industry experts in the CHOICE labs.