Ioxus is the only fully integrated ultracapacitor design and manufacturing facility in North America, headquartered in Oneonta, New York with additional manufacturing in Japan. Established in 2006 by parent company Custom Electronics Inc. (serving military and commercial clients since 1964), Ioxus holds 100+ patents for high-performance ultracapacitor technology. Their products deliver the highest power and energy density in the industry (100F to 5,000F cells), with a 10-year design life and operating range of -40°C to +70°C. Ioxus has shipped 2M+ cells globally for transportation, grid stabilization, renewable energy, and military applications.