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Amazon.com: Pedal for Power: A simple guide to help you build a bike powered generator eBook : Butt, Michael: Kindle Store
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Amazon.com : Pedal Power Bicycle Generator Emergency Backup Power System 500 Watts 12 Volts, 24 Volts, 48 Volts Direct Current Lead Acid Battery Charging System : Crank Generator : Patio, Lawn & Garden
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