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4.83 out of 5
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  • 10/01/2022

    Mini spot welder for making battery pack of 18659 cells. Teardown: This spot welder comes with a 4300 mAh li-poly battery, which can deliver current up to 600 A. It has a type-c USB port for charging. This spot works in two modes: Automatic and timing mode. In automatic mode, this welder turns on after 1 sec when touching the nickel strip and in timing mode, it turns automatically on every 1.5 seconds for 1 sec. Timing mode is useful for continuous welding and automatic mode is suitable for a few welds. We test this welder over a large number of Li-ion and AA cells. The welding quality is very good and strong and stable. We will recommend this product. his spot welder has two Lithium-polymer batteries of 2150 mAh each, which can deliver up to 600 Amperes of current. There is a small microcontroller inside this unit that drives the combination of 4 MOSFET to deliver the current to the welding probes. And also, there is a tiny IC for charging batteries inside this Mini module. Working on this Mini spot battery is very simple. Current from the batteries is modulated by MOSFET with the help of a microcontroller. This high current is then fed to the welding Probes, which has very small resistance as compared to nickel. When heavy current passes through these probes to the Nickel, Nickel melts up and because of the small pressure from the probe tip, the nickel beneath the probes melts and penetrate inside the bottom metal. This makes the welding. Welding strength depends upon how far the nickel is penetrated inside the material which depends upon the welding current, nickel ate thickness and bottom metal type.

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  • 07/09/2021

    The item arrived with completely discharged batteries, this is not good for the life of the batteries themselves, the product has conducting current bars in brass, not copper, the description is not true, however after charging the batteries it seems to work properly in the next few weeks I will do some tests on the current delivered

    Comments (3)
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  • 30/08/2021

    perfect device for my needs. everthing seen is done on setting 2 of 4. on time i maneged even on setting 2 to burn a hole. tips seem to hold up after 50 welds or so

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  • 28/11/2021

    Ordered from 15/11/64 of the day 27/11/64. Think about how long it will be to try it and good at this price. Let's test it for a long time. Will review again.

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  • 21/11/2021

    Thought it was faulty first sinne batteries came discharged. Took a few hours to charge it up fully and now works like a charm om the 0.1mm nickel strip included. Going to try a build of battery pack with 0.15mm nickel, also grinding abit on the copper pins as stated by another reviewer. All in all it does what it says!

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  • 20/09/2021

    Item arrived promptly, the internal battery is discharged so it needs a really good first charge to get it up and running, comes with some nickel strips which is quite handy. Instructions are in Chinese so will need to look at YouTube for any instructions or search for something written in English. Otherwise it all looks good and will be tested soon.

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  • 30/12/2021

    A good product for the price, nice kit including some strip.

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  • 07/10/2021


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  • 23/09/2021

    great product

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  • 07/09/2021

    Fast shipping for Italy from CZ. I had some doubts about these cheap welding tools, but this one really surprised me. I used the timed mode for welding and I was able to weld easily some nichel strips (already include in the package) for a battery pack. I find It great for occasional use.

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