It's still early on solid state batteries, but there are some working prototypes now. Samsung is now shipping prototype solid-state batteries to manufacturers.

It's still early on solid state batteries, but there are some working prototypes now. Samsung is now shipping prototype solid-state batteries to manufacturers. 500 Wh/kg, 9 minute charging, 20 year life are claimed. Manufacturing is hard and early versions will be expensive. BYD management claims that solid state batteries will be for the high end. They're pushing lithium iron phosphate for now. Samsung just announced a small solid state battery for wearables. This technology may appear in small devices before it's in cars.