Features: 1.LCD SCREEN: The portable spot welder is designed with LCD screen, you can see the power, gear, delay, voltage and mode on the LED display of the welder with a total of 5 data. 2.DUAL MODE: Battery spot welder can be switched automatically and manually, 80 levels of power adjustable, short press button control. 3.MULTIPLE PROTECTION: The portable spot welder has perfect overcharge, overdischarge, overtemperature and other protection functions and double protection performance. The unique overheat protection device automatically cuts off the power when overheating occurs. 4.APPLICATION: Spot welder is suitable for 18650 and other cylindrical lithium batteries, NiMH and CdNi batteries can be welded firmly. Also can be used to weld iron, steel, stainless steel plate with thickness less than 0.2mm/0.007 inch to other iron, steel, stainless steel materials. 5.5000MAH BATTERY: Handheld spot welder pen has built in 5000mAh high capacity battery, the highest output current is up to 800A, fully charged can weld more than 800 times continuously. specification:Item Type: Portable Spot Welder Machine Material: Metal Product Size: Approx. 25.1 x 5.8 x 2.5cm / 1.0 x 0.23 x 0.1in Current: 800A (Maximum) Input Connector: Type C Input Parameters: 5V 2.1A Levels: 80 Adjustable Dual Mode Selectable: Automatic and Manual Switching LCD Display: Power, Gear, Time Delay, Voltage, Mode Support Thickness Approx. 0.1-0.2mm / 0.004-0.007in Nickel Sheet Welding, One Handed Can Hold Battery Capacity: 5000mah Lithium Battery (Ship with Inbuilt Battery) PackageList: 1 x Spot Welder (Ship with Inbuilt Battery) 1 x Charging Line 1 x Nickel Sheet 1 x User Manual