Sunkko 737g Pulse Spot Welder for 18650 and 2170 Batteries

Sunkko 737g soldador de puntos con display digital y pedal de maniobra

Detalle del Sunkko 737g maquina soldadura puntos para baterias 2170

Vista lateral de la Sunkko 737g maquina soldadura de puntos

Sunkko 737g Pulse Spot Welder for 18650 and 2170 Batteries

Name: Sunkko 737g Pulse Spot Welder for 18650 and 2170 Batteries
Brand: Sunkko
SKU: sunkko737g
Price: 116.86 EUR
Availability: InStock

Brand: Sunkko

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116.86€

VAT included (Ex VAT: 95.01 €)

Volume Discounts

Quantity	Price	Save
2+	105.78 €	-9%
10+	103.32 €	-12%
20+	92.25 €	-21%

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Express delivery Wed, Apr 29 - Thu, Apr 30

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The Sunkko 737g Pulse Spot Welder is a compact and efficient tool designed for welding metal strips and joining 18650, 2170 and similar battery cells. It is perfect for repairing battery packs in devices such as laptops, power banks, electric vacuum cleaners, drills, tools, electric scooters, electric bikes, hoverboards and electric car batteries. It is also ideal for custom battery pack assembly.

This model is the smaller brother in Sunkko's spot welder range, offering a balance between functionality and a competitive price, without sacrificing quality or power.

Key features

Microcontroller-controlled pulse welding with a maximum current of 800A.
Ability to weld strips with a thickness of 0.1 to 0.2 mm (0.15 mm for pure nickel strips).
Pulse selection: one or two, with a fixed duration of 5 ms.
Digital display to select power from 1 to 99 and show welding current.
Includes a foot pedal for greater comfort and precision.
LED light under the welding points to improve visibility and accuracy.
Microcomputer with double pulse control and fine adjustment up to level 199.
Foot switch and pressure adjustment to optimise welding quality.

Technical specifications

Input voltage: AC 220 V
Primary current: 2-15 A
Welding current: 50 - 800 A (pulse time from 1 ms to 19 ms)
Weight: 4 kg
Dimensions: 140 x 245 x 200 mm
Welding thickness for strips: 0.1 - 0.2 mm (0.15 mm in pure nickel)

Important note: Due to the high instantaneous power draw, it is recommended that the electrical installation has a 40 A or higher RCD and earth connection to avoid the protection system tripping repeatedly.

Common uses

Repair and assembly of battery packs for portable electronic devices.
Welding batteries for power tools and household appliances.
Assembly and maintenance of batteries for electric vehicles and urban mobility.

Compatibility

Compatible with 18650, 2170 and similar cylindrical batteries, as well as nickel strips for welding. Ideal for users who need precision and power in battery spot welding.

Microcontroller-controlled pulse welding up to 800A for 18650 and 2170 batteries
Welds strips from 0.1 to 0.2 mm thick (0.15 mm in pure nickel)
Digital display for power selection and current readout
Includes foot pedal and LED light for greater precision
Double pulse control with fine adjustment up to level 199
Input voltage: AC 220 V, primary current: 2-15 A
Compact dimensions: 140 x 245 x 200 mm and weight of 4 kg
Requires an electrical installation with a 40 A or higher RCD and earth connection

Customer Questions & Answers

What are the dimensions, weight and contents included when purchasing the Sunkko 737g?

The Sunkko 737g measures 140 x 245 x 200 mm and weighs 4 kg. The package includes the machine, foot pedal, power cable and user manual. We recommend checking with the seller whether it includes spare electrodes or additional accessories.

What kind of preventive maintenance or spare parts are usually required to ensure the unit’s durability?

The main maintenance focuses on regularly cleaning the electrodes and replacing them when they show wear or contamination. The manufacturer usually offers replacement electrodes. We also recommend periodically inspecting the cables and foot pedal for signs of mechanical fatigue or poor contact.

What are the main operational differences between the Sunkko 737g and higher-end models from the brand?

The Sunkko 737g is more basic and has fewer advanced functions than higher-end models, such as less waveform adjustment and a narrower range of acceptable strip thicknesses. It may also lack some protection systems and automation found in premium equipment. Its strengths are simplicity and a competitive price, making it ideal for occasional users and small-scale work.

What type of batteries is the Sunkko 737g suitable for?

It is suitable for 18650, 2170 and similar cylindrical batteries used in portable devices and electric vehicles.

What is the maximum welding current this machine supports?

The maximum welding current is up to 800A.

What strip thickness can the Sunkko 737g weld?

It can weld metal strips with a thickness of 0.1 to 0.2 mm, and up to 0.15 mm for pure nickel strips.

Does it include accessories to make operation easier?

Yes, it includes a foot pedal and an LED light to improve precision during welding.

What electrical requirements does this machine have?

It requires an electrical installation with a 40 A or higher RCD and earth connection to avoid repeated tripping due to the high instantaneous power draw.