Anon8---) writes: First published on nature.com, a process called electrowetting using conductive droplets could provide 10 watts of juice to smartphones and other gadgets as you walk. So far Tom Krupenkin and Ashley Taylor have been able to produce a few milliwatts of power along tiny channels a few millimetres wide. They have patented the idea and are now concentrating on scaling up the device and designing a shoe to contain it.
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