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Highlights
◉ 1200A High-Power Output for Strong, Reliable Welds
◉ Dual-Pulse Technology for Cleaner & More Stable Welding
◉ Dual A-Grade Batteries + 8 Safety Protections
◉ 2-in-1 Design: Spot Welder + 5000mAh Power Bank
◉ 0.1–0.5mm Multi-Material Welding Capability
◉ 10,000+ Precision Adjustment Levels for Pro Control
◉ 2.4” TFT Display with Real-Time Data Monitoring
The portable handheld spot welder is a high-efficiency, convenient, and easy-to-carry welding tool that adopts dual-pulse spot welding technology to ensure more stable and reliable welds and also features a power bank function. It is equipped with a 2.4-inch high-definition display screen for intuitive and clearoperation, and a rotary encoder knob for parameter adjustment, allowing users to easily and accurately set welding parameters, thereby enhancing the user experience.
Features
- 1200A High-Current Output for Powerful Welding: Delivers up to 1200A peak current for strong and consistent welds across various materials.
- Dual-Pulse Welding Technology for Stable Results: Uses a primary pulse to remove oxide and a secondary pulse for cleaner, more reliable welds.
-
Wide Material Compatibility (0.1–0.5mm Range)
Supports multiple materials including:
- Nickel-plated steel (max 0.4mm)
- Steel (max 0.5mm)
- Pure nickel (max 0.25mm)
- Iron (max 0.3mm)
- Copper & nickel-plated copper (max 0.1mm)
- 10,000+ Ultra-Fine Adjustment Levels: Provides precise power control to match different welding needs and materials.
- Fully Adjustable Welding Parameters: Allows flexible control of preheat, pulse, interval, and continuous welding points.
- 2.4” TFT Color Display with Real-Time Data: Shows voltage, temperature, and welding parameters clearly for easy monitoring.
- Rotary Knob Control for Precision Tuning: Enables fast and accurate parameter adjustments with intuitive operation.
- Dual A-Grade 5000mAh Battery Cells: Ensures high power output, longer runtime, and stable performance.
- Up to 1,500 Welding Cycles per Charge: Supports extended usage for both professional and DIY applications.
- 2-in-1 Spot Welder & Power Bank: Functions as both a welding tool and a 5V/2.1A USB power source.
- Fast Type-C Charging (5V/2.1A): Provides efficient recharging for minimal downtime.
- Detachable Pure Copper Welding Pens: Uses 99.9% copper tips for high conductivity, durability, and heat dissipation.
- Compact and Portable Design: Lightweight handheld form factor for easy carrying and on-site work.
- 8-in-1 Smart Safety Protection System: Integrates over-temp, undervoltage, overcharge, over-discharge, short-circuit, voltage stabilization, low-temp, and impact protection for safe and reliable operation.
- Adjustable Auto Shutdown (0–99 Minutes): Automatically powers off to save energy and enhance safety.
- USB-C Firmware Upgrade Support: Allows future updates and performance improvements.
- Versatile Application Scenarios: Ideal for battery pack building, e-bike repair, phone battery replacement, and DIY projects.
Specifications
Battery Capacity
5000mAh
Charging
5V / 2.1A
Discharging
5V / 2.1A
Welding Materials
Nickel, Iron, Stainless Steel
Welding Thickness
0.1‒0.5 mm
Max Welding Current
1200A
Level
4 Preset Combination Levels
Package List:
◉ SWM-20 Host
◉ Welding Pens
◉ Replacement Tips
◉ USB-C Cable
◉ Nickel Strip
◉ User Manual
◉ Welding Pens
◉ Replacement Tips
◉ USB-C Cable
◉ Nickel Strip
◉ User Manual
Package List:
◉ SWM-20 Host
◉ Welding Pens
◉ Replacement Tips
◉ USB-C Cable
◉ Nickel Strip
◉ User Manual
◉ Welding Pens
◉ Replacement Tips
◉ USB-C Cable
◉ Nickel Strip
◉ User Manual
Using Environment and Precautions
The device should be stored in a soft case, and the operating environment should be at a temperature of -5~40℃, and the relative humidity should not exceed 80%.
The device should be stored in a clean and dry place to avoid moisture, mold, heavy pressure, mechanical damage,humidity and direct sunlight.
Avoid using in the rain or fog, avoid dropping or shocking.
When the screen on the LCD does not light up, it indicates that the voltage is too low, and it needs to be charged in time.
Copyrights
The product specifications are subject to change without notice, allfinal interpretation rights were reserved by FNIRSI Technology Co., Ltd, All trademarks, product images, technical parameters are properties of FNIRSI Technology Co.. Ltd. All rights reserved.
Warranty
30-Day return and refund guarantee (Refer to our Refund Policy), 2-year warranty (only available for orders purchased directly from fnirsi.com), lifetime technique support by FNIRSI.
Please feel free to reach us with any concerns:
Email: service@fnirsi.com / info@fnirsi.com
We strive to reply to you within 24 hours.
FNIRSI has started researching and development manufacturer of quality optical products including Golf rangefinder, laser,measure device and binoculars since 2016.
Focus on the development,researching, and manufacturing for over 8 years.
We are committed to delivering premium products and exceptional customer service, striving to be your most reliable and intelligent assistant.
At Fnirsi, we are committed to providing our customers with the best value for their purchases. To ensure you always get the best price, we offer a 30-day price guarantee on all products purchased directly from fnirsi.com. This policy aims to give you confidence and peace of mind when shopping with us.
What is the 30-Day Price Guarantee?
