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en.clickpetroleoegas.com.br > at-15-canadian-girl-creates-battery-free-flashlight-that-transforms-body-heat-into-electricity-uses-four-thermoelectric-modules-to-power-an-mhbb01

At 15, Canadian Girl Invents Battery-Free Flashlight Using Body Heat to Power an LED for Over 20 Minutes, Wins Google Science Fair with a $26 Prototype

5+ day, 15+ hour ago   (868+ words) Ann Makosinski, a 15-year-old Canadian, created a flashlight capable of keeping an LED lit without using batteries, rechargeable cells, or solar panels. Named the Hollow Flashlight, the device harnesses the temperature difference between the hand holding it and the air…...

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