Adopts 5pcs MOS tubes, and the max current is up to 2390A. High power output design, 99 gears of output power adjustable, more welding, and it can continuously welding thousands of points on nickle/nickelplate sheet. The welding is based on the principle of high-current and high-temperature melting the part of sheets and cooling. Equipped with 2pcs copper , which are greatly increase the overcurrent capacity. The welding spots are and beautiful, support welding 0.05-0.3mm sheet, iron sheet, stainless steel sheet. This spots welding machine can be used to spots welding cylindrical lithium batteries and -metal hydride batteries like 14650/17490/18650/21700/26650/32650 and etc.. Specifications: Name: Spots Welding Machine Control Board Type: B Material:plastic colour:As Shown Package Contents: 1 x Spot Welder Control Board Only the above package content, other are not included. Note: Light and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.