Feature: 1. [Dual Pulse Welding] The use of dual pulse spot welding technology makes welding more stable. Weldable thickness 0.1 to 0.25mm, maximum welding current 1200A, 4 combination gear adjustment. 2. [1.8 Inch Color LCD] Users can clearly know the internal temperature, charging status, remaining battery, gear position, and time interval, easily understand the working status. 3. [Welding Pen] Composed of multiple high temperature wires, with good conductivity, strong torsion resistance, low contact resistance, safe use, compact and portable. 4. [Rechargeable Design] Built in 5000mAh rechargeable battery, coms with C type charging cable, this spot welder can be fully charged within 3 hours and can continuously weld thousands of points after being fully charged. Can be used as a power bank to charge mobile phones. 5. [Widely Used] This spot welder is suitable for spot welding ni sheets, iron sheets, stainless steel sheets, aluminum sheets, and is mainly used for welding cylindrical ni sheets, NI MH batteries, 18650 and other ni cd batteries. Specification: Item Type: Battery Spot Welder Material: ABS Battery: 1 x 5000mAh Rechargeable Lithium Battery (Built in) Charging: 5V 2.1A Discharge: 5V 2.1A Welding Materials: Ni Sheet, Iron Sheet, Stainless Steel Sheet, Aluminum Sheet Welding Thickness: 0.1-0.25mm Maximum Welding Current: 1200A. Package List: 1 x Battery Spot Welder2 x Welding Pens1 x USB Cable3 x Accessories1 x Instruction Manual