Kerpu Battery Pack Spot Welder Kit Review – Pros & Cons – Battery Spot Welder

The Kerpu Battery Pack Spot Welder Kit is a pocket-sized powerhouse, a titan in a tiny frame. Its compact form belies its incredible capability, for it wields the power to fuse metal with pinpoint precision. This machine is a master craftsman, and its 11-gear adjustable power settings are its versatile tools, allowing you to tailor the welding intensity with meticulous care. Whether you are working on delicate projects or robust battery packs, this spot welder will perform with unwavering consistency. It is equipped with a formidable 5000mAh rechargeable battery, and it holds a charge like a steadfast promise, ready to tackle your projects for extended periods without faltering. The kit also includes a generous 2M nickel sheet and four 4×4 battery holders, providing you with everything you need to begin your journey into the world of battery pack creation. Thus, this Kerpu Battery Pack Spot Welder Kit is not merely a tool, but an entire workshop in the palm of your hand.

Furthermore, this Kerpu Battery Pack Spot Welder Kit is designed for seamless operation, making it a dream for both seasoned professionals and curious novices. Its intuitive interface is as clear as a mountain spring, and it guides you through the process with effortless ease. The small sentences ensure that every step is a breeze, preventing any confusion or missteps. The machine’s rapid response time is like a flash of lightning, delivering a swift and secure weld in an instant. Subsequently, the included accessories are thoughtfully curated, and they serve as the perfect companions to the main unit, allowing you to build intricate battery configurations with remarkable dexterity. Consequently, the included nickel sheet is a blank canvas, and the battery holders are the perfect molds, and together they enable you to construct custom battery packs for a wide array of applications. Therefore, this Kerpu Battery Pack Spot Welder Kit transcends the ordinary, offering a truly comprehensive and user-friendly experience.

Ultimately, the Kerpu Battery Pack Spot Welder Kit is an investment in limitless creativity and functional power. It empowers you to bring your projects to life, and it gives you the ability to mend, build, and innovate. The device itself is as dependable as an old friend, and its consistent performance is a testament to its superior engineering. After all, it is the heart of a maker’s toolkit, and it beats with the rhythm of innovation. In conclusion, this spot welder is a small key that unlocks big possibilities, and it opens the door to a world where broken electronics can be fixed, and new inventions can be powered. This is more than just a tool; it is a catalyst for creation, and it’s a testament to the fact that great power can indeed come in small packages.

FEATURES:
– Pocket-sized design
– 11 gears adjustable power
– 5000mAh rechargeable battery
– Includes 2M nickel sheet
– Comes with 4X4 battery holder
– Used for making battery packs
– Kerpu brand
– Suitable for 18650 batteries
– Portable spot welder machine
– High capacity battery

The Kerpu 18650 Spot Welder is a pocket-sized, portable machine designed for making battery packs. It features 11 adjustable power gears and is powered by a high-capacity, 5000mAh rechargeable battery. The package includes a 2M nickel sheet and a 4×4 battery holder, making it suitable for welding 18650 batteries.

PROS:
– Welds great
– Works as it should
– Works really good
– Good value for light-duty
– Works for amateur use
– Works as long as it’s plugged in
– Very easy to use
– Lightweight and portable
– Includes everything needed
– Can be used as a power bank
– Has a safety controller

CONS:
– Welding leads are too short.
– Leads crimped, can’t replace tips.
– Low power for thicker metals.
– Only for occasional, light use.
– Weak and small welds

The Kerpu 18650 Spot Welder is a lightweight, portable, and easy-to-use tool with an 11-gear adjustable power setting and a 5000mAh rechargeable battery that can also function as a power bank. It is suitable for amateur, light-duty, and occasional use, and works well for making battery packs, though some users note that its low power is not ideal for thicker metals and may produce weak, small welds. The device includes everything needed to get started, such as a 2M nickel sheet and 4×4 battery holder, and has a safety controller, but its welding leads are too short and cannot have their tips replaced since they are crimped. It works best when plugged in, providing good value despite its limitations. Read more…







Portable Mini Power Bank for Kerpu Pocket Welder

Portable Mini Power Bank for Kerpu Pocket Welder

This image shows a 5000mAh mini power bank. It is portable and compact. It can support charging for your smartphone. It has a Type-C charging port. The device takes 3 hours to be fully charged. The input is 5V/2A. This power bank is suitable for powering the Kerpu Pocket Welder for 18650 batteries.



