Our rigorous testing gives a fuller, all-round picture of every battery's performance. We measure their longevity when they're powering high-drain devices, test their capacity and how it changes after ...

Nov. 13, 2024 — An international team of scientists has identified a surprising factor that accelerates the degradation of lithium-ion batteries leading to a steady loss of charge. This ...

AAA, C, D and 9-volt options. We also considered the cost per battery for each option to ensure you're getting the best bang for your buck. Note that none of these options are rechargeable ...

If you don't have one of the best power banks already, you need one, and with great Black Friday deals on plenty of our top picks, now is the best time to buy one. You can find amazing deals from ...

Is your phone, tablet, or laptop typically in the battery red zone before the day's end? These portable chargers and power banks give you the most boost when you're out of juice. I’m a Mobile ...