Physicists
at Wake Forest University have developed a fabric that doubles as a
spare outlet. When used to line your shirt — or even your
pillowcase or office chair — it converts subtle differences in
temperature across the span of the clothing (say, from your cuff to
your armpit) into electricity. And because the different parts of
your shirt can vary by about 10 degrees, you could power up your MP3
player just by sitting still. According to the fabric’s creator,
David Carroll, a cellphone case lined with the material could boost
the phone’s battery charge by 10 to 15 percentage over eight hours,
using the heat absorbed from your pants pocket.
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