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Spot Welder DIY Kit Portable Battery Energy Storage Spot Welding Machine Small PCB Circuit Board Welding Equipment for 18650 26650 Battery
Feature:
1. Pure copper conducts heat conduction, greatly improving the efficiency of spot welding.
2. The two-sided outlet is convenient for spot welding, and it is marked in Chinese, and it is not easy to connect wrongly.
3. The high frequency capacitor has low internal resistance and can withstand high temperatures of 105 degrees Celsius.
4. Super thick red copper tube, 10AWG wire, aluminum oxide copper spot welding needle, to ensure the over-current capability and durability, and greatly improve the spot welding efficiency.
Specifications:
Voltage: 12V
Main Color: Green
Main Material: Metal
Common Working Power Supply:
12V car starting power supply
30Ah-35Ah capacity lithium battery pack
12V 20-45Ah lead-acid battery with good performance
2S.3S.4S model airplane lithium battery pack
3 series high-rate lithium battery pack
Note:
1. Due to the light and screen difference, the item's color may be slightly different from the pictures.
2. Please allow 1-3cm differences due to manual measurement.
Package Included:
1 x Circuit Board
2 x Roll Nickel Sheet
2 x Connect Cable
2 x Spots Welding Pen
4 x Sets of Screw
2 x Heat Shrinkable Tube
Peter
2025-08-25 16:04:45
So far I only tested it with two 12.6V 2.2Ah 35C rated lipos (each is rated @ 77A continuous discharge) and it seems to work really well with provided strips and scrap / dead batteries from old laptop. I decided to solder all the wires to hopefully reduce any resistance and made a very basic plastic backing plate. The XT60 connector now is probably the highest resistance point.On setting 6/8 it welds strips decently, but I still can somewhat pull them off. On setting 7/8 it welds strips well enough that if I try pulling them off they rip apart instead breaking the welds.For testing, I welded strips to 6 batteries, 2 strips to each, 3-4 pairs of welds each strip, and whole thing - ends you hold, board, and batteries got warm.The other welders sub $100 here that come with built-in batteries were much weaker than this welder. Tried two different brands and even on max setting strips were easy to pull off.If you have good power source like high current lipos or car battery then go for it. Now I can finally rebuild the pack for the robo vacuum cleaner, as buying quality battery for it is next to impossible.Like other reviewer here wrote, make sure the tips are clean and sharp.
Christy Wolfe
2025-08-23 10:52:38
The Welder requires 90 to 130 amps. You'll need a battery with a high discharge rate (denoted C). Take the mAh rating/1000*C to get the maximum current in amps the battery is capable of supplying. LiPo batteries for RC cars are a good choice (you will need to replace the copper lugs on the battery side of the welder with XT60 or XT90 connectors to make the attachment).Speaking of the lugs, they are rated to 20A which is odd but they seem to work. I've soldered all around the crimps to help them out.Anyway, it's working better than advertised for me. I suspect the people who aren't satisfied need to take a look at their battery.
crazylare
2025-06-24 15:31:54
I got this mini spot welder to try and make some good batteries out of several bad batteries. You need to spot weld the nickel strips to the ends of the batteries and I was hopeful this welder would do the job. I used the thinnest strips that came with the welder and it just wasn't hot enough to actually make the strips stay in place even after several tries. It however did do what it was suppose to do, it arced and made tiny little spot welds on the strips. All it would have taken for this unit to be great was just a little more power. It was close to spot welding the strips but just not quite. I gave up on using several batteries to make a few good ones because I'd get them almost done and the strips would come off. I sent this back to Amazon and they refunded my money quickly! Kudo's to Amazon!
Nicholas Shepro
2025-05-18 14:51:13
I 3D printed a case and a grip for it. Probably my battery, but sometimes it barely welds and others is burns through the metal. I am using an old deep cycle battery while connected to the charger, but at least I do have eye protection on .
Customer
2025-05-07 15:30:10
Tried numerous different ways to power it. Spent 150.00on a new battery to the manufacturer spec's and it still will not weld even the thin nickel strips that came with it ..
Bubbles
2025-04-22 15:52:32
Worked as described
Lisa Boritzki
2025-02-12 10:36:08
The welder works great after I practiced a little. The down side is the only instruction sheet with it is in Chinese and the input and output terminals are marked + and - so small that I had to take a picture and enlarge it to make sure I got them right. The copper electrodes are easy to short out ( taped them up) I wrapped the board in a clear plastic bag to protect it.
Breck T
2025-02-05 15:04:24
Have already spot welded multiple packs together with it and it works great.
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