Hyundai Motor Group is investing in all-solid-state batteries, which replace the flammable liquid electrolyte in conventional lithium-ion cells with solid materials. The technology could improve heat resistance, durability and energy density, potentially extending electric-vehicle range from about 500–600 km to more than 1,000 km per charge. Hyundai Motor Group R&D Head (President) Manfred Harrer said the company must join the development race and continue investing to secure leadership. Hyundai’s battery internalization strategy covers cell specifications and structures, while external manufacturers handle mass production. Toyota, Honda, BYD and Geely are also pursuing the technology, but difficult manufacturing processes, high initial costs and unresolved raw-material expenses may delay commercialization. CATL Chairman Zeng Yuqun said the technology remains at stage four of a nine-stage maturity scale.