The WESTOBiG FNRSI Battery Spot Welder is a remarkably compact powerhouse, serving as a pocket-sized forge for all your battery assembly and repair needs. It employs sophisticated double-pulse spot welding technology, which acts like a tiny, high-speed blacksmith, striking twice to ensure welds are not only stable but also exceptionally firm, thereby forging a bond that will endure. Furthermore, it houses a substantial 5000mAh high-rate power lithium battery within its shell, which is the very heart of this device, providing long-lasting energy for your projects. Consequently, this welder is not merely a tool; it doubles as a 5V/2.1A power bank, enabling it to act as a lifeline for your mobile devices when you are working remotely, and you need a quick recharge. The FNRSI Adjustable Battery Pack Welder transforms complex battery work into a task of surprising simplicity.
Moreover, the intelligence of this FNRSI Adjustable Battery Pack Welder is immediately evident through its user-centric design. It features a bright, 1.8-inch high-definition FFT color LCD screen, which is the window into the device’s soul, clearly displaying all vital information such as battery voltage, temperature, and current status at a glance. But that is not all; it also offers deep customization, because you can precisely tailor settings for preheating, pulse length, interval, and the number of connection points, allowing for granular control over the welding process. This flexibility is the key that unlocks professional-grade results, while its maximum welding current of 1200A and four combination gear adjustments give you the necessary muscle and finesse to tackle various materials. Indeed, the device can effectively weld nickel, iron, and stainless steel sheets, with a respectable maximum thickness of $0.25\text{mm}$, proving that great power can come in a small, portable package.
Finally, safety and versatility are woven into the very fabric of this device. A built-in intelligent temperature control probe functions as a diligent guardian, vigilantly protecting the unit against the dangers of over-temperature, low voltage, and short circuits, thus offering peace of mind during intensive use. In addition to its primary function, this FNRSI Adjustable Battery Pack Welder is incredibly portable; consequently, it is an indispensable companion for both professional technicians constructing battery packs and hobbyists working on their DIY projects, because its compact dimensions make it easy to carry. Ultimately, the FNRSI Adjustable Battery Pack Welder is a comprehensive solution, combining portability, power, and precision, and therefore, it is an essential piece of equipment for anyone dealing with 18650 or similar battery cell construction and repair, whether you are in a workshop or out in the field.
FEATURES:
– Doubles as a power bank
– Double Pulse welding tech
– Welds 0.1mm to 0.25mm metal
– 1200A max welding current
– 4-gear power adjustment
– Color LCD screen display
– Includes smart safety protection
– Adjustable welding settings
The WESTOBiG FNRSI Portable Battery Spot Welder uses double pulse welding technology for strong, stable welds. It has a maximum welding current of 1200A. The welder can handle metal thickness from $0.1\text{mm}$ to $0.25\text{mm}$. It is suitable for iron, stainless steel, and nickel strip, commonly used in $18650$ battery packs. Users can precisely control the power with a $4$-gear adjustment system. A color LCD screen displays welding status and settings. The device includes smart safety protection features. It also offers adjustable welding parameters like preheating and pulse time. The built-in $5000\text{mAh}$ battery doubles as a convenient power bank.
– Great value
– Exceptional quality
– Neat, compact, and very easy to use
– Outstanding design
– Pays for itself quickly
– Doubles as a battery bank
– Comes with a roll of nickel tab stock
– Easy to understand instructions
– Exceptionally well packaged
– Reusable box for storage
– More power than expected
– Worked great
– Helpful for tool battery repairs
– Buenísimo
– Worked great for my needs
– Convenient that it’s portable
– Easy to use
– Less detailed instructions
– No setting recommendations
– Failed after limited use
– Poor customer support
– Not for long weld sessions
The WESTOBiG FNRSI Battery Spot Welder is a portable, compact, and well-designed handheld spot welder offering more power than expected, capable of welding 0.1MM to 0.25MM nickel strip for iron, stainless steel, and 18650 battery packs. Users found it easy to use with clear instructions and appreciated the exceptional quality, neat packaging in a reusable box, and the inclusion of a roll of nickel tab stock. It features double pulse and four adjustable gears, and it conveniently doubles as a battery bank, proving helpful for tool battery repairs and providing great value that quickly pays for itself. However, some users noted less detailed instructions, a lack of setting recommendations, limitations for long weld sessions, failure after limited use, and poor customer support. Read more…
FNRSI Brass Spot Welding Pen Features

The image shows a brass spot welding pen, which is a component of the FNRSI Handheld Double Pulse Welder. It features a professional design for spot welding. The grip is comfortable with silicone anti-slip material. A key feature is the detachable welding pen head. This replaceable design means the user does not need to replace the entire pen.
FNRSI Welder Showcases Double Pulse Welding Technology

The image prominently displays an FNRSI SWM-1 portable spot welder. Its screen is illuminated, showing various settings and a ‘Double Pulse Welding Technology’ label. This technology releases two pulses during welding. One pulse cleans the metal’s oxide layer. This action reduces spark spattering. The second pulse ensures consistent energy output. This process reliably improves the quality of the weld. The device is used for welding materials like 0.25MM nickel strips.
High-Rate, High-Quality Batteries in the WESTOBiG FNRSI Spot Welder

This image is an exploded view of the WESTOBiG FNRSI Battery Spot Welder. It highlights the power source of the device. The spot welder uses two high-rate power lithium batteries. These are described as high-quality A-grade batteries. The product literature emphasizes that it rejects cheap B-grade batteries. The image shows the internal layout of the battery pack and main circuit board.
Portable Spot Welder Doubles as a Power Bank

This image showcases a portable spot welding machine that has a dual function. It can also be used as a power bank. The device includes a USB 5V/2.1A output. This allows it to charge USB devices. A mobile phone is shown charging from the device. The screen shows a 75% charge on the phone. This makes it a versatile two-in-one tool.
Portable Intelligent Color Screen Spot Welding Machine

The image shows a FNRSI SWM-10 Portable Intelligent Color Screen Spot Welding Machine. This is an adjustable battery pack welder. The device is black with a digital screen displaying various settings. It comes with a pair of spot welding pens, a USB-C charging cable, and what appears to be extra welding tips and a metal ring accessory. The red and black cables are visible. The model name “SWM-10” is printed on the bottom.
FNRSI SWM-18 Spot Welder for Efficient Battery Pack Assembly

The image shows the FNRSI SWM-18 Portable Intelligent Color Screen Spot Welding Machine. It highlights the device’s capability for ‘one touch welding’ for high efficiency. The machine is connected to weld multiple cylindrical batteries into a pack. It is designed to create firm welds and excellent solder joints. The welder can handle nickel plate, sheet iron, and steel sheet up to a maximum thickness of $0.25\text{mm}$.









