EUROPE’S DEEPEST MINE TO BECOME GIANT GRAVITY BATTERY

Summary from the TLDR newsletter

The Pyhäsalmi Mine, an abandoned mine in Finland, is set to be transformed into a giant gravity battery to store renewable energy. The 1,400-meter-deep mine holds the potential to store up to 2 MW of energy. Gravity batteries are charged by lifting heavy weights - these weights are then released, and energy from the drop is used to power a turbine. The technology offers a potential future for mines approaching the end of their original service lives. Studies suggest that gravity batteries in abandoned mines could store enough energy to meet global electricity demands.