{"product_id":"spot-welder-portable-18650-55422","title":"FNIRSI SWM-20 Portable Spot Welder Double Pulse Battery Welding Machine 18650 Battery DIY Pack Welding Tool 0.4mm Nickel Chip","description":"\u003cp\u003eAzabooti presents the spot welder for on the go use, a portable welder designed for 18650 and 21700 packs. This 1200A double pulse welding machine delivers precise, reliable nickel welding with compact portability.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eUnleash strong, reliable welds on the go with the FNIRSI SWM-20 Portable Spot Welder — your powerful, pocketable solution for building 18650\/21700 battery packs and quick cell repairs.\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eExperience precision welding with the SWM-20’s dual-pulse technology and up to 1200A output, delivering clean, robust spots with minimal oxidation. The integrated 2.4-inch color display puts real-time parameters at your fingertips, while the precision encoder knob lets you dial in pre-heat, interval, and pulse width with surgical accuracy. This tool is designed for serious hobbyists and professionals who need dependable performance in a compact package.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eTop features at a glance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eAdvanced Double Pulse Technology for industrial-grade welds — pre-heat and main pulse work together to produce stable, strong spots and reduce sparking.\u003c\/li\u003e\n \u003cli\u003e2.4\" HD color display with a tactile encoder for intuitive parameter tuning — see pre-heat, interval, and pulse width in real time.\u003c\/li\u003e\n \u003cli\u003eWelding range from 0.1mm to 0.4mm with 4 preset combination levels and adjustable continuous spotting (1–9 dots).\u003c\/li\u003e\n \u003cli\u003e2-in-1 design: powerful spot welder and 5000mAh USB-C power bank with 5V\/2.1A charging for on-the-go devices.\u003c\/li\u003e\n \u003cli\u003eErgonomic, compact form factor with safety features to prevent overheating during long sessions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThis tool is ideal for assembling battery packs, repairing nickel, iron, and stainless steel sheets, and performing meticulous spot welding work in tight spaces. Its 1200A max output ensures you get robust welds even on demanding packs, while the built-in power bank keeps you connected when you’re off the grid.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat you can expect in use\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eStable double-pulse welding for consistent results across varied pack configurations.\u003c\/li\u003e\n \u003cli\u003eClear visual feedback from the display for precise control during long sessions.\u003c\/li\u003e\n \u003cli\u003ePortable, pocket-friendly design with a robust build for field repairs and workshop use.\u003c\/li\u003e\n \u003cli\u003eSafe operation with integrated cooling and overheating protection.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe SWM-20 is engineered for DIY enthusiasts and professionals who demand reliable performance without sacrificing mobility. Whether you’re building new battery packs for power tools, ebikes, or portable electronics, you’ll appreciate the compact form factor, ease of use, and dependable weld quality this device delivers.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eCare and maintenance\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n \u003cli\u003eKeep contacts clean and free of oxidation for best welding performance.\u003c\/li\u003e\n \u003cli\u003eFollow safe charging practices for the built-in battery; use only the supplied or compatible 5V\/2.1A charger.\u003c\/li\u003e\n \u003cli\u003eAvoid prolonged continuous welding on high settings; allow cooling periods as needed.\u003c\/li\u003e\n \u003cli\u003eStore in a dry, ventilated area away from moisture and extreme temperatures.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"product-desc-images\"\u003e\n \u003cimg src=\"\/uploads\/products\/9045\/description\/desc_1_c4636a0e92d899c9dfcd7cae5bccb31b.jpg\" alt=\"FNIRSI SWM-20 Portable Spot Welder Double Pulse Battery Welding Machine 18650 Battery DIY Pack Welding Tool 0.4mm Nickel Chip\" loading=\"lazy\"\u003e\n\u003c\/div\u003e\n\u003ch2\u003eFeatures\u003c\/h2\u003e\u003cul\u003e\n\u003cli\u003eEnable portable welding with double pulse precision\u003c\/li\u003e\n\u003cli\u003eDial pre-heat and pulse width for stable spots\u003c\/li\u003e\n\u003cli\u003eView real time settings on 2.4\" display\u003c\/li\u003e\n\u003cli\u003eWelds 0.1–0.4mm nickel with minimal oxidation\u003c\/li\u003e\n\u003cli\u003eSupports 18650 21700 battery pack creation\u003c\/li\u003e\n\u003cli\u003eCompact tool for battery pack repair on the go\u003c\/li\u003e\n\u003cli\u003eUSB C power input for versatile charging\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003eSpecifications\u003c\/h2\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003eMaterials:\u003c\/strong\u003e nickel, iron, stainless steel\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003eFrequently Asked Questions\u003c\/h2\u003e\u003ch3\u003eWhat kind of batteries can this welder handle?\u003c\/h3\u003e\u003cp\u003eIt is designed for 18650 and 21700 cells and nickel strip welding. Use the double pulse to achieve strong spots with minimal heat damage. Always follow safety guidelines and electrode recommendations.\u003c\/p\u003e\u003ch3\u003eDoes it require special power or accessories?\u003c\/h3\u003e\u003cp\u003eThe SWM-20 supports USB C power and typical high current adapters. Ensure your power source meets the device's current needs and use appropriate nickel strips and connectors for best results.\u003c\/p\u003e\u003ch3\u003eIs this suitable for DIY battery pack projects?\u003c\/h3\u003e\u003cp\u003eYes, the FNIRSI SWM-20 is built for DIY battery pack assembly and repairs. It offers precision control, real time parameter readouts, and compact portability for field work.\u003c\/p\u003e\u003cscript type=\"application\/ld+json\"\u003e{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"What kind of batteries can this welder handle?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It is designed for 18650 and 21700 cells and nickel strip welding. Use the double pulse to achieve strong spots with minimal heat damage. Always follow safety guidelines and electrode recommendations.\"}},{\"@type\":\"Question\",\"name\":\"Does it require special power or accessories?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The SWM-20 supports USB C power and typical high current adapters. Ensure your power source meets the device's current needs and use appropriate nickel strips and connectors for best results.\"}},{\"@type\":\"Question\",\"name\":\"Is this suitable for DIY battery pack projects?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Yes, the FNIRSI SWM-20 is built for DIY battery pack assembly and repairs. It offers precision control, real time parameter readouts, and compact portability for field work.\"}}]}\u003c\/script\u003e","brand":"Azabooti","offers":[{"title":"SWM-20","offer_id":48907234672889,"sku":"INS-999955422-F0E77132","price":96.24,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0813\/7644\/4665\/files\/f3053d9ae2d2079289044fa3b68c4e46.jpg?v=1787838649","url":"https:\/\/azabooti.com\/products\/spot-welder-portable-18650-55422","provider":"Azabooti","version":"1.0","type":"link"}