There’s no better charger than the sun—at least if you’re trekking in the middle of Montana and the next wall outlet is 30 miles away. The following solar chargers are portable, durable, and should provide enough juice to keep your gadgets going all day long. But keep in mind you’ll need bluebird skies and some extra time on your hands—solar charging can take up to 10 hours or more, even on a good day.
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