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Solar powered charger...
The Hand Crank Emergency Cell Phone Charger - Hammacher Schlemmer - This is the charger that converts one minute of hand cranking into 30-second bursts of emergency power for a connected cell phone.
Turn Tap for USB Power
Sony hand-cranked USB charger replenishes energy without an outlet.....this would be good for the zombie apocalypse, or camping...
High-capacity backup battery will keep you powered for a week.
USB rechargeable batteries
Recycle cardboard into a DIY cell phone charging holder.
A battery with a USB plug on it that fits in your purse for charging your phone when you aren't around any outlets for a long time (camping/beach/shopping etc)