U.S. solid-state battery developer Factorial says cells from its aerospace program have reached an energy density of 450 Wh/kg. The company had set this target for the end of 2026. Factorial reported the milestone with its third-quarter results on November 10. It also recorded its first commercial revenue, earlier than its previous 2027 objective.
Few Details on Cells and Revenue
Factorial has not disclosed the cells’ capacity, chemistry or test conditions. It is also unclear whether the 450 Wh/kg figure was independently verified. The press release names neither the revenue amount nor the customer. According to Factorial, a Group I drone powered by its technology set a flight-duration record of 521 minutes in 2026, covering about 483 kilometers (300 miles).
In the automotive sector, Factorial says a lightly modified Mercedes-Benz test vehicle exceeded 1,200 kilometers (746 miles) of range on a single charge. Stellantis integrated the technology into a Dodge Charger Daytona demonstration vehicle. Mercedes-Benz, Stellantis, Hyundai and Kia are among Factorial’s backers.
Production Through Partners
Factorial relies on partners to scale up production. In September 2026, it partnered with Japan’s Mitsui Kinzoku to scale manufacturing of its Solstice all-solid-state cells. Mitsui Kinzoku contributes its expertise in producing solid electrolytes. Neither company has disclosed capacities or a timeline.
Sources:
https://www.globenewswire.com/news-release/2026/11/10/3400213/0/en/factorial-announces-third-quarter-2026-results-begins-generating-commercial-revenue-and-achieves-450-wh-kg-energy-density-target-for-aerospace-cells-ahead-of-plan.html
https://ir.factorialenergy.com/news-releases/news-release-details/mitsui-kinzoku-partners-factorial-scale-all-solid-state-battery
