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Advent Technologies Holdings, Inc., an advanced materials and technology development company, operates in the fuel cell and hydrogen technology markets in North America, Europe, and Asia. It develops, manufactures, and assembles fuel cell systems and critical components that determine the performance of hydrogen fuel cells and other energy systems. The company offers high-temperature proton exchange membrane (HT-PEM) fuel cells, including membrane electrode assemblies, bipolar plates, and reformers, as well as provides fuel-cell stack assembly and testing services. It serves stationary power, portable power, automotive, aviation, energy storage, and sensor markets. The company is headquartered in Boston, Massachusetts.

CBAK Energy Technology, Inc., together with its subsidiaries, manufactures and sells lithium batteries in Mainland China, the United States, Europe, and internationally. Its products are used in various applications, including electric vehicles, such as electric cars, electric buses, and hybrid electric cars and buses; light electric vehicles that include electric bicycles, electric motors, and sight-seeing cars; and electric tools, energy storage, uninterruptible power supply, and other high power applications, as well as cordless power tools. The company was formerly known as China BAK Battery, Inc. and changed its name to CBAK Energy Technology, Inc. in January 2017. CBAK Energy Technology, Inc. was incorporated in 1999 and is based in Dalian, China.

Sono-Tek Corporation designs and manufactures ultrasonic coating systems for applying on parts and components for the microelectronics/electronics, alternative energy, medical, industrial, and research and development/other markets worldwide. The company also designs and manufactures custom-engineered ultrasonic coating systems; and provides nozzles and generators for manufacturers' equipment. Its products include integrated multi-axis coating systems, integrated coating systems, fluxing systems, OEM systems, and other related systems. In addition, the company provides surface coating solutions and application consulting services. It markets and distributes its products through direct sales personnel, select independent distributors, and sales representatives. The company was incorporated in 1975 and is based in Milton, New York.

Ultralife Corporation, together with its subsidiaries, designs, manufactures, installs, and maintains power, and communication and electronics systems worldwide. The company operates in two segments, Battery & Energy Products and Communications Systems. The Battery & Energy Products segment offers lithium 9-volt, cylindrical, thin lithium manganese dioxide, rechargeable, and other non-rechargeable batteries; lithium-ion cells, multi-kilowatt module lithium-ion battery systems, and uninterruptable power supplies; and rugged military and commercial battery charging systems and accessories, including smart chargers, multi-bay charging systems, and various cables. The Communications Systems segment provides communications systems and accessories to support military communications systems, such as radio frequency amplifiers, power supplies and cables, connector assemblies, amplified speakers, equipment mounts, case equipment, man-portable systems, and integrated communication systems for fixed or vehicle applications comprising vehicle adapters, vehicle installed power enhanced rifleman appliqué systems, and SATCOM systems. This segment's military communications systems and accessories are designed to enhance and extend the operation of communications equipment, such as vehicle-mounted, manpack, and handheld transceivers. The company sells its products under the Ultralife, Ultralife HiRate, Ultralife Thin Cell, Ultralife Batteries, Lithium Power, McDowell Research, AMTITM, ABLETM, ACCUTRONICS, ACCUPRO, ENTELLION, SWE Southwest Electronic Energy Group, SWE SEASAFE, Excell Battery Group, and Criterion Gauge brands through original equipment manufacturers, and industrial and defense supply distributors. In addition, it sells its 9-volt battery to the broader consumer market through national and regional retail chains and online retailers. It serves government, defense, and commercial sectors. The company was incorporated in 1990 and is headquartered in Newark, New York.