Using 5 MOS tubes, the maximum current can reach 2390A. High power output design with 99-speed adjustable output power for more precise welding; capable of continuously welding thousands of points on nickel sheet or nickel plate. Welding operates on the principle of using high current and high temperature to rapidly melt the nickel foil and then cool it. Equipped with 2 copper bars to greatly increase overcurrent capacity. Welding spot is accurate and clean, supporting welding of 0.050.3mm nickel, iron, and stainless steel materials. This spot welding machine is suitable for spot welding 14650, 17490, 18650, 21700, 26650, 32650 lithium cylindrical batteries and NiMH batteries. Color: purple Material: PCB Package Contents: 1 x Control Board Note: Light and display differences may cause slight variations in color between the image and the actual item. Measurement allows an error of +/- 13 cm.