In a nutshell, the company , Form Energy, was founded by Mateo Jamarillo. He was formerly Vice President of Products and Programs for Tesla’s stationary energy storage program. Gates and Bezos are investors. It takes iron pellets and air and through reverse oxidation ie rust, it creates energy to be stored. Cost is 10% that of lithium. I've only read about it replacing "legacy" power plants and haven't read anything about EV batteries, thus my question to this group.