Portable Pulse Spot Welder Rechargeable Mini Spot Welding Machine DIY The mini portable type spot welding machine is suitable for household daily or small amount of spot welding/touch welding work Features: Practical Spot Welding Machine: mainly used in the welding of nickel sheet of cylindrical battery like 18650/21700/32650. Support Welding: nickel sheet, iron sheet, and stainless steel within the thickness of 0.1~0.2mm. Easy Operation: Automatic trigger without the switch, free your hands or foot pedals. It will automatically shut-down after 10 minutes of no use. Aluminum Alloy Shell Material: fire-proof and anti-fall. Surface anodizing technology, anti-abrasive and safe to use. Built-in High-rate Polymer Power Cell: the maximum output current is up to 500A, and it can continuously weld thousands of points after being fully charged. Portable Size: compact size and light weight, easy and convenient to carry. Specifications: Material: Aluminum alloy Output Voltage: Max. 4.2V Output Current: Max. 500A Design Current: Max. 1000A Battery Capacity: 4300mAh Input Interface: Type-C Input: 5V, 2.1A Welding Thickness: 0.1~0.2mm Charging Voltage: 4.5~5.5V (current≥2.5A) Built-in High Rate Battery: 5000mAh 45C 3.7V Welding Pen Length: 30cm Item Size: 150 * 80 * 20mm / 5.91 * 3.15 * 0.79in Item Weight: 427g / 15.07oz Package Weight: 475g / 16.77oz Package Size: 18 * 11.5 * 5cm / 7.09 * 4.53 * 1.97in Packing List: 1 * Spot Welder 1 * Type-C Cable 2 * Spot Welding Pen