The SUNKKO 738AL Spot Welding Machine is a professional-grade device designed for battery pack assembly, nickel strip welding, and DIY lithium battery projects. It provides strong, precise, and consistent welds for lithium-ion cells such as 18650, 21700, and 32700. With adjustable welding parameters, a durable build, and a user-friendly interface, it is ideal for both hobbyists and industrial workshops.