Dead smartphones aren’t so smart. If you travel, stay away from home for extended periods of time or simply forget to charge your phone occasionally, it might be wise to keep a portable charger in your bag. Over the past few years, I’ve tested over fifty different models to find the best power banks for different life situations. I looked at price, capacity, design and wattage to pick the candidates, then used each one to charge up a slew of different devices to see how they compare. This guide also includes info on what to look for in a battery as well the latest regulations on flying with a
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