Form Energy Inc.’s batteries are far too heavy for electric cars. Using iron, Form believes it will spend less than $6 per kilowatt-hour of storage on materials for each cell. But the prize is huge both for investors and for society," says Ramez Naam, a clean-energy investor who isn’t involved with Form Energy. In 2017, he was also working on long-duration batteries and he and Mr. Jaramillo decided to together create Form Energy. It could take days to fully charge these battery systems, but the batteries can discharge electricity for 150 hours at a stretch.

Source: Mint July 22, 2021 09:33 UTC