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Byline: JULIE MITCHELL
Despite vague warnings about brain cancer and car crashes, Americans are more dependent then ever on their cell phones.
But the more people rely on the devices, the more of a headache it becomes when they run out of juice. Dead batteries are especially frustrating when you're not near an electrical outlet.
Fortunately, a number of charging products can jump-start your batteries without electricity. And some work fast, so they let you bypass the several-hour wait most phones take to recharge.
These small, lightweight gadgets are good for hiking and camping trips and other times when an electric outlet and a traditional …