Magnevolt is a provider of water-activated batteries, specializing in supplying superior products to the United States Armed Forces since 1986. Their batteries are designed for harsh environments and are popular in commercial oceanic applications and military use due to their high-energy density, long shelf-life, and low-temperature performance. Magnevolt designs and produces seawater-activated batteries for various purposes including torpedo propulsion, sonobuoy powering, and air rescue equipment. They offer custom battery design and manufacturing services tailored to specific requirements, ensuring high-quality performance in extreme conditions.