Pocket Hand Warmer
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Hey!
Where I'm from we have pretty cold winters, and I always wanted to have something that will produce heat and keep my hands warm. So as necessity is moter of "invention" I made this very simple heater that runs on a 9V battery.
I hope you like it and if you want to see more videos of this kind, check out my channel :)
Video: https://www.youtube.com/watch?v=eqBjQTOw6ms