Professionally provide lithium battery retrofitting solutions for upgrading lead-acid batteries of various equipment, suitable for replacement and upgrade of traditional lead-acid equipment such as electric forklifts, AGV equipment, energy storage devices, mobility vehicles and industrial backup power supplies. Compared with traditional lead-acid batteries, lithium battery solutions feature light weight, long service life, long endurance, maintenance-free, pollution-free and high charge-discharge efficiency. They can help enterprises reduce operation and maintenance costs, improve equipment operating efficiency, and realize energy-saving upgrading and renovation of old equipment.