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Best Kerpu Battery Pack Spot Welder Kit Deals

Battery Spot Welder, Kerpu 18650 Spot Welder Machine Pocket Size with 11 Gears Adjustable,5000mAh Rechargeable Battery,2M Nickel Sheet & 4X4 Battery Holder For Making Battery Packs

Image of Battery Spot Welder, Kerpu 18650 Spot Welder Machine Pocket Size with 11 Gears Adjustable,5000mAh Rechargeable Battery,2M Nickel Sheet & 4X4 Battery Holder For Making Battery Packs

$39.99 @ Amazon.com (Save 20%)

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Key Features

  • ✅ Pocket-sized mini spot welder: Kerpu mini-size battery spot welder CP01. only half the size of other spot welders, easy to carry. designed for welding nickel strips of cylindrical batteries, NI-MH batteries,18650 nickel-cadmium batteries, etc. built-in 5000mAh rechargeable batteries, you can spot welding your battery anywhere anytime.package included complete accessories, it's a great gift idea for fathers, husbands, male friends, and DIY enthusiasts.
  • ✅ Supports more precise spot welding mode settings: We have optimized and upgraded the product. the battery spot welder support 11 gears adjustment, support automatic modes. making it easy to make battery packs (support welding thickness of less than 0.2mm of iron, steel, and stainless steel sheets). use the equipped power cord to quickly charge the device, and maintain the battery level at 50% every time, to achieve the best welding effect.
  • ✅ Multi-battery application tool: Unlike other plastic shells, our product is made of aluminum alloy, surface anodized, fire-resistant, and drop-resistant.the LED indicator light is very easy to identify the gear adjustment changes, charging status, and battery level changes. easy-to-spot welding cylindrical batteries, NI-MH batteries, and 18650 nickel-cadmium batteries. Note: Do not use too thick nickel foil (such as a thickness than 0.2mm).
  • ✅ Pay attention to the details of the product and the safety of use: CP01 is built in a 5000mAh rechargeable battery, and our product has passed overcharge protection, safety temperature control protection, load detection, and short circuit detection to protect your safety. In addition, when the product temperature exceeds 60 degrees, the device will pause to avoid battery damage and fire.
  • ✅ Equipped with 2M nickel strips and 4 battery brackets: The package includes 1x 5000mAh pocket-sized battery spot welding machine, 2x spot welding pens (line length 30CM + pen head 9CM), 2M nickel-plated foil (L=2m, W=0.9cm, Thickness=0.1mm), 4X4 battery brackets, 1x Metal file, 1x 1M USB to Type-c charging cable. If you have any questions, please feel free to contact us. Your good experience is important to us!

Product Details

Brand:Kerpu
Model:CP01
Dimensions:9 X 2 X 5.99 inches

Spot Welder,Kerpu Enhanced 0.2mm LCD 7500mAh Battery Spot Welder,Adjustable 80 Gears Battery Welder for 18650 Battery,4X4 Holder for Making Battery Packs,Type-C Intput Spot Welder with 5M Nickel Sheet

Image of Spot Welder,Kerpu Enhanced 0.2mm LCD 7500mAh Battery Spot Welder,Adjustable 80 Gears Battery Welder for 18650 Battery,4X4 Holder for Making Battery Packs,Type-C Intput Spot Welder with 5M Nickel Sheet

$40.99 @ Amazon.com (Save 20%)

