Group 1 - The core viewpoint of the article highlights the steady progress in overseas solid-state battery development, with continuous breakthroughs in product performance and a mass production timeline set for 2026-2030 [1][2][3] Group 2 - Overseas solid-state battery companies are focusing on sulfide technology routes, with energy densities ranging from 301-560 Wh/kg for various companies including Solid Power, QuantumScape, Factorial Energy, and Samsung SDI [1][2] - Solid Power's revenue for 2024 is projected at $20.14 million, a 16% year-on-year increase, with R&D expenses of $73.34 million, up 34% year-on-year; QuantumScape has not yet generated revenue but has R&D expenses of $380 million, a 10% increase year-on-year [2] - Solid Power's sulfide solid-state battery has an energy density of 390 Wh/kg, while QuantumScape's QSE-5 cell reaches 301 Wh/kg with a 10C discharge capability; Factorial Energy's Solstice battery offers a range of 1000 km, and Samsung SDI's silver-carbon negative battery achieves 900 Wh/L with a 9-minute fast charge [2] - Collaboration between battery manufacturers and automakers is deepening, with projects covering technology licensing, production line co-construction, and road testing; Solid Power's batteries are being tested in BMW's i7, while QuantumScape has signed a mass production agreement with Volkswagen's PowerCo [3]