FNIRSI SWM-20 1200A Dual Pulse 2-in-1 Portable Battery Smart Spot Welder

The FNIRSI SWM-20 is a compact and powerful handheld spot welding machine that combines high current welding performance with the convenience of a built in power bank. Designed for battery tab welding, battery pack assembly, metal sheet joining and precision spot welds, it is ideal for electronics workshops, repair technicians, DIY makers and portable field work.

Thanks to dual pulse welding technology and a maximum welding current of 1200A, the SWM-20 delivers strong, clean and consistent welding results. Its 2.4″ TFT color display provides clear, real time information about voltage, temperature and welding parameters, while the rotary encoder allows fast and precise adjustment. With more than 10,000 fine adjustment levels, adjustable welding parameters and eight integrated safety protections, the SWM-20 is both powerful and user friendly.

Highlights:

• Portable intelligent spot welding machine with clear TFT display.
• Dual pulse technology for clean, firm and stable welds.
• Maximum welding current of up to 1200A.
• Built in 5000mAh battery with long runtime.
• Supports up to approximately 1,500 welding cycles per charge.
• Functions as a power bank with USB output.
• Large 2.4″ TFT color display with real time monitoring.
• Rotary encoder for fast and precise parameter adjustment.
• More than 10,000 fine welding adjustment levels.
• Customizable welding settings including preheat, pulse, interval and continuous welding points.
• Detachable welding pens with high conductivity pure copper tips.
• Eight integrated safety protection functions.
• Four preset welding level combinations for versatile use.

Specifications:

General

• Model: FNIRSI SWM-20.
• Battery Capacity: 5000mAh.
• Charging Input: 5V / 2.1A.
• USB Output: 5V / 2.1A (power bank).
• Charging Interface: USB-C.
• Display: 2.4″ TFT color display.
• Control Method: Rotary encoder knob.
• Protection: Over temperature, under voltage, overcharge, over discharge, short circuit, voltage stabilization, low temperature and impact protection.
• Adjustable Gear Levels: 4 preset combination levels.
• Fine Adjustment Levels: More than 10,000.
• Welding Cycles: Up to approximately 1,500 per charge.
• Automatic Shutdown: Adjustable from 0-99 minutes.
• Firmware Upgrade: Supported through USB-C.
• Dimensions: ~134×87×39mm.
• Weight: ~310g.

Welding Performance

• Max Welding Current: 1200A.
• Welding Thickness: 0.1-0.5mm, depending on the material.
• Nickel-Plated Steel Thickness: Up to 0.4mm.
• Steel Thickness: Up to 0.5mm.
• Pure Nickel Thickness: Up to 0.25mm.
• Iron Thickness: Up to 0.3mm.
• Copper and Nickel-Plated Copper Thickness: Up to 0.1mm.
• Suitable Materials: Nickel, nickel plated steel, pure nickel, iron, steel, stainless steel, copper and nickel plated copper.
• Welding Technology: Dual pulse spot welding.
• Adjustable Parameters: Preheat, pulse duration, welding interval and continuous welding points.

Ideal For:

• 🔋 Precision spot welding in battery pack assembly.
• ⚡ Welding battery tabs and metal strips.
• 🛠 Electronics repair shops and DIY makers.
• 🔧 E-bike and electric scooter battery repairs.
• 📱 Mobile phone and small electronics battery replacement.
• 📦 Workshop use and portable field repairs.
• ⚙️ Projects requiring accurate and repeatable spot welds.
• 🔌 Charging USB-powered devices with the integrated power bank.