High Energy Batteries (India) Ltd (HEB) designs, manufactures and exports aircraft batteries, torpedo batteries, missile batteries, silver chloride and magnesium and lead acid batteries. It also offers silver oxide zinc, nickel cadmium and lead acid batteries. Its batteries are utilized in defence, auto and VRLA applications.

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The R&D arm of HEB focuses on designing and manufacturing of silver oxide zinc, nickel cadmium, and silver chloride magnesium batteries. Its batteries are utilized in underwater propulsion, emergency starting, control guidance, communication, and aerospace applications. It also focuses on the development of primary activated reserve type silver zinc batteries, high power Ag Zn pile battery, PAFC and PEM fuel cells, 1kW/ 10kWh vanadium redox flow battery, 2nd life lithium-ion battery, hydrogen electrolyser and PEM fuel cell. In FY2025, the company incurred expenses of INR89.1 million on R&D activities, which as a percentage of revenue, stood at 11%.