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Nov 18, 2018, 2:30 pm155 pts
Ars Technica
A mock-up of what Energy Vault's tower looks like. (credit: Energy Vault) A company called Energy Vault has proposed a new utility-scale battery that is both old and new at the same time. The "battery" is mechanical, rather than chemical, and stores energy much like pumped hydro does, but it does it with…
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