DIY Spot Welder Handheld Portable Mini Spot Welding Machine With Spot Welding Pen Nickel Strip 18650 Battery Spot Welder ,Easy to Use

1.9 gears power adjustable 2.2A high current charging, fast charging speed 3.Power bank USB output function (5V MAX2.4A) 4.Replaceable welding pin, one-piece welding pen, welding will not be hot 5.Program update, more user-friendly operation