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Arotech Corporation provides defense and security products worldwide. The company's Training and Simulation division develops, manufactures, and markets multimedia and interactive digital solutions for engineering, use-of-force training, and operator training of military, law enforcement, security, emergency services, and other personnel. This division offers simulators, systems engineering support, and software products for training vehicle operators to the United States military, government, municipalities, and private industry; weapon simulations used to train military pilots, weapon employment information used in air launched weapons, and part-task simulators to train aircrew; specialized use-of-force training simulators and systems for police, security personnel, and the military under the MILO Range trade name; and consulting and development support services under the Realtime Technologies trade name. Its Power Systems division provides electronics engineering and design, system integration, rapid prototyping, and vertically production services for military, aerospace, and industrial customers, including hybrid power generation systems, smart power subsystems for military vehicles and dismounted applications, and aircraft and missile systems support for weapons and communications technologies. This division also develops and sells rechargeable and primary batteries, and smart chargers to the military and medical markets, and to private defense industry under the Epsilor name. In addition, it develops, manufactures, and markets primary batteries, rechargeable batteries, and battery chargers for the military; and produces water-activated lifejacket lights for commercial aviation and marine applications under the Electric Fuel name. The company was formerly known as Electric Fuel Corporation and changed its name to Arotech Corporation in September 2003. The company was incorporated in 1990 and is based in Ann Arbor, Michigan.

FuelCell Energy, Inc., together with its subsidiaries, manufactures and sells stationary fuel cell and electrolysis platforms that decarbonize power and produce hydrogen. The company provides various configurations and applications of its platform, including on-site power, utility grid support, and microgrid, as well as distributed hydrogen; solid oxide-based electrolysis; solutions for long duration hydrogen-based energy storage and electrolysis technology; and carbon capture, separation, and utilization systems. It also offers technology to produce electricity, heat, hydrogen, and water. In addition, the company provides turn-key solutions, including development, engineering, procurement, construction, interconnection, and operation services. It serves various markets, including utilities and independent power producers, industrial and process applications, education and health care, data centers and communication, wastewater treatment, government, commercial and hospitality, microgrids, manufacturing, industrial hydrogen, port, oil and gas, wind and solar projects, food and beverage, hydrogen for mobility and material handling, and hydrogen fuel for heat, as well as engineering, procurement, and construction firms. The company primarily operates in the United States, South Korea, and Europe. FuelCell Energy, Inc. was founded in 1969 and is headquartered in Danbury, Connecticut.

Maxwell Technologies, Inc. develops, manufactures, and markets energy storage and power delivery products worldwide. The company offers ultracapacitor cells, multi-cell packs, modules, and subsystems that provide energy storage and power delivery solutions for the automotive, grid energy storage, wind, bus, industrial, and truck industries; and lithium-ion capacitors, which are energy storage devices designed to address various of applications in the rail, grid, and industrial markets. It also provides dry electrode manufacturing technology; and high voltage's CONDIS capacitor products, such as grading and coupling capacitors, electric voltage transformers, and metering products that are used to ensure the safety and reliability of electric utility infrastructure and other applications involving transport, distribution, and measurement of high-voltage electrical energy. Maxwell Technologies, Inc. markets and sells its products through direct and indirect sales channels to integrators and OEMs for use in a range of end products. The company was formerly known as Maxwell Laboratories, Inc. and changed its name to Maxwell Technologies, Inc. in 1996. Maxwell Technologies, Inc. was founded in 1965 and is headquartered in San Diego, California.

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.