WSJ Tech News Briefing · Wednesday, August 12, 2026
Form Energy, a startup developing iron air batteries, has raised $750 million in a new funding round. These batteries can store power for several days, unlike conventional lithium-ion batteries, by using a process called reversible rusting. The company intends to use the funds to increase manufacturing and prepare for its first commercial products.
“And in another WSJ exclusive, a startup that makes giant iron air batteries has raised $750 million in a new funding round.”
“Unlike conventional lithium ion batteries, which can discharge power for a few hours at a time, Form Energy's battery system can store enough power to last several days through a process it calls reversible rusting.”
“Form plans to use the new funding to boost manufacturing and for its first wave of commercial products.”