FNIRSI SWM-20 Portable Spot Welder
The FNIRSI SWM-20 is a compact double-pulse spot welding machine designed for DIY battery pack assembly, repair and small welding projects. Its portable design makes it convenient for working with 18650 lithium battery cells and nickel strips.
Key Features
• FNIRSI SWM-20 portable spot welding machine
• Double-pulse welding technology for controlled welding
• Designed for 18650 lithium battery pack assembly
• Suitable for nickel strip welding
• Supports nickel strips up to the manufacturer's specified thickness
• Compact and portable design
• Easy-to-use controls for convenient operation
• Suitable for DIY battery pack building and repair
• Useful for electronics projects, workshops and hobby applications
• Designed for reliable connections between battery cells and nickel strips
Applications
The SWM-20 is suitable for assembling and repairing battery packs using compatible lithium-ion cells such as 18650 batteries. It can also be useful for other small welding applications where thin nickel material needs to be securely connected.
The double-pulse welding function helps provide controlled welding performance while reducing the risk of excessive heat during the welding process when appropriate settings are used.
Important Safety Information
This is a high-current electrical welding device. Always use the machine according to the manufacturer's instructions and recommended welding parameters. Wear suitable eye and hand protection and keep the work area clear of flammable materials. Battery cells can present a fire hazard if incorrectly handled, welded or damaged.
Please check the manufacturer's recommended material thickness and welding parameters before use, as performance depends on the battery type, nickel strip thickness, connection quality and operating conditions.

