MG4 EV to Debut as World’s First Mass-Produced Car with Semi-Solid-State Battery on August 5

MG is gearing up to make EV history. The company’s General Manager, Chen Cui, has confirmed that the upcoming MG4 EV facelift will be the world’s first mass-produced electric vehicle to feature a semi-solid-state battery. The updated MG4 will officially debut on August 5, bringing not only cutting-edge battery technology but also several notable upgrades.

The new semi-solid-state battery, developed by QingTao Energy, contains only 5% liquid electrolyte, offering enhanced safety and cold-weather performance. MG claims the battery has passed stringent tests, including a 360-degree puncture test, ensuring durability and safety in real-world conditions.

With a 70 kWh capacity, the battery provides a CLTC-rated range of 537 km, and a respectable energy density of 180 Wh/kg, comparable to traditional lithium-ion batteries. MG also notes a 13% improvement in cold-weather performance at –7°C, making the MG4 more reliable in colder climates.

While this isn’t the first semi-solid-state battery to hit the road—Nio’s ET5 previously offered a version with a 150 kWh semi-solid pack and 958 km range—the MG4 will be the first EV to mass-produce this next-gen battery tech, marking a major milestone for the electric vehicle industry.

Beyond the battery, the new MG4 will feature an upgraded infotainment system co-developed with Oppo, bringing voice control, gesture commands, and smartphone app integration for a more connected driving experience.

Pricing for the 2025 MG4 EV is expected to range between RMB 80,000 (~€9,400) and RMB 120,000 (~€14,000) in China, depending on configuration. This competitive price point makes the MG4 one of the most affordable EVs featuring cutting-edge battery technology.