The German automaker has unveiled that a prototype EQS, equipped with a solid-state battery developed in collaboration with US startup Factorial Energy, has begun real-world testi

Mercedes has begun testing an EQS equipped with a solid state battery. It provides 25% more range than a lithium-ion battery of the same size and weight. Solid state batteries offer higher energy densities and safety benefits over traditional batteries.

A version of the Mercedes EQS is testing solid-state cells from Factorial teasing a 25% boost in energy density. Will it really deliver the 621-mile target?