DC 12V 18650 Lithium Battery Spot Welder DIY Kit 5MOS Spot Welding Machine PCB Circuit Board Nickel Sheet 9 Gears Output PowerPure copper conducts electricity and heat to improve spot welding efficiency.Aluminum oxide copper spot welding needle ensures high current carrying capacity and durability.The and marks are not easy to connect wrong wires.High frequency capacitance, low internal resistance, high temperature resistance.9 gear power regulation, digital tube real-time display gear.Specifications:Name: spot welder suitMaterial: PCBWorking voltage: 6.5-16VWorking current: 20maStandby power consumption: 0.5maRecommended operating temperature: - 10 to 60 Voltage: 12.0VWelding current: 1700A MaxWelding thickness: 0.1-0.3mmThe following battery packs can be used as working power:12V automobile starting power supply, model 3S high magnification battery pack, three series high magnification lithium battery pack, super capacitor polymer high magnification battery40900 3-string battery pack, lead-acid battery with good performance above 12V 20A.Calculation formula: capacity X discharge rate=load capacityTake 4000ma aviation model battery as an example, the discharge rate is 45C(4AX45C=180A)Instructions:Function keys: 1, used to switch the machine, 2, used to switch gears!When the power is on, you need to press once to start the machine. The default is 0. Press and hold the button for 1 second to releaseWhen the gear is increased by one gear, the buzzer sounds and the LED lamp flashes corresponding to the gear.For example, in gear 3, the buzzer sounds 3 times, and the LED flashes 3 times. There are 9 gears in total. Spot weld 0.1-0.15 from gear 1 to gear 5,Weld 0.2 for gear 5-7 and 0.25-0.3 for gear 8-9. Press and hold the button again for about 3 seconds. It will lose power. Under the power off state, press the power on button for a short time, and the gear will return to 0Packing list without case:1 x Control board2 x Input cable2 x Soldering pen4 x Screw1 x Nickel sheetPacking list with enclosure:1 x Control Board2 x Input Cables2 x Soldering pens4 x Screws1 x Nickel plate2 x Acrylic enclosure8 x brass posts4 x Screws