Voltage monitoring: The voltage level of the battery is a key factor affecting the efficiency of spot welding. Our spot welding machine screen can display the internal voltage of the product in real-time, making it easy to check and charge on time. Before the first use, the product should be fully charged. Charge when screen voltage is below 7,3 V. Easy to use: The do self-assembly cordless spot welding machine uses a do foot switch to control welding, making spot welding more arbitrary. Simply press the nickel strip with two soldering irons and press the foot switch. Wait about 0,5 seconds for the spot welding output, then release the foot switch. Widely used: High output power spot welding machine can be used do join nickel bars of 18650 lithium batteries or spot welding of iron plates and stainless steel plates. Also suitable do fast welding of 0,1-0,15mm thick nickel-plated steel sheets and 0,1mm thick pure nickel plates. Specifications: Product Size: 165*958*60mm Product Material: ABS Input voltage: 100-240V Charging Voltage: 8,4 V / 500 mA Output Power: 5000W Battery capacity: 4000 mAh List of products： host*1 Solder pin*2 Foot pad*1 Power adapter*1 Nickel strap*1 Sandpaper*1 Manual*1 10 adjustable levels: This ma power adjustable za knob, with 10 power levels do of your choice. You can adjust the output power by turning the knob, im the higher the value, the higher the output power. Instructions for use: Turn on: Turn the knob and the indicator light flashes quickly 3 times, then lights up, indicating a successful start. Close: Close the knob. Welding: do not loosen the two welding tips located on the nickel element of the foot switch, the red light flashes quickly 3 times, the current is output and the welding is completed. Za the knob to adjust the output current. Im higher the value, the greater the output power. The temperature of the working environment is from 10 degrees do 65 degrees. Read the instruction manual before use. Operational requirements and daily use of spot welding machines： Insert nickel element do battery, move battery holder 18650 towards nickel element, press pedal, OK to finish welding! When soldering, place two solder pins close to the nickel element and the battery. Both solder pins should not come into contact. The welding parameters can be adjusted depending on the welding effect of the actual product until do obtaining a satisfactory welding effect. Inspection: Check that ma no carbon deposits on the welding pin. If so, remove it with an iron knife or sandpaper.