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Key Features

  • ✅ LCD Display, Operation at a Glance: NEW SPOT WELDER with an LCD screen clearly and completely displays Delay, Gear, and Temperature. The temperature display shows the battery temperature, making it easy for us to see when to rest the spot welding machine. Delay time supports 0.5s unit adjustment. Gear supports 1&0.1 unit adjustment (gear max to 8.0). professional adjustment to meet different use scenarios.
  • ✅ Widely Used: Suitable for 18650 and other cylindrical lithium batteries, nickel metal hydride batteries, cadmium nickel batteries can be welded firmly, repairing mobile phone batteries, as well as repairing electronic devices such as handheld drills, power banks, and other devices containing batteries. It can be also used to weld iron, steel, stainless steel sheets with the thickness less than 0.2 mm/0.007 inch to other iron, steel, stainless steel materials. with it, save your time and effort.
  • ✅ Gear and Mode: Adjustable output power of 80 grades, no need to press, more accurate welding and more stability welding. Automatic easy to operate, press and hold the On/Off key for 2 seconds to start the machine, and then adjust the gear. When two spot welding pens touch the nickel plate at the same time once, it will automatically touch the nickel plate once.Detailed English instruction manual, easier to use.
  • ✅ Multiple protection: Our portable spot welders own perfect over-charge, over-discharge, over-temperature etc protection functions and double protection performance.Unique overheating protection device automatically cuts off power when the overheating occurs. Any operation within 8 minutes in the afternoon will automatically shut down to protect personal safety.
  • ✅ Can be a Decent Gift: the package includes: 1x 7500mAh battery spot-welding machine, 2x spot-welding pen (cable length 30cm+pen head 9cm), 1x5m nickel-plated foil (L=5m, W=1cm, Thickness=0.1mm), 4x4 Battery Holder,1x Metal File,1xType-c charging cable. please feel free to contact us. Your good experience is very important to us!

Product Details

Brand:Kerpu
Model:YJ7500

Spot Welder Control Board, High Output Battery Spot Welder, Battery Welder PCB Circuit Board 6 Gear Adjustable, Spot Welder for Lithium Batteries, Control Board Kit Spot Welder 100-900A (‎02B-DLB)

Image of Spot Welder Control Board, High Output Battery Spot Welder, Battery Welder PCB Circuit Board 6 Gear Adjustable, Spot Welder for Lithium Batteries, Control Board Kit Spot Welder 100-900A (‎02B-DLB)

Key Features

  • ✅ Safe to use: The spot welding board requires a self-contained power supply. You can use your own bike battery or other batteries to connect to our circuit board. The battery spot welding machine has a powerful output power, with 6 adjustable gears, and can weld materials of 0.02mm or even 0.03mm. Welding is more accurate, and thousands of points can be continuously welded onto nickel plates.
  • ✅ Widely used: Spot welding plates can be used for spot welding of lithium cylindrical batteries and nickel hydrogen batteries such as 14650, 17490, 18650, 21700, 26650, and 32650. You can also repair electronic devices with batteries, such as handheld drills, electric toy cars, electric toothbrushes, electric facial washers, and so on, saving you a lot of expenses.
  • ✅ Power selection: Spot Welding Machine Lithium Battery Control Board needs its own power supply, supporting 6.5V-16V power supply, battery discharge current <900A, short circuit current <1800A, beyond the above range may damage the control board.
  • ✅ Safe use: After connecting to the power supply, it will intelligently match and determine whether the power supply can work to prevent damage to the circuit board. The operation is simple. There is a multiplier and battery capacity to choose from. It can be determined whether the battery is low-power or high-power.
  • ✅ Rich accessories: We have equipped the power supply positive and negative poles with connecting wires, screws, spot welding pens, 2-meter nickel plated plates. You can practice more on discarded batteries, familiarize yourself with the power level of each gear, and then operate your equipment in practice. This is to prevent damage to your battery. The accessories are complete, and after receiving the goods, you only need the power to operate immediately.

Product Details

Brand:Kerpu
Model:‎02B-DLB

Spot Welder, Kerpu Mini Spot Welder, Portable Spot Welder Machine, Spot Welding Equipment Energy Storage 5000mAh for DIY 18650 Battery, Portable Battery Welder with Type-C port (Black)

Image of Spot Welder, Kerpu Mini Spot Welder, Portable Spot Welder Machine, Spot Welding Equipment Energy Storage 5000mAh for DIY 18650 Battery, Portable Battery Welder with Type-C port (Black)

