1High Power: The spot welder board outputs in high power, which is 99 gears adjustable, more accurate for welding, thousands of points can be continuously welded on nickel plate. 2Applicable for: This spot welder board can be used for spot welding of lithium cylindrical batteries and nickel hydrogen batteries such as 14650 17490 18650 21700 26650 32650. 3Wide Purpose: The welded spot is accurate and beautiful, this spot welding board supports welding 0.05mm to 0.3mm nickel sheet, iron sheet and stainless steel sheet. 4Large Current: Using 5 pcs MOS tubes, the maximum current is up to 2390A, equipped with 2 brass bars, greatly increasing the over current capacity. 5Welding Principle: The welding is based on the principle of using high current and high temperature quick melting and cooling the nickel foil, efficient and effective.