Solid-state batteries have the potential to make EVs far more affordable and practical, but their commercial development has a record of false promises that would make Tesla's full self-driving blush.

A breakthrough in solid-state electrolytes could double energy storage, improving battery performance for vehicles and devices.

Mercedes is getting new all-solid-state EV batteries for its next-gen models. Developed with Factorial, its new all-solid-state battery “breakthrough”

Mercedes-Benz and U.S. battery startup Factorial are working on a solid-state battery that should dramatically increase electric vehicle range and be ready for production by the end of the decade, the companies said on Tuesday.