Key Features

  • ✅ Adjustable 11 gears, more accurate welding and more stability welding. Automatic and manual mode adjustable, easy to operate.
  • ✅ The welding pen is comfortable to use, the length of welding pen is 40cm/16 inches, that makes operation more flexible. It is low resistance oxygen free copper material, welding stability.
  • ✅ Suitable for 18650 and other cylindrical lithium batteries, nickel metal hydride batteries, cadmium nickel batteries can be welded firmly. It can be also used to weld iron, steel, stainless steel sheets with the thickness less than 0.2 mm/ 0.007 inch to other iron, steel, stainless steel materials. With it, save your time and effort.
  • ✅ Our portable spot welders own perfect over-charge, over-discharge, over-temperature etc protection functions and double protection performance.Unique overheating protection device automatically cuts off power when the overheating occurs.
  • ✅ 【Our service】In the process of using the spot welder, please feel free to contact us if you have any questions. We will replace or refund for you to ensure that you can have a pleasant shopping experience.

Product Details

Brand:Kerpu
Model:DSH
Color:Black
Dimensions:3.49999999643 X 0.787401574 X 6.0629921198 inches

12000mAh Battery Spot Welder, Kerpu 2'' LCD Screen Upgraded Enhanced 199 Gears Adjustable Portable Mini Spot Welder with Nickel Sheet & 4X4 Holder For Making Battery Packs

Image of 12000mAh Battery Spot Welder, Kerpu 2

Key Features

  • ✅ High-Efficiency Spot Welding for Increased Productivity: Featuring a large capacity of 12,000 mAh, the spot welding technology is 30%-50% faster to meet the battery pack build. Automation-ready design ensures stable & reliable performance. Built with industrial-grade core components and optimized cooling system for non-stop operation. Delivers stable high-current output continuously for hours
  • ✅ Safe and Reliable, Easy to Operate: LCD liquid crystal display control, parameters at a glance, novice 2 minutes to get started quickly. Only one button, only automatic mode, do not need to familiarize themselves with other modes, get the machine, adjust the output power, can be used immediately, the use of the operation is very simple
  • ✅ Precise & Stable Performance for Quality Assurance: Smart screen control for accurate adjustment of power levels and trigger timing, ensuring consistent welding results. Industrial-grade core components (e.g., temperature controllers, electrodes) handle voltage fluctuations, reducing defect rates. Built-in over-current, over-voltage, and over-temperature protection automatically shuts off the machine, extending its lifespan and cutting maintenance costs
  • ✅ Versatile & Wide-Ranging Applications: Multi-material compatibility: Works with nickel-plated sheets, stainless steel, aluminum alloy, galvanized sheets, and more. Perfect for building battery packs like 18650, 21700, and 32650. Handles metal sheets as thin as 0.1-0.2mm. Adjustable power output to easily adapt to different shapes and thicknesses (e.g., battery tabs, various metal sheets). Portable handheld models available for small-scale use at home, labs, or repair workshops
  • ✅ Energy-Saving & Eco-Friendly, Cutting Costs & Boosting Efficiency: Optimized cooling system reduces downtime and keeps the workshop cooler. No need for welding wire or solder, minimizing harmful emissions and meeting eco-friendly production standards. Repair and revive electronic devices (like handheld drills, facial cleansers, or electric toothbrushes) by replacing old batteries with new ones using the spot welder. Save money, reduce waste, and protect the environment

Product Details

Brand:Kerpu
Model:004T
Color:Black-lcd 12000mah

8000W Spot Welder,Handheld Spot Welder,Portable Spot Welder Machine DIY Kit,High Power Handheld Spot Welding Machine,with nickel strip and spot welding pen,for 18650 Battery Pack Welding Tools

Image of 8000W Spot Welder,Handheld Spot Welder,Portable Spot Welder Machine DIY Kit,High Power Handheld Spot Welding Machine,with nickel strip and spot welding pen,for 18650 Battery Pack Welding Tools

