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15-year-old high school student designs a flashlight that’s powered entirely by body heat

September 12, 2013 /

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Who has the time for batteries these days?

Ann Makosinski, a 15-year-old high school student from Victoria, British Columbia, designed a flashlight that’s powered entirely by body heat — specifically, heat produced from the palms of your hands.

The device, which she calls "hollow flashlight," uses Peltier tiles to transform hand warmth into usable — and battery-free — energy. A typical light beam can last up to 20 minutes once it’s produced.

By Eric Larson

Full Story: http://mashable.com/2013/09/10/hollow-flashlight/?utm_cid=mash-prod-email-topstories&utm_emailalert=daily

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