1.With LED digital display design, you can directly see the battery power and charge the machine in time. (Please fully charge before first use, and recharge when the voltage is lower than 7.3V). 2.The spot welder has good performance and a long service life, with a safe plastic shell, two spot welding pens with good conductivity and low contact resistance. The tip is replaceable. 3.The 5000w spot welder has adjustable output current, spot welding 0.1-0.15mm nickel-plated steel sheets and 0.1mm pure nickel sheets, which is very suitable for welding 18650 battery pack spot welding iron sheets, stainless steel sheets. 4.Just press the nickel sheet with two welding pens and step on the foot switch, wait about 0.5 seconds to output spot welding, and then release the foot switch. 5.Light weight, portable design, the body is 6.5x3.86x2.36 inches, you can use this machine in different occasions. Name: 5000W high-power spot welder Working temperature: 10°C-65°C Power supply: AC100-240V 50/60Hz Display: 0.28-inch digital tube Charging voltage: 8.4V/500ma Battery capacity: 4000mAh Output power: 5000W Welding thickness: 0.1-0.25mm Note: 1. Avoid using while charging, otherwise it is easy to damage the battery. 2. When the temperature of the soldering pen is too high, please use it after cooling. 3. Please charge it in time when the voltage is lower than 7.3V. 4. Please use it in an ambient temperature between 10 degrees and 65 degrees. No water is allowed. Please understand the operating instructions before using this machine. Precautions for use: 1. Place the nickel sheet on the lithium battery, use the 18650 battery clamp to move and align the nickel sheet, and press the foot pedal to complete the welding. 2. When welding, be sure to press the nickel sheet and the battery