Key Features

  • ✅ 🚀【8000W Battery Spot Welder】:The upgraded spot welder with Dual Pulse Output, foot pedal welding mode which can easily weld 0.1-0.3mm thick nickel sheets, you can finish the welding work easily and efficiently, the welding spot is nice and elegant. Can be used for spot welding of batteries, hardware, and electronic components. Screen size is 2.5 X1 CM, Soldering pen Length is 350mm. Sot welder LXWXH 15X9.5X6 CM
  • ✅ 🔋【1-9 Level Knob Adjustment】:The adjustable spot welder can weld thousands of points continuously on nickel sheet after full charge,the solder pins of the adjustable spot welding machine can be removed and replaced, easy installation and operation.The mini spot welder with 9 Level output power adjustment design, you can adjust the output power 0-800A by turn the knob, the larger the value, the higher the output.
  • ✅ 🚀【Easy to Use】:The solder pins of the adjustable spot welding machine can be removed and replaced, easy installation and operation.The DIY battery spot welder machine is foot switch controls welding, spot welding is more arbitrary. Just press the nickel belt with two soldering pens and step on the foot switch. Wait for about 0.5 seconds for output spot welding,then release the foot switch.suitable for precise welding.
  • ✅ 💌【Warm Tips for Beginner】: LCD Screen Display,The battery voltage level is the key factor affecting the spot welding effect.Our spot welder screen can display the internal voltage of the product in real time,it is very convenient for you to check and charge in time.The product should be fully charged before first use, please charge when the voltage on the screen falls below 7.3V.
  • ✅ 📞【Wide Application & Warranty】 The spot welder with large output power can be used to connect nickel strips of 18650 lithium battery, or spot welding iron sheets, stainless steel sheets. And it is also suitable for welding 0.1-0.15mm nickel plated steel sheet and 0.1mm pure nickel sheet quickly. In the process of using the spot welder, please feel free to contact us if you have any quest.

Product Details

Brand:Docreate
Model:SKU930645-US
Color:8000w Spot Welder, Black

5000W Mini Battery Spot Welder, Portable Spot Welder Machine DIY Kit for 18650 Battery Pack Welding Tools, Adjustable Battery Welding Soldering Machine with Nickel Strip and Spot Welding Pen

Image of 5000W Mini Battery Spot Welder, Portable Spot Welder Machine DIY Kit for 18650 Battery Pack Welding Tools, Adjustable Battery Welding Soldering Machine with Nickel Strip and Spot Welding Pen

Key Features

  • ✅ ✔ LCD Screen Display: Designed with LCD digital display, you can directly see the battery level and charge this machine in time. ( Please fully charge it before first use, and recharge it when the voltage is below 7.3V)
  • ✅ ✔ Durable Material: Agoal spot welder has good performance and long service life with ABS housing, two spot welding pens of good conductivity and low contact resistance. The tip is replaceable
  • ✅ ✔ Wide Application: 5000w spot welder is adjustable in output current, spot welding 0.1-0.15mm nickel plated steel sheet and 0.1mm pure nickel sheet, great for welding 18650 battery packs and iron/ stainless steel sheets
  • ✅ ✔ Easy to Operate: Just press the nickel belt with two soldering pens and step on the foot switch, wait for about 0.5 seconds for output spot welding, and then release the foot switch
  • ✅ ✔ Compact Size: Lightweight with 6.5*3.86*2.36 inch body, you can take this machine in different occasions. If you have any questions within 60 days, you will get a replacement

Product Details

Brand:AGOAL
Model:AGOAL20230601
Size:6.5 x 3.9 inches
Dimensions:6.5 X 2.36 X 3.86 inches

Portable 8000W Handheld Spot Welder - High Power Spot Welding Kit for 18650, 21700 Batteries. Complete with Welding Pen & Nickel Strips

Image of Portable 8000W Handheld Spot Welder - High Power Spot Welding Kit for 18650, 21700 Batteries. Complete with Welding Pen & Nickel Strips

