Spy shots of Mercedes-Benz's solid-state battery prototype vehicle undergoing road tests have surfaced in overseas media. Built upon the EQS platform, this innovative model will endure a comprehensive battery of tests in the forthcoming months. The "Solstice" solid-state battery, a collaborative effort between Mercedes-Benz and the American battery startup Factorial, employs solid electrolytes with an impressive energy density of up to 450 Wh/kg, enabling an approximate driving range of 1,000 kilometers on a single charge. This cutting-edge technology is projected to enter mass production by 2030, potentially heralding a significant leap in the range capabilities of electric vehicles.