Portable Digital Color Display Spots Welding Machine Control Board for Welding Cylindrical 18650 Lithium Batterypack DIY 7-14V Battery Welding Strength Adjustable Function 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 control board has a high power output design, welding strength adjustable for more accurate welding, with solid and beautiful welding spots. Supports 7V-14V voltage, more than 200A current. Suggested power input of 12.0V 20A-200A car starting powersupply, supercapacitor 3 in series -6 in series, and aviation model battery 3S 5000mAh or above. 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】: More intelligent, accurate, and humane e, the adjustable digital display clearly shows battery voltage, current size, welding pulse, interval, and number of spotwelds at a glance. 【Adjustable Welding Strength】: With a high power output design, the encoder flexibly adjusts the welding strength, easy to find a more suitable gear for different materials, the welding process is more accurate and the welding effect is more complete. Suitable for continuous welding of thousands of points on nickel sheets and nickel-plated sheets. 【Scientific Circuit Design】: Adopting 5pcs high-power MOS, MOS boost circuit drive, ensuring MOS stability, with large current control, with big redundancy and low failure rate. Paired with 2 large filter capacitors, stable-performance anti-interference MCU, and paired with 8AWG silicone welding wire. With its portable features, go out of the maintenance of cellphones is more convenient. 【Support Input Type】: Supports voltage of 7V to 14V, current of more than 200A. Suggested power input of 12.0V 20A-200A auto starters, 3 series -6 series supercapacitors, and 3S 5000mAh or above aviation model batteries. 【Superior Welding Pen】: Flexible welding pen design, 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 e. 【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. Attention:  This product only includes the control board and elding pen, and does not include the powersupply, battery, or aircraft model battery Reverse connection of the positive and negative poles of the powersupply can burn out the control board. Specifications: Name: Control Board Material: plastics+metal Package size: 220 * 65 * 110mm / 8.66 * 2.56 * 4.33in Package weight: 314g / 11.08ounce Packing List: 1 * Control Board