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The FNIRSI SWM-10 is a portable battery spot welder built around a 5000mAh cell, combining double-pulse spot welding technology with the everyday usefulness of a power bank. It charges and discharges at 5V/2.1A, so the same battery that fires welding pulses can top up a phone or other USB device when it is not busy welding, which is a practical extra for anyone who wants one gadget rather than two in a field kit.
It is built for spot-welding thin sheet metal commonly used in battery pack building: nickel sheet, iron sheet, stainless steel sheet and aluminium sheet, at a welding thickness of 0.1 to 0.25mm. Maximum welding current reaches 1200A, which is delivered through a dedicated spot welding pen included with the unit.
A colour screen shows welding parameters at a glance, and four combination gear settings let the pulse strength be matched to the metal and thickness in use, rather than relying on a single fixed setting for every job. FNIRSI includes intelligent anti-burning protection along with multiple security protection reminders, aimed at reducing the risk of overheating or a bad weld caused by too much current for the material.
The unit measures 155mm x 82mm x 28mm, small enough to fit in a tool bag alongside battery-building or repair gear, and uses A-grade battery cells inside for consistent output.
Hobbyists building custom battery packs from 18650 or similar cells, drone builders assembling battery groups, and anyone doing occasional thin-sheet metal joining will find the SWM-10's compact, dual-purpose design convenient. For heavy industrial welding, a mains-powered dedicated spot welder would be a better fit.
Nickel sheet, iron sheet, stainless steel sheet and aluminium sheet, at a thickness of 0.1 to 0.25mm.
1200A.
Yes, its 5000mAh battery charges and discharges at 5V/2.1A, so it can charge USB devices as well.
Four combination gear settings to match different metals and thicknesses.
The welder, a spot welding pen, a USB charging cable, a manual, a nickel sheet and spare needles.
| Brand | FNIRSI |
|---|---|
| Selling unit | PCS |
