FNIRSI SWM-20 Portable Spot Welder – Specifications

Model: SWM-20

Key Features

• Dual-pulse spot welding technology

• Maximum welding current: 1200A

• Built-in rechargeable battery

• 2-in-1 design: Spot welder and power bank

• Adjustable welding parameters

• 4 preset welding modes

• More than 10,000 fine power adjustment levels

• Suitable for battery pack assembly and repair work

Welding Specifications

• Maximum Welding Current: 1200A

• Welding Technology: Dual-pulse spot welding

• Welding Thickness: 0.1–0.5 mm, depending on material

• Pure Nickel Strip: Up to 0.25 mm

• Nickel-Plated Steel: Up to 0.4 mm

• Steel: Up to 0.5 mm

• Iron: Up to 0.3 mm

• Copper: Up to 0.1 mm

• Nickel-Plated Copper: Up to 0.1 mm

• Preheat Time: 1–10 ms

• Main Pulse Time: 1–99 ms

• Pulse Interval: 1–10 ms

• Continuous Welding Points: 1–9

Display and Controls

• Display: 2.4-inch TFT colour screen

• Resolution: 320 × 240 pixels

• Operation: Rotary encoder knob and physical buttons

• Display Information: Battery voltage, temperature, welding parameters and battery status

Battery and Power

• Battery Capacity: 5000 mAh

• Charging Input: 5V / 2.1A

• Power Bank Output: 5V / 2.1A

• Welding Capacity: Up to 1,500 welding cycles per charge, depending on operating conditions

• Charging Port: USB Type-C

Safety Features

• Over-temperature protection

• Overcharge protection

• Over-discharge protection

• Short-circuit protection

• Undervoltage protection

• Low-temperature protection

• Voltage stabilisation protection

• Impact protection

• Adjustable automatic shutdown: 0–99 minutes

Applications

• Lithium-ion battery pack assembly

• Battery tab welding

• E-bike battery repair

• Power tool battery pack construction

• DIY battery projects

• Small metal component spot welding

Package Contents

• 1 × FNIRSI SWM-20 Spot Welder

• 1 × Pair of Welding Pens

• Replacement Welding Tips

• USB Type-C Cable

• Nickel Strip

• 1 × User Manual