We've tested these battery packs to see how many times they can charge an average smartphone, and how efficiently they transfer power. We also compare power banks based on their power-to-weight ratio, which tells us how much battery life you get for the extra weight you're. After putting in hundreds of hours of research and testing, we've found that the Belkin BoostCharge Plus 10K is the best power bank to charge a phone, tablet, or another small, handheld device. It's an all-around great portable charger that can offer you peace of mind whenever wall outlets are out. These portable chargers and power banks give you the most boost when you're out of juice. Sarah has been writing about consumer tech since 2019 with a focus on ereaders, phones, and tablets. Autumn is here with a vengeance, and the cold weather is zapping the batteries in my gadgets much more rapidly.
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