Specification: Item Type: Spot Welder PCB Circuit Board System Voltage: 12V-14.6V Working Current: 90-150A 1. 18650/26650/32650 lithium battery( not included) can be welded, portable, stable and reliable 2. The user needs to bring his own 12V battery for power supply, and the welding current is about 90A~130A. It is easy to weld the common 0.1mm~0.12mm nickel plated sheet. 3. After several generations of product updates, it is now upgraded to automatically trigger welding, freeing fingers. Package List: 2 x Input Line 1 x Circuit Board 2 x Output Line And Soldering Pen 2 x Heat Shrink Tube 1 x Screw Resistor Accessories Set Note: 1. If the battery is good enough and the internal resistance is very low, there may be a large current overload. 2. If you are not sure about the battery, it is best to extend the cable by about 1 meter with 2.5² or 4², which can reduce the risk of burning the power tube.