Mini Spot Welding Machine 0.05-0.2mm Nickel Strip for DIY 18650 21700 Lithium Battery Portable Adjustable 99 Gears Spot Welder with Digital Display Tool KitDescription:This is a high-quality spot welding machine control board. This spot welding machine can be used for spot welding of 14650/17490/18650/21700/26650/32650 lithium cylindrical batteries and nickel-metal hydride batteries. Feature:Using 5 MOS tubes, the maximum current can reach 2390A. High power output design, 99-speed adjustable output power, more precise welding, thousands of points can be continuously welded on nickel sheet/nickel plate. Welding is the principle of using high current and high temperature to rapidly melt the nickel foil part and cool it. Equipped with 2 copper bars, which greatly increases the overcurrent capacity. The welding spot is accurate and beautiful, and supports welding of 0.05-0.2mm nickel sheet, iron sheet and stainless steel sheet. This spot welding machine can be used for spot welding of 14650/17490/18650/21700/26650/32650 lithium cylindrical batteries and NiMH batteriesSpecification:Material: PCB + electronic componentsSize: 80*45mm/3.15*1.77''Can spot weld 0.05-0.2mm nickel plated sheetPower supply battery requirements:-Old lead-acid battery 12V20AH-100AH (new battery can not exceed 45AH), 20AH can not exceed 1 year, more than one year needs a larger capacity.-or: 4-5 strings of super Farad capacitors-or: large cell (iron lithium battery)Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. 1 x Mini Spot Welding Machine