The welding process is based on the principle of high current and high temperature, rapidly melting part of the nickel sheet, and cooling. This spots welding machine is 8000W high power design, output power adjustable for more accurate welding, suitable for continuously welding thousands of points on nickel/nickel-plate sheet. It supports welding 0.1-0.3mm nickel sheets with solid and beautiful welding spots. This product can be widely used on spots welding 18650 lithium batteries, cellphone batteries, and can be soldered firmly. Specifications: Material: printed circuit board Type: pedal type, automatic welding type (optional) Battery: 1 * built-in 9600mAh battery (included) Input voltage: 100-240V Output voltage: 8.4V Welding current: 1200A Power: 8000W