In-reply-to » Deep Abandoned Mine In Finland To Be Turned Into a Giant Gravity Battery James Felton reports via IFL Science: One of the deepest metal mines in Europe -- the Pyhasalmi Mine in central Finland -- is to be turned into an enormous gravity battery capable of storing 2 megawatts of energy. [...] Despite the cool name, the idea behind gravity batteries is really simple. During times when energy sources a ... โŒ˜ Read more

Pretty cool!

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