AM Batteries announced it closed a $30M Series B in an oversubscribed funding round led by Toyota Ventures. New investment combines strategic corporate support from Porsche Ventures and Asahi Kasei, with financial investment from RA Capital Management - Planetary Health, Wilson Sonsini, and Industry Ventures. The round also includes existing investors such as Anzu Partners, TDK Ventures, Creative Ventures, Doral Energy-Tech Ventures, Foothill Ventures, and Zeon Ventures.