BTL-02 Adjustable 30 Gears Mini Spot Welding Machine with Quick Release Pen 0.2mm Nickel Plate 18650 Battery Welder Spot Welder BTL-02 Adjustable 30 Gears Mini Spot Welding Machine with Quick Release Pen 0.2mm Nickel Plate 18650 Battery Welder Spot Welder. Sale price : $41.00 Category : Tools