We develop high-pressure resistant, waterproof, anti-corrosion, wide-temperature-range and high-stability special lithium batteries for special marine equipment such as deep-sea detection equipment, underwater operation robots, ocean monitoring terminals and deep-sea exploration equipment. The batteries can adapt to extreme working conditions including deep-sea high pressure, high humidity and low temperature, featuring long endurance and high safety, and provide reliable power support for deep-sea industrial operations and marine resource exploration.