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

9 gears power adjustable 2A high current charging, fast charging speed Power bank USB output function (5V MAX2.4A) Replaceable welding pin, one-piece welding pen, welding will not be hot Program update, more user-friendly operation