Modern technology has made cycling a fantastic experience - you can plan and check routes with your smartphone, and bring along tiny digital still and video cameras to catalog your experience. I use the great EveryTrail app on my iPhone to calculate routes and speed, but keeping it connected to GPS is a huge battery drain. Wouldn't it be great if you could not have to worry about killing the batteries of these guys whilst on your ride?
Turns out - you can, and power lies in your own two feet. With a little DIY muscle flexing, you can build a USB generator that's 70% efficient in converting your pedals into the energy needed for powering and charging your devices.
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Modern technology has made cycling a fantastic experience - you can plan and check routes with your smartphone, and bring along tiny digital still and video cameras to catalog your experience. I use the great 


IKEA.com dubs its 




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