Body heat leads to a bright idea

In the age of entertainment dominated by zombie apocalypses and an ongoing retreat from energy wasting technology, this new torch is a bright idea.

 

Created by Ann Makosinski, a 15-year-old Canadian high school student, the torch is powered by body heat, making it a great idea for camping gear, cars and other places where battery-dependent tools can peter out due to long periods of lying around unused.

 

What much-needed items can you think of that could benefit from a powering revamp? Or an update that keeps them useful for a lot longer?

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