January 18, 2013 By News Staff
Answer: an "Electromagnetic Harvester"
German designer Dennis Siegel, a student at Bremen's University of the Arts, says he's built a device that charges a battery from the ambient power of other electronics, The Atlantic Cities reported.
"Where current flows is an electromagnetic field," Siegel told the publication. "So you could harvest an overhead wire as well as a toaster or a broadcasting tower. The only limitations are the strength of the field and its frequency (up to 2,4GHz). You have to place the harvester close to the source of the electromagnetic field to gain the most energy."
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