Switzerland dug a hole the size of two soccer fields to install the world’s most powerful underground battery, able to output 1.2 GW within milliseconds.

Switzerland dug a hole the size of two soccer fields to install the world’s most powerful underground battery, able to release 1.2 GW in milliseconds and store 2.1 GWh at a multibillion-dollar price tag

Switzerland has started turning a deep construction pit in Laufenburg into something much bigger than an underground room. FlexBase is building a giant redox…