FNIRSI SWM-20 Manual Spot Welder

FNIRSI SWM-20 Handheld Spot Welder

The FNIRSI SWM-20 handheld spot welder offers a compact and portable design that combines high power, precision, and ease of use. It delivers a maximum welding current of 1,200 A and features dual-pulse technology with over 10,000 adjustment levels, allowing customization for various materials and applications. Equipped with high-capacity batteries, it ensures long operating time, and its color TFT display provides real-time monitoring of all key settings. Additionally, it functions as a 5,000 mAh power bank, making it suitable for both workshop and field use. This versatile tool is ideal for professionals, service technicians, and DIY electronics enthusiasts.

Power That Ensures Durable and Clean Welds

The FNIRSI SWM-20 generates peak currents up to 1,200 A, enabling strong and repeatable welds on a variety of materials. Its dual-pulse technology improves weld quality by using the first pulse to remove oxide layers and the second pulse to perform the weld, resulting in cleaner and more stable joints. It supports material thicknesses from 0.1 to 0.5 mm, including nickel-plated steel up to 0.4 mm, steel up to 0.5 mm, pure nickel up to 0.25 mm, iron up to 0.3 mm, and copper and nickel-plated copper up to 0.1 mm. With over 10,000 power adjustment levels and customizable parameters such as preheating, pulse count, intervals, and continuous weld counts, users can precisely tailor the device to specific materials and tasks.

Full Control and Convenient Operation

The device features a clear 2.4-inch color TFT display that shows voltage, temperature, and all key welding parameters in real time. An intuitive rotary knob allows quick and precise adjustment of settings, facilitating efficient parameter changes even during intensive use. The spot welder supports software updates via a USB-C port, enabling future improvements and new features.

High-Capacity Battery and Practical Design

Equipped with two high-quality battery cells totaling 5,000 mAh capacity, the FNIRSI SWM-20 ensures stable operation and sufficient power reserves for demanding tasks. A single charge supports up to 1,500 welds, minimizing downtime. Fast charging is available via the USB-C port (5 V / 2.1 A). The device also functions as a power bank with a 5 V / 2.1 A USB output to charge or power other devices. Detachable welding tips made of 99.9% pure copper provide excellent conductivity, effective heat dissipation, and high durability.

Safety During Every Operation

The FNIRSI SWM-20 includes an intelligent eight-protection system that safeguards against overheating, undervoltage, overcharging, over-discharge, short circuits, voltage fluctuations, low temperature operation, and impacts. An automatic shut-off function with an adjustable timer (0 to 99 minutes) enhances safety and energy efficiency. This spot welder is ideal for building battery packs, repairing electric bicycles, replacing smartphone batteries, and various electronics and DIY projects.

Included in the Set

• Spot welder
• Welding tips
• Replacement tips
• USB-C cable
• Nickel strip
• User manual

Technical Specifications

• Manufacturer: FNIRSI
• Model: SWM-20
• Battery capacity: 5,000 mAh
• Output: 5 V / 2.1 A
• Welding thickness: 0.1–0.5 mm
• Preset combination levels: 4 levels
• Charging: 5 V / 2.1 A via USB-C
• Welding materials: Nickel, iron, stainless steel
• Maximum welding current: 1,200 A