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Mercedes’s New All-Electric Prototype Just Went 749 Miles on a Single Charge

The solid-state battery provides 25% more usable energy and safer operation without flammable electrolytes, aiming for series production by decade’s end, Mercedes reported.

  • In February, a modified Mercedes-Benz EQS equipped with solid-state batteries completed a 750-mile journey from Stuttgart, Germany to Malmo, Sweden on a single charge.
  • This test followed Mercedes' development of lithium-metal solid-state battery technology with partner Factorial Energy to validate real-world performance.
  • The solid-state battery offers about 25% more usable energy at similar weight and size compared to conventional lithium-ion batteries, enabling the long uninterrupted drive.
  • Markus Schäfer, Mercedes' Chief Technology Officer, described the solid-state battery as a revolutionary advancement for electric vehicles following a test drive that ended with 85 miles of range remaining.
  • Mercedes plans to start mass-producing this battery technology before the decade concludes to improve driving range and charging convenience for its customers.
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autospies.com broke the news in on Tuesday, September 9, 2025.
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