FNIRSI SWM-20 Manual Spot Welder 800A Peak Current 99-Gear Adjustable Power with 0.96-inch OLED Display, USB-C Charging, Built-in 6000mAh Battery, Portable Handheld Welding Machine for 18650/26650/32650 Battery Pack Assembly

Delivering a peak welding current of 800A, the FNIRSI SWM-20 manual spot welder brings professional-grade battery pack assembly into a handheld, portable form factor. With 99 adjustable power gears, a built-in 6000mAh lithium polymer battery, and a crisp 0.96-inch OLED display, this welder is engineered for precision, safety, and convenience in DIY battery projects and small-scale production.

Overview

The FNIRSI SWM-20 is a manual spot welder designed for welding nickel strips to battery terminals, commonly used in building 18650, 26650, and 32650 battery packs. It features an aluminum alloy housing for durability and heat dissipation, pure copper welding pens for efficient energy transfer, and multiple protection mechanisms including short circuit, over-temperature, and low voltage protection. The device supports both automatic and manual trigger modes, giving users flexibility based on the task at hand.

What stands out

• Peak output current of 800A for reliable welds on nickel strips from 0.1 to 0.25 mm thickness.
• 99 adjustable power gears allow fine-tuning for different nickel strip types and battery configurations.
• Built-in 6000mAh lithium polymer battery provides cordless operation, with USB Type-C charging (5V/2A) for convenience.
• 0.96-inch OLED display shows real-time settings and status, ensuring precise control.
• Dual trigger modes: automatic and manual, adjustable to match user preference and application.
• Comprehensive safety features: short circuit protection, over-temperature protection, and low voltage protection.
• Portable and lightweight design with aluminum alloy body, suitable for on-site repairs and hobbyist workstations.

Technical details

• Welding Output Current: 800A (Peak)
• Adjustable Power Levels: 99 Gears
• Welding Thickness (Nickel Strip): 0.1 - 0.25 mm
• Display Type: 0.96-inch OLED
• Battery Type: Built-in Lithium Polymer
• Battery Capacity: 6000 mAh
• Charging Port: USB Type-C
• Charging Input: 5V/2A
• Housing Material: Aluminum Alloy
• Electrode Material: Pure Copper Welding Pens
• Trigger Mode: Automatic & Manual (Adjustable)
• Short Circuit Protection: Yes
• Over-temperature Protection: Yes
• Low Voltage Protection: Yes
• Recommended Nickel Strip Type: Nickel-plated steel, Pure nickel
• Applications: 18650/26650/32650 Battery Pack Assembly, DIY Battery Projects
• Output Voltage: 4.2V (Max)
• Portability: Handheld, Portable

Our verdict

The FNIRSI SWM-20 strikes an excellent balance between power, portability, and safety. Its 800A peak current and 99 gear adjustments make it versatile for a wide range of nickel strip welding tasks, while the built-in battery and USB-C charging eliminate the need for external power sources. The inclusion of multiple protections and a clear OLED display adds confidence for both beginners and experienced users. For anyone serious about DIY battery pack assembly, this welder is a compelling choice.