Feature: 1. Aluminum Alloy: This mini spot welder adopts aluminium alloy casing, which is anti impact and wear resistant. 2. 15.7in Soldering Pen: This spot welder machine comes with 15.7 inch spot soldering pen, which makes operation more flexible. 3. Wide Application: This portable battery welder is suitable for 18650 and other cylindrical lithium batteries, nickel metal hydride batteries, cadmium nickel batteries can be welded firmly. 4. Easy Operation: This spot welder supports nickel sheet spot welding with the thickness 0.1 to 0.12mm. It can be used to weld iron, steel, stainless steel sheets with the thickness less than 0.2 mm/ 0.007 inch to other iron, steel, stainless steel. 5. Multiple Protection: This mini spot welder automatically cuts off power when the temperature exceeds 60℃, and it possesses over charge, over discharge, over temperature etc protection functions and double protection. Specification: Item Type: Mini Spot Welder Material: Aluminum Alloy Length of Spot Soldering Pen: Approx. 400mm / 15.7in Battery: Lithium Battery (Inbuilt Battery) Battery Capacity: 7500mAh Battery Model: 18650 Output Voltage: 4.2V(Maximum) Output Current: 650A(Maximum) Design Current: 1000A(Maximum) Input Port: Type C Charging Port Input Parameter: 5V/2A Recommended Nickel Sheet Thickness: About 0.1 to 0.12mm. Package List: 1 x Mini Spot Welder2 x Spot Soldering Pen1 x Data Cable1 x Roll of Aluminium Sheet1 x User Manual