Mini Spot Welding Machine 0.05-0.2mm DIY Nickel Strip 18650 21700 Lithium Battery Portable Adjustable 99 Gears Spot Welding Machine 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 cylindrical lithium batteries 14650/17490/18650/21700/26650/32650 and nickel-metal hydride batteries. Feature: Using 5 MOS lamps, the maximum current can reach 2390A. High power output design, 99-speed adjustable power output, more precise welding, thousands of points can be continuously welded on nickel sheet/nickel strip. Welding is the principle of using high current and high temperature to quickly melt the nickel foil part and cool down. Equipped with 2 copper rods, which greatly increase the overcurrent capacity. The welding site is accurate and beautiful, and it supports welding of 0.05-0.2mm nickel plate, iron plate and stainless steel plate. This spot welding machine can be used for spot welding of cylindrical lithium batteries 14650/17490/18650/21700/26650/32650 and NiMH batteriesSpecification:Material: PCB + electronic componentsSize: 80*45mm/3.15*1.77''Can spot weld nickel plated sheet 0.05-0.2mmPower backup battery requirements:- Old lead acid battery 12v20ah-100ah (new battery can not exceed 45AH), 20AH can not exceed 1 year, more than one year need larger capacity.- Or: 4-5 strings super Farad capacitors- Or: big cell (lithium iron battery)Note:Due to the different monitor and light effect, the actual color of the item may be slightly different from the color showed on the pictures. Please allow 1-2cm measuring deviation due to manual measurement.1 x Mini Spot Welding Machine