1.[NO Spot Welding Pen]No need for a spot welding pen when going out or at home, handheld spot welder that does not require additional spot welding pens, carry it with you and it's convenient to go anywhere. It combines the built-in power supply and welding pen into one, making it easy to weld without the need for an external welding pen. 2.[Multifunctional Battery Spot Welder Pen]This portable welder can be widely used in spots welding cylindrical lithium batteries, nickel metal hydride batteries, and nickel-cadmium batteries, such as 18650/26650/32650, etc. It supports welding 0.1-0.15mm(0.2mm under full battery condition) nickel-plated sheets, stainless iron sheets or stainless steel sheets, with solid and beautiful welding spots. 3.[80 Gears Adjustable]Dual pulse output, high power output design, 80 gears of output power adjustable, more accurate welding, suitable for continuously welding thousands of points on nickel/nickel-plate sheet. 4.[Dual Mode Spot Welder]Dual modes selectable, supports automatic and manual mode switching by your needs. The wire is consists of multiple strands of high-temperature wire with high torsional resistance and more sensitive operation.