Whether you’re a glued-to-your-screen smartphone owner who can never make it through a day on a full charge, or someone who just needs an occasional battery boost, USB power banks are a panacea for low-battery anxiety. After putting in 21 hours of research and 55 hours of testing, we’ve found that the Zendure SuperMini 20W 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 of reach.
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