ProLogium

ProLogium began mass production of its Gen 3.5 Lithium Ceramic Battery at its Taiwan giga-plant on 2 Sep 2026. The 185.4 Ah large-format cell measured 381 Wh/kg and 903 Wh/L in third-party TÜV testing, and qualifies as all-solid-state under GB/T 43568-2026: after six hours under vacuum at 120°C it lost under 0.05% of its weight, against a 0.5% ceiling. The energy density and the classification are independently measured, which is rare in this field; what the announcement does not give is a production volume, a cost, or a named vehicle programme.

ProLogium agreed to go public via a $3.8B SPAC merger with Translational Development Acquisition Corp. (Nasdaq: PRLG, closing 2H 2026) — billed as the only company that can publicly demonstrate a solid-state mass-production line. It opened a GWh-class gigafactory in Taoyuan, Taiwan (2024), has shipped 800,000+ cells, and is building a Dunkirk, France gigafactory backed by ~€1.4B in French subsidies. Proceeds fund its 4th-gen cells.