Potenco’s Pull-Cord Generator (PCG) keeps portable electronic devices working all the time while providing freedom and independence from traditional power sources.Simply hold the PCG in the palm of one hand, pull the cord with the other hand, and generate instant energy. The PCG safely powers rechargeable batteries and provides energy for a variety of critical electronics such as lighting, cell phones, radios, GPS, PDAs, and water purifiers.
I have no facts on reliability or the likely selling price, both of which will gate success - but the concept and the execution look very promising. Wired has some video.
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