Type1 This control board of spots welding machine is high power output design, 99 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 cylindrical lithium batteries and nickel metal hydride batteries such as 14650/17490/18650/21700/26650/32650 etc. Features: The welding process is based on the principle of high current and high temperature, rapidly melting part of the nickel sheet, and cooling. Adopt 5pcs MOS tubes, and the maximum current is up to 1700A; there are 5 MOS tube locations reserved on the back of the printed circuit board for DIY players to increase their own MOS tubes. High power output design, 99 gears of output power adjustable, more accurate welding, suitable for continuously welding thousands of points on nickel/nickel-plate sheet. With the digital tube real-time gear display function, 0-99 gears, 1-gear is the lowest, 99-gear is the highest, and the gears are gradually increasing. It supports 0.1-0.3mm nickel welding sheets with solid and beautiful welding spots. This product can be widely used on spots welding cylindrical lithium batteries and nickel metal hydride batteries such as 14650/17490/18650/21700/26650/32650 etc. 8 square welding pen, 10AWG wire consists of multiple strands of high-temperature wire with high torsional resistance and more sensitive operation. Thickened pure copper welding pen design, with alumina copper spots welding needles to ensure high current passing capacity and durability. The cold pressing process can make large contact areas with pure copper joints to reduce internal resistance. Optional Housing: Transparent protective housing, beautiful and safer, prevents short-circuiting damage to the control board due to leaks from exposed component. Note: The switching power supplies, transformer, chargers, water batteries, and rechargeable batteries are not allowed to be used as power supplies! Specifications: Name: Spots Welding Machine Set Material: printed circuit board Type: with housing, without housing (optional) Working voltage: 6.5-16V Working current: 20ma Standby power consumption: 0.5ma Recommended working temperature: -10 to 60 Voltage: 12.0V Welding current: 1700A Max Welding thickness: 0.1-0.3mm Capacity: 20AH-80AH (new battery not more than 45AH, more than 45AH please consulting our customer service for current limiting method) or: 4-5 strings of super-Farah capacitors Item size: 90 * 60mm / 3.54 * 2.36in Package size: 120 * 120 * 20mm / 4.72 * 4.72 * 0.79in Package weight: 180g / 6.35ounce Packing List (without housing): 1 * Control Board 2 * Input Cable 1 * Pair of Welding Pen 2 * Heat Shrink Tubing 6 * Screw 1 * Nickel Sheet 1 * Guideline OR Packing List (with housing): 1 * Control Board 2 * Input Cable 1 * Pair of Welding Pen 2 * Heat Shrink Tubing 6 * Screw 1 * Nickel Sheet 1 * Housing Kit 1 * Guideline Type2 This control board of spots welding machine is high power output design, 99 gears of output power adjustable, more accurate welding, suitable for welding thousands of points on nickel/nickel-plate sheet continuously. With the 3 bit digital-tube real-time gear display function, which not only can display the current gear, but also can detects the battery voltage. Three working modes design, you can switch between general power mode, strengthen power mode and superstrong power mode. It supports 0.1-0.2mm nickel welding sheets and the welding points are more solid and beautiful. Features: The welding process is based on the principle of high current and high temperature, rapidly melting part of the nickel sheet, and cooling. High speed singlechip design, intelligent program, real-time display of battery voltage and high visibility of spots welding strength. Adopts 8pcs MOS tubes, the peaks current is up to 2400A, support 0.1-0.2mm nickel welding sheets and the welding points are more solid and beautiful. High-precise power output design with 99 gears output power is adjustable for more accurate welding, and is suitable for welding of thousands of points on nickel sheet and nickel-plate sheet continuously. With the 3 bit digital-tube real-time gear display function, which not only can display the current gear, but also can detects the battery voltage, and enhances the pleasure of the spots welding. When in standby, the digital tube will alternately display the gear and the supplying voltage once every second. When the display reads: d + two digits, means it is under gear display; when the display reads: three digits, such as 12.6, means that the voltage of the power supplys is: 12.6 V voltage. Three working modes design, you can switch between genera