Description:    This mini pulse spot welder is suitable for welding lithium battery easily and quickly. It is applicable to repair, home DIY and more welding needs. Perfect Household or Outdoor Portable Pulse Spot Welder    Features:  Mini pulse spot welder with large output curent is suitable for welding 0.1-0.2mm nickel sheet, iron sheet and stainless steel quickly.  Easy to operate, 2 welding methods of spot welding or butt welding. 4 gears adjustable, freely switching according to practical needs.  Equipped with 2 mobile welding pens, easy to install, 30cm/ 11.8in length allows long welding range and meets various welding needs.  5300mAh large-capacity lithium rechargeablebattery, easy to charge via Type-C port. Portable and lightweight, space-saving in home, easy to carry outside.  The shell is made of hard aluminum alloy, sturdy and durable, has long service life. Applicable to home use, DIY, maintenance, etc.  Specifications:  Color: Black  Material: Hard Aluminum Alloy  Output Voltage: Max. 4.2V  Output Current: Max. 500A  Input: 5V/ 2.1A  Applicable to: 0.1-0.2mm Nickel Sheet, Iron Sheet, Stainless Steel  Charging Voltage: 4.5~5.5V (Current≥2.5A)  Built-in Battery: 1 * 3.7V 5300mAh Lithium Battery  Main Machine Size: 15 * 8 * 2cm / 5.91 * 3.15 * 0.79in  Welding Pen Length: 30cm / 11.81in  Net Weight: 435g / 15.34oz  Package Size: 18 * 11 * 5cm / 7.09 * 4.33 * 1.97in  Package Weight: 485g / 17.12oz    Package List:  1 * Main Machine  2 * Welding Pen (30cm)  1 * USB Cable (Type-C)