Similar tech, I expect: https://arstechnica.com/information-technology/2017/04/startup-says-it-can-make-compressed-air-energy-storage-scheme-dirt-cheap/ https:

Similar tech, I expect: https://arstechnica.com/information-technology/2017/04/startup-says-it-can-make-compressed-air-energy-storage-scheme-dirt-cheap/ https://arstechnica.com/information-technology/2017/04/start... https://www.thenational.ae/uae/compressed-air-the-battery-of-the-future-1.338460 https://www.thenational.ae/uae/compressed-air-the-battery-of... https://www.engadget.com/2013/09/16/sustainx-turns-on-first-modern-megawatt-scale-air-battery/ https://www.engadget.com/2013/09/16/sustainx-turns-on-first-...