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How Wind-up Cell Phone Chargers Work

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  • Noguchi, Mei, and Ming-Chun Li. "Portable charger." U.S. patent 2007/025053 A1. Dec. 13, 2007. (Jan. 19, 2009) http://www.google.com/patents?printsec=description&zoom=4&dq=hand+crank+cell+phone+ charger&id=cEWjAAAAEBAJ&output=text
  • The Travel Insider. "Sidewinder portable cell phone charger." (Jan. 19, 2009) http://thetravelinsider.info/roadwarriorcontent/sidewinder.htm
  • U.S. Department of Energy. "How wind turbines work." Nov. 30, 2006. (Jan. 19, 2009) http://www1.eere.energy.gov/windandhydro/wind_how.html
  • Uberphones.com. "Wind up phone charger keeps you powered." Nov. 7, 2007. (Jan. 19, 2008) http://www.uberphones.com/2007/11/wind_up_phone_charger_keeps_you_powered/

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