Feature: 1. Aluminum Alloy: This mini spot welder adopts aluminium alloy casing, which is wear resistant and broken resistant. 2. Flexible Pen: This spot welder machine adopts gold plated pen for flexible operation and control. It can be applicable to weld iron, steel, stainless steel sheets with the thickness less than 0.12 mm/ 0.007 inch to other iron, steel, stainless steel. 3. Scope of 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. 6 Grades Adjustable: This portable spot welder provides adjustable output power of 6 grades, more accurate welding and more stability welding. 5. Overheating Protection: This mini spot welder features overheating protection, it automatically cuts off power when the overheating occurs. It also contains over charge, over discharge and overheating protection. Specification: Item Type: Mini Spot Welder Material: Aluminum Alloy Battery: Lithium Battery (Inbuilt Battery) Battery Model: 18650 Battery Capacity: 5300mAh Power Gear :6 Grades Adjustable Voltage: 3.7V Trigger Delay Time :0.6 Seconds Charger: 5V1A, Current Shall Not Be Less Than 1A. Package List: 1 x Mini Spot Welder1 x Charging Cable1 x Roll of Aluminium Sheet2 x Heat Shrinkable Tubing