Ride-a-long Pedal Powered Charger for Smartphones | Pedal power, Riding, Gifts for photographers
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DIY Pedal-Powered Phone Charger for Your Bike « MacGyverisms :: WonderHowTo
Amazon.com: K-tor Power Box 20 Watt Pedal Generator, Can Charge a 12 Volt Battery, Bundled with Powersteam 12 volt charger and Cree Rechargeable flashlight with integrated USB : Patio, Lawn & Garden