Interesting facts Switzerland dug a hole the size of two football fields to install the most powerful underground battery on the planet, capable of releasing 1.2 GW in milliseconds, storing 2.1 GWh, and costing up to 5 billion Swiss francs. Alisson Ficher 17/05/2026 at 20:14
Construction Australia is digging 27 kilometers of tunnels to transform two dams into a giant underground battery of 2,200 MW, capable of storing 350 GWh and supplying 3 million homes for a week. Carla Teles 27/04/2026 at 12:19
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