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, 199 gears of output power adjustable, 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 and other cylindrical lithium batteries, NiMH batteries, cadmium batteries, etc. and can be soldered firmly. Features: Reliable Quality: Mechanical concave and convex spots welding machine, using high-power relay, through the control relay, four concave and convex electrodes collision to achieve high current discharge, so that the relay instantaneous current up to 1500A, can fully meet the requirements of small spots welding machine, stable quality, solid welding Solid welding and no tube frying. 199 Gears Adjustment: High power output design with 199 gear output power is adjustable for more accurate welding, and is suitable for continuous welding of thousands of points on nickel sheet and nickel-plate sheet. Easy to Use: Long press the rotary encoder to on/off the machine. Use the rotary encoder to adjust the welding gear (the number is flashing) click the encoder to confirm, the display is a long bright state at this time can be used to welding. Support Spots Welding Battery Type: Support for welding 32650/26650/18650/18500/17490/14650 and other cylindrical lithium batteries, NiMH batteries, etc., can be welded firmly. Support Nickel Sheet Type: Support for welding nickel sheet with the thickness of 0.1mm-0.3mm, and with solid and beautiful welding spots. Superior Welding Pen: Dedicated spots welding pen, 6 square soft silicone wire are consists of multiple strands of high-temperature wire with high torsional resistance and more sensitive operation. Copper Needle Design: With alumina copper spots welding needles, large areas with pure copper joints to reduce internal resistance, to ensure high current passing capacity and durability. Available Power Sources: 2.7V 3000F superFaraday capacitor in series with 3 charged to 8V can be welded (he maximum number of Farad capacitors is no more than 4 in series) Forbidden Power Supplys: Switching power supplys, transformers, rechargers, rechargeable battery. Note:? The firsttime you use it, please starts debugging from 1 gear, slowly upward gear, adjust to the appropriate gear to not arbitrarily increase the gear, to avoids irreversible damage to the motherboard by using too large gear. Specifications: Name: Spots Welding Machine Set Material: printed circuit board Nickel sheet welding thickness: 0.1-0.3mm Package size: 150 * 100 * 60mm / 5.91 * 3.94 * 2.36in Package weight: 450g / 0.99lb Packing List: 1 * Control Board 2 * Input Cable 1 * Pair of Welding Pen 4 * Screw Set