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RE: Lumen - The Battery-Free Flashlight Powered By Your Body Heat
Pros and Cons
Pros:
-Producing electricity with your body heat, your heat is going away anyways
-Simple "regenerative" energy source for a flash light
Cons:
-You cannot use this in snow environment, where you cannot expose your skin to a metal surface
hmm good point, wonder how this would work in colder temperatures @biuiam