Feature: 1. INTELLIGENT LOGIC CONTROL CHIP: Spot welder control board adopts intelligent logic control chip to intelligently calculate battery power and eliminate tube blowing. 2. FOUR WAY LED DISPLAY: Spot welder pen control board adopts four way LED display, integrating four functions of capacity, multiplier, gear and power warning. 3. SUPPORT WELDING 0.1‑0.3MM NICKEL CHIP: Spot welder pen PCB circuit board supports welding 0.1‑0.3mm nickel sheet, six welding gears, and welding current 100A‑900A. 4. WELDING BATTERY TYPE: Spot welder circuit board is suitable for spot welding 18650 26650 32650 and other cylindrical lithium batteries, NiMH batteries, cadmium nickel batteries, etc. 5. COMMONLY USED POWER SUPPLY: Spot welder control board is commonly used to supply power for model batteries, car starter batteries, high rate lithium batteries and other lithium batteries. Specification: Item Type: Spot Welder Pen PCB Circuit Board Material: PCB, Red Copper Working Voltage: 6.5V-16V Thickness Of Welded Nickel Sheet: 0.1-0.3mm/0.004-0.012in (Related To Battery Discharge Energy) Common Power Supply: Model Batteries, Car Starter Batteries, High Rate Lithium Batteries, Lead Acid Batteries, High Rate Lithium Iron Phosphate And Other Lithium Batteries Welding Battery Type: Applicable To 18650 26650 32650 And Other Cylindrical Lithium Batteries, NiMH Batteries, Cadmium Nickel Batteries, Etc.. Package List: 1 x Spot Welder Pen PCB Circuit Board2 x Spot Welding Line2 x Power Cord2 x Rubber Sleeve1 x Nickel Sheet6 x Screw6 x Nut1 x Instruction Manual