Stellantis says its 77Ah FEST cells have demonstrated an energy density of 375Wh/kg with over 600 charging cycles, “a milestone for large-format lithium-metal solid-state battery.” In addition to faster charging speeds, the solid-state batteries can also deliver higher power output with discharge rates up to 4C, for greater EV performance.

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Stellantis claims that the new solid-state cells offer improved energy density and significantly faster charging times than Lithium-ion.