Well the Boost Turbine 2000 looks to solve this problem with their rechargeable pack. Designed by the team at Eton, this backup battery pack comes equipped with a 2000mAh lithium battery that recharges your phone without an electrical outlet. Simply plug your phone into the pack via the standard USB port, and begin manually cranking away to generate power to recharge your phone. The device is constructed from a lightweight, durable aluminum that’s small enough to take with you on any trip. Purchase yours at Amazon.
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