Product details
Bring dual-pulse control to suitable thin-strip welding tasks with the FNIRSI SWM-20 portable spot welder. A 2.4-inch display and rotary control keep the settings visible, while separate welding pens let you position the contacts around a small assembly. Rechargeable power and USB-C charging suit a compact maker’s workbench.
See the setting. Make the adjustment.
The screen and rotary control give you a clear place to work through the available welding settings. Dual-pulse operation adds another way to tune the process for suitable material. Begin on a representative scrap sample so the actual joint, rather than a generic number, determines the setup.
Place the pens where the work needs them.
Separate handheld welding pens let you position the contact points around a small assembly. The compact body keeps the main unit beside the work area while you concentrate on placement. Consistent contact, a suitable material, and correct preparation matter as much as the setting on the display.
A bench tool you can put away.
Rechargeable power and USB-C charging make the unit easier to keep with a compact electronics toolkit. The form suits an experienced maker who wants a portable option for appropriate thin-strip spot-welding tasks, with enough room on the bench left for the rest of the project.
In the box
FNIRSI SWM-20 portable spot welder with welding pens and USB charging equipment from the standard package. Battery cells, production fixtures, consumables, and safety equipment are separate.
Delivery & Returns
Delivery
- See delivery estimates for your address and shipping method at checkout.
- Standard shipping is free on every order, with no minimum spend. Delivery estimates and optional express rates are shown at checkout. View shipping policy.
- Full details in the shipping policy.
Returns
- Return eligible unused, unassembled items for free within 30 days of delivery.
- Read the refund policy for eligibility, exclusions and return instructions.
Customer reviews
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★★★★★
The product came very well packaged, the quality of the finishing and construction of FNIRSI products is excellent, the product works very well and meets expectations.
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★★★★★
The device is well-made, beautiful, and convenient, but it doesn't weld as advertised. It can be used to assemble some power banks with a 0.1-0.15mm tape and nothing thicker. I tried to weld a 0.2mm tape to an 18650 battery and it only gave a few pulses at one point - it holds very weakly and if you pull it, it falls off. The 0.1mm tape is welded okay, but there is no complete weld. It's not even worth trying with copper tape - it doesn't stick. The product's specifications clearly do not match reality.
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★★★★★
Exceeded my expectations, works perfectly.
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★★★★★
Very good product with excellent packaging, arrived in perfect condition.
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★★★★★
The equipment is excellent, easy to operate, and offers an incredible level of quality in work performance.
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★★★★★
What are the settings for each thickness?
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★★★★★
Great welder! i'm very satisfied!
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★★★★★
Great product, I've never seen anything better crafted with high-quality finishing, easy to operate. Excellent precision, in short, very complete. Congratulations, I definitely recommend this store!
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★★★★★
It arrived well packaged and quickly, just need to test the product.
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★★★★★
Item matches the description in the seller's listing.
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★★★★★
Excellent product, perfect, small but works very well, arrived quickly and was very well packaged.
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★★★★★
Perfect spot and easy adjustment, first use not welding strongly and after reading manual changes some parameters and working great, thank you. by the way i have iron soldering from same brand its just perfect
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Questions before you buy
What material thickness will it weld?
Weld suitability depends on strip material, thickness, surface preparation, and the complete setup. Tune the settings on a representative sample before working on the final assembly.
Is it a beginner’s battery-building kit?
No. Spot welding and working around battery cells require appropriate experience, insulation, protection, and safe handling. It is a tool, not a complete battery-building system.
How should I start?
Read the manual, prepare a stable work area, inspect the pens and connections, and tune on a representative scrap sample before using it on the intended assembly.
How do I choose the correct option?
Use the option buttons above the Add to cart button and check the selected name, image, price, and availability before ordering. Choose only the option that matches the version you want.
How long does shipping take?
What if I change my mind?
Return eligible unused, unassembled items for free within 30 days of delivery. Read the refund policy for eligibility, exclusions and return instructions. Contact us before sending anything back.
