There is energy in the air all around us, traveling in the form of sound, Wi-Fi and other signals. Duke University researchers announced they successfully converted microwaves into electricity, which could be used to power electronic devices. Their system is about as efficient as a solar cell, and they hope it could someday be built into mobile phones.
Story posted at: bbc.co.uk
via Gigaom http://feedproxy.google.com/~r/OmMalik/~3/wRjRX78AgkI/
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