FNIRSI SWM-20 Spot Welder 1200A Dual Pulse Battery Welding Machine 0.1-0.5mm Nickel Sheet Portable 18650 Pack Welder DIY Tool

The SWM-20 Portable Handheld Spot Welder is an efficient, convenient, and highly mobile welding tool designed for precision. Featuring advanced dual-pulse technology, it ensures exceptionally stable and robust welds every time. Beyond welding, it doubles as a versatile power bank for your devices. The integrated 2.4-inch HD display provides a clear, intuitive interface, while the precision encoder knob allows for effortless and accurate parameter adjustments, significantly elevating the overall user experience.

1. Advanced Double Pulse Technology for Industrial-Grade Welds

Equipped with a powerful 1200A max output and advanced double-pulse welding technology, this tool ensures cleaner, stronger, and more consistent welds. The pre-heat and main pulse stages work together to eliminate sparks and oxidation, making it perfect for building massive 18650/21700 battery packs with professional-level stability.

2. 2.4" HD Color Display & Precision Encoder Tuning

The vibrant 2.4-inch high-definition screen provides a crystal-clear real-time view of your parameters, including pre-heat, interval, and pulse width. Combined with a tactile encoder knob, you can adjust settings with surgical precision for a much smoother, more intuitive experience than traditional button-only models.

3. Professional 0.5mm Welding Range & Customizable Gears

The SWM-20 effortlessly welds nickel, iron, and stainless steel sheets with thicknesses ranging from 0.1mm to 0.4mm.With 4 combination gear modes and adjustable continuous spotting (1-9 dots), you can perfectly tailor the heat output to match the thickness of your specific project materials.

4. 2-in-1 Versatility: Spot Welder & 5000mAh Power Bank

The SWM-20 features a high-rate 5000mAh lithium battery that supports 5V/2.1A fast charging and discharging. Not only is it a top-tier welding tool, but it also serves as a reliable portable power bank to charge your smartphones or tablets during outdoor repairs or emergencies.

5. Compact, Portable & Safety-First Design

Designed for the DIY enthusiast and professional technician alike, this handheld welder is compact enough to fit in your pocket or toolbox. The ergonomic design ensures a comfortable grip for long sessions, while the integrated safety management system prevents overheating, making it the ideal on-the-go solution for battery pack maintenance and lab experiments.

Basic Parameters

Battery Capacity: 5000mAh

Charging: 5V/2.1A

Discharging: 5V/2.1A

Welding Materials: Nickel, lron, Stainless Steel

Welding Thickness: 0.1-0.4mm

MAX Welding Current Level: 1200A 4 Preset Combination Levels

1.SWM-20 Spot Welder 

2. User Manual 

3. Nickel Sheet

4. Replacement Tip

5. Data Cable

6. Soldering Pen