A crash course in changing the world.
We use our phones everyday. It needs battery to use it, so i have thought about how to charge a new battery. My idea was to make a shoes that has a battery under the shoes and when we make a step it will generate power by heat and by the pump. It's simple, we just need to wear the shoes like this and walk for long time and when it gets low battery, we just need to take of the battery under the shoes and change it.
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