ETEKWARE’s lithium-ion marine battery is the best type of deep cycle marine battery for your boats. Our lithium-ion marine batteries are designed to charge quickly, store safely, and can withstand very high & low temperatures and brutal conditions. Powered by safe and sustainable lithium-ion batteries, your boats will enjoy robust storage capacity, longer life cycles, higher discharge power, and less charging time. Our lithium boat batteries can be used for yachts, sailboats, catamarans, and other maritime applications.