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Mother Nature’s rays will juice up this Garmin External Power Pack ($90; garmin.com) with 20 hours of battery life, which can then be used to charge other Garmin devices. The package includes interchangeable converter tips, like a mini USB, so you can charge your phone and other electronics. And if the tip you need isn’t included, not to worry, as there are many additional adapters available from other vendors the device is compatible with.
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