Our 30-day price guarantee means that if you purchase a product from fnirsi.com and the price of that product drops within 30 days of your purchase date, you are eligible for a refund of the price difference of the products. (Prices are based on USD. No refunds will be given for price changes in other currencies due to exchange rate fluctuations.)
How Does the Price Guarantee Apply?
- Eligibility: The price guarantee applies only to purchases made on fnirsi.com. Products purchased from other retailers or third-party sellers are not eligible.
- Timeframe: The price drop must occur within 30 days of your original purchase date.
- Product Match: The price guarantee applies to the same product (identical model, specifications, and condition).
How to Apply for a Price Difference Refund
If you notice that the price of a product you purchased from fnirsi.com has dropped within 30 days, follow these steps to apply for a refund of the price difference:
- Documentation: Prepare your order number and proof of the price drop (such as a screenshot and link to the product page showing the reduced price).
- Contact Us: Reach out to our customer support team at info@fnirsi.com .Include your order number, proof of the price drop, and a brief explanation of your request.
- Verification: Our team will verify the price drop and your purchase details.
- Refund Process: Once verified, we will process the refund for the price difference to your original method of payment. It typically takes 1-3 business days for you to receive the refund.
At Fnirsi, we strive to provide our customers with high-quality products and exceptional customer service. Our 30-day price guarantee is just one of the ways we ensure you get the best value for your investment. Shop confidently with Fnirsi, knowing that you are always getting the best deal available.
Thank you for choosing Fnirsi. If you have any questions or need further assistance, please do not hesitate to contact our customer support team at info@fnirsi.com.
A
Very easy to use
K
I connected the SWM-20 to my custom build welding station, works absolut perfect.
B
I bought this for my first attempts at producing my own li-ion battery packs for RC aircraft. The package arrived pretty quickly and was well packaged.
After charging the unit I had a go at welding some of the included strip to itself , users should note that the supplied strip is nickel plated steel.
What would be very useful is a guideline table showing settings to use as a starting point with different materials and thicknesses.
I bought pure nickel .15mm strip and had to spend a while finding the best setting , using an old battery as a test piece, once I'd worked out a good reliable setting that gave strong welds the welder was easy to use and gave strong reliable joints. One other thing I realised is that cutting an air strip in the nickel strip as advised by a few users also really helps with the weld.
Overall this is a great little hobby welder and I'm very pleased with the purchase.
S
SWM-20 1200A Soudeuse portable à points :
Apres une prise en main et acquisition du doigté surtout pour exercer la bonne pression (sinon echec), tout se passe bien, faut juste appuyer vraiment modérement. A ce prix là, je suis entierement satisfait. j'ai pu réaliser tyranquillement ma batterie 10s7p. Ce spot welder est vraiment de bonne qualité, solide, l'autonomie n est pas phénoménale mais permet un tres bon marathon de soudures. Je l'ai utilisé avec la prise de recharge branché, ça augmente nettement l autonomie. Les réglages sont faciles à comprendre. Pour souder du 0.15mm j ai utilisé 9ms de chauffage et pulse à 30, puis 35 en fin de batterie, en 2xrépétition. Merci FNIRSI vous avez assuré grave !
A
It is an awesome product, working better than I expected
M
The welder works as described. It is easy and intuitive to use. It offers many settings, and the additional power bank function is also useful. I recommend it.
P
La spedizione ha impiegato un pò troppo tempo ma quando ho aperto e iniziato ad usare il prodotto, mi sono reso conto che il tempo atteso era stato dimenticato e superato dalla qualità del prodotto e dalle finiture di qualità dell'intero oggetto. Il funzionamento è intuitivo e assolutamente di qualità. i punti di saldatura sono tenaci e perfetti tanto da non richiedere alcuna modifica dei parametri preimpostati. Ottimo prodotto da consigliare a chiunque abbia bisogno di tale apparecchiatura. Il costo poi è assolutamente competitivo con tutti gli altri saldatori che ho provato.
D
I like the way that most of the products that I receive from Fnirsi are made, the interface is very simple and the product looks professional and delivers accurate results. The welds are very consistent too.
H
Spot Welder SWM-20 (DSO-152) delivered with new firmware v1.0.9 and tested and working. Good quality product!
J
Hello. I have three products from your company. I am very satisfied with the quality and functionality. I will gladly recommend your products to my friends. Specifically, I have the Soldering pen HS-03, SWM-10 and SWM-20. Everything works reliably. Thank you.
S
Excellent product has many more uses than just making battery packs !
D
This welder does a really nice weld on the battery tags it is small light and very portable . I tested it on a few old batteries and I was very happy with the strong clean welds. Cant wait to do some battery repairs with it.
V
J’ai toujours été satisfait des produits de cette marque
L
OK-it would take a little more strength
G
Very good quality
A
👍
G
Ottimo prodotto, sono molto soddisfatto dell’acquisto
A
👍
S
It's incredibly powerful!
I used it to weld the broken-off handle back onto a metal mug!
Oh, and it punched a hole right through the side of the 0.5mm stainless steel mug!
C
Thanks
f
Pretty good. Fast response, clean interface and nice overall design. Takes a little tweaking but works well.
N
The portable spot weld works great when in use with easy fine tuning with setting and other features for the price
M
FNIRSI® SWM-20 1200A Dual-Pulse 2-in-1 Portable Battery Spot Welder
K
FNIRSI® SWM-20 1200A Dual-Pulse 2-in-1 Portable Battery Spot Welder
P
FNIRSI® SWM-20 1200A Dual-Pulse 2-in-1 Portable Battery Spot Welder
C
This is the third tool I have purchased from FNIRS and I cannot fault it at all. The price is very reasonable. The quality is excellent and its performance is spot on. I shall be purchasing more equipment in due course.
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