A Dodge Charger Daytona EV equipped with semi-solid-state cells is now undergoing real-world tests.

The program is part of Stellantis' collaboration with battery startup Factorial.

The automaker said the battery could make EVs go further, charge faster, and cost less.

Stellantis, the parent company of Jeep, Ram, Dodge, and 11 other automakers, has started real-world tests of semi-solid-state batteries, the automaker announced Thursday.

Solid-state batteries have proven notoriously difficult to develop and scale. That hasn't stopped a growing list of automakers from betting on them, even as conventional lithium-ion technology continues to improve and benefits from deeply established supply chains.