A Bike-Powered Phone Charger

Lynne Kiesling

As a cyclist, I occasionally measure my power output on the bike (you fellow bike weenies know how much attention we pay to wattage!), and wonder about using my work to some beneficial purpose beyond my own enjoyment, health, and sports training. There are gyms here and there that use their stationary bikes to contribute to their electricity supply, but here’s an innovation that makes such a use of cycling work more direct and personal: a way to use your power output to charge your cell phone. In addition to being clever, it’s good for cycling safety, reducing the probability of being out on the road with a dead battery.

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