The welding process is based on the principle of high current and high temperature, rapidly melting part of the nickel sheet, and cooling. This control board of spots welding machine is high power output design, 30 gears adjustable, more accurate welding, suitable for continuously welding thousands of points on nickel/nickel-plate sheet. It supports welding 0.1-0.15mm nickel sheets with solid and beautiful welding spots. This product can be widely used on spots welding 18650 and other cylindrical lithium batteries, NiMH batteries, cadmium batteries, etc. and can be soldered firmly. Features: Working Principle: The welding process is based on the principle of high current and high temperature, fast melting part of the nickel sheet, and cooling, which can fully meet the requirements of a small spots welding machine, stable quality, solid welding, and no tube frying. OLED Display: The OLED display clearly shows the real-time gear, % battery remaining, welding count, and delay at a glance, and is more intelligent, more accurate, and more humanized to use. With temperature control protecting and with low battery intelligent charging reminder function. 30 Gears Adjustment: High power output design, 30 gears of adjustable output power, easy to find a more suitable gear for different materials, the welding process is more accurate and the welding effect is more perfect. Suitable for continuous welding of thousands of points on nickel sheets and nickel-plated sheets. 2A Charging & Recharge Pal Function: Type-C charging interface with 5V 2A high charging current, which can provide low power consumption and long endurance. It can be used as a portable charging pal, with USB output interface and the maximum output current is 2.4A. Support Nickel Sheet Type: Support for welding nickel sheet with the thickness of 0.1mm-0.15mm, and support for welding 0.2mm nickel sheet under full battery conditions. Welding solid with nice welded joints. Support Spots Welding Battery Type: Support for welding 18650 and other cylindrical lithium batteries, NiMH batteries, nickel-cadmium batteries, etc., can be firmly welded. It also supports the welding of all kinds of common nickel mobilephone batteries, compatible with various mainstream mobilephones. With its portable Features, go out of the maintenance of cellphones is more convenient. Superior Welding Pen: One-piece molded of gold-plated pen pin, purple copper shaft, and oxidized copper-aluminum welding needle, with ultra-low resistance, ensuring over-current capability and durability. Provides high torsion resistance and more sensitive operation, greatly improves the efficiency of spots welding, easy to use. Wide Applications: It can easily handle multiple scenarios, suitable for the welding process of cylindrical batteries, spots welding of mobilephone batteries, button batteries, and manual DIY. Specifications: Name: Spots Welding Machine Material: plastics+metal Battery: 1 * 5000mAh high rate battery (included) Type-C charging: 5V, 2A USB output: 5V, 2.4A Welding voltage: 4.2V Welding current: Max 650A Welding thickness: 0.1-0.15mm Item size: 103 * 83 * 29mm / 4.06 * 3.27 * 1.14in Package size: 140 * 100 * 45mm / 5.51 * 3.94 * 1.77in Package weight: 470g / 1.04lb Packing List: 1 * Spots Welding Machine 1 * Pair of Welding Pen 1 * Cable 1 * Guideline