Key Features

  • ✅ ✔ 8000W Spot Welder: Features an 9500mAh rechargeable battery for longer working time, great for spot welding 0.1-0.3mm nickel strips, 18650 battery packs and mobile phone batteries. The current flows once, it welds once
  • ✅ ✔ LCD Screen Display: Designed with LCD digital display, you can directly see the battery level and charge this machine in time. (Please fully charge it before first use, and recharge it when the voltage is below 7.3V)
  • ✅ ✔ 9 Adjustable Gears & Easy to Use: Easy to adjust the 9 levels of current by the knob. Just put two of welding pens on nickel strips, hold the foot pedal for about 0.5 seconds until the red light flashes 3 times, then release the foot pedal
  • ✅ ✔ Durable Material: Agoal spot welder has good performance and long service life with ABS body, two of 47cm welding pens of good conductivity and low contact resistance make sure a reasonable length to meet your needs. The tip is replaceable
  • ✅ ✔ Compact size: Lightweight with 5.91*3.86*1.97 inch body, you can take this machine in different occasions. If you have any questions within 60 days, you will get a replacement

Product Details

Brand:AGOAL
Model:646
Size:5.9x3.8x2 inch
Dimensions:3.86 X 1.97 X 5.91 Inches

5000W Battery Spot Welder, Portable Welder Kit for 18650/26650/32650 Battery Pack, 10 Gear Spot Welding Machine, 4.0Ah Rechargeable Battery LCD Display for 0.1-0.15mm Nickel Strip

Image of 5000W Battery Spot Welder, Portable Welder Kit for 18650/26650/32650 Battery Pack, 10 Gear Spot Welding Machine, 4.0Ah Rechargeable Battery LCD Display for 0.1-0.15mm Nickel Strip

Key Features

  • ✅ Battery spot welder comes with 2x spot weld pen of good conductivity and low contact resistance, capable of soldering and desoldering, easy to replace the tip
  • ✅ 5000W battery spot welder is adjustable in output current, spot welding thickness of 0.1-0.15mm, great for welding 18650 26650 32650 battery packs, iron/ stainless steel sheets (not copper or aluminum)
  • ✅ Battery spot welder is powered by a 4000mAh Li-ion battery, powerful enough for continuous welding of thousands of points, with the foot pedal to guarantee precise control
  • ✅ Portable welder kit is designed with a HD digital display, a single glance to monitor the battery level
  • ✅ Portable welder kit has a compact body with ABS housing, safe to use, always keeping a low profile at your busy workbench

Product Details

Brand:VQP
Model:BSW380

Spot Welde, Portable Battery Spot Welder Kit, 11000mA-h 80 adjustable power levels Mini Spot Welding Machine with LCD Color Screen

Image of Spot Welde, Portable Battery Spot Welder Kit, 11000mA-h 80 adjustable power levels Mini Spot Welding Machine with LCD Color Screen

$45.99 @ Amazon.com (Save 8%)

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Key Features

  • ✅ Enhanced Performance: Built with an upgraded 11000mAh rechargeable battery, this mini spot welder features a power bank design and Type-C fast charging, reaching full charge within 3-5 hours. It can execute thousands of welds on a single charge and effectively welds 0.1-0.15mm nickel sheets (Note: Cannot weld nickel strips with thickness greater than or equal to 0.2mm thick).
  • ✅ Adjustable Precision: The spot welder Offers a wide range of 80 adjustable power levels, allowing users to fine-tune welding settings from 1-8 and 1.1-5.4-8.0 for different materials and thicknesses. Ideal for both beginners and professionals, If you are a novice, we recommend setting the delayed auto weld time to (1-5 seconds)
  • ✅ Clear LCD Display: Battery Spot Welder Equipped with a colorful LCD screen that provides real-time information on battery status, delay time, temperature, and gear level, ensuring you remain informed and can adjust settings easily during your welding projects.
  • ✅ Safety and Convenience: Integrated with an advanced chip for adaptive control and temperature monitoring, the DJYIYEW spot welder automatically shuts off when temperatures exceed 60°C/140°F to ensure user and equipment safety. Its compact design enhances portability, making it an excellent tool for various applications.
  • ✅ Versatile Use and Complete Kit: Perfect for welding nickel sheets and capable of handling cylindrical lithium batteries like 18650/21650, and nickel-metal hydride or cadmium batteries. The kit includes everything needed: 1 x spot welder, 4 x nickel strips, 4x4 battery holders, 2 x welding pens, 1 x metal file, a USB-C cable and 1 x Manual.

Product Details

Brand:DJYIYEW
Model:13097-8
Size:11000MAH+Battery holder
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