I Built an Atmosphere Powered Battery..

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Is it possible to store energy by using the atmospheric pressure on a vacuum? That's what we will try to find out in this video! We will built a functioning prototype of world's first vacuum powered battery/vacuum energy storage system, we'll look at the science that makes this thing possible and of course compare it's efficiency against other ways to store energy like pumped hydro, gravity energy storage and of course, conventional lithium-ion batteries.
Could this be the future of energy storage? Or was this project just a waste of time?