The SUNKKO 709-PLUS Spot Welding Machine with 70B output is a high-performance device designed for battery pack assembly, nickel strip welding, and DIY lithium battery projects. It delivers strong, precise, and reliable welds on lithium-ion cells such as 18650, 21700, and 32700. Its adjustable current settings, durable construction, and user-friendly interface make it suitable for professional workshops and hobbyist applications alike.