Upgraded Enhanced Rechargeable Portable Spot Welder Machine 11 Gear Adjustable Mini Small Battery Spot Welder DIY Spot Welding Nickel Strip and 18650 Battery Type-C Fast Charging 5M Nickel Strips

I bought this to rebuild a dewalt 20v Max 4ah battery pack. I used this to spot weld the battery connectors to the batteries just like oem. It work great. No problems setting up and using.

I wasn't sure if this would be that good, as I had never spot welded prior to owning this. However I was able to make my first battery pack with this and it works really well. It was good enough to spot weld and entire 3s5p 18650 pack and still has well over 75% charge. I did use the highest setting though, as the lower settings didn't seem to make a solid weld. Would I recommend this to others? Yes, especially if you're like me and want to experiment with spot welding instead of soldering batteries together. While I know how to solder and I've been doing that for years, I simply didn't want to solder batteries together, it just seemed ghetto. This spot welder however let me make a nice and solid battery pack.

Have only tried it on a couple of test welds. But it works as described. Easy to use, love the included nickel strip. This one does not have the LCD display, but honestly does not make any difference to me, it works great. One day shipping was fantastic..

Great product! Works as advertised. I keep it plugged in to mains power to maintain consistent spot welds throughout the entire build, with no adjustment needed.During prolonged use, the factory leads do get quite hot. This is a good indicator to take a break, and let it cool down. Hot leads while uncomfortable to hold, also have an increased resistance due to the higher temperature. (physics) This extra resistance will cause inconsistency in your welds.Leads are modular, so you can upgrade to whichever works best for your project.Overall 5 out of 5 stars

I struggled with this product for 2 days before I did some research and realized I was using it all wrong, completely backwards.If you hold the probes straight up and down, and also push really hard, there is very little resistance through the metal you're trying to weld so the current just goes straight through no problem, hardly creating any heat, usually not even welding the strip at all. If it does stick, you'll be able to pull it off with ease.The solution is to use very LIGHT pressure, only push hard enough to make contact with the nickel strip and the top of the battery, and use the SIDES/corners of the probes. Using the edges of the probes gives you a much smaller surface area of contact, which means more resistance, MORE heat in a smaller area, which is what is required to make a proper weld. This product description even has these tips listed, which I unfortunately didn't see or read initially.Once I started doing it proper, holding the probes much more gently, and at like a 45 degree angle, immediately my problems were resolved and I started getting absolutely amazing welds. Super strong, can't even peel them off without using pliers (which just rips holes in the nickel), and that was only on a 3/6 power level...I was about to send this product back for a refund before I finally did some research and learned these tricks. I immediately went from disappointed to super impressed. I love this thing, it's welding really great now that I know what I'm doing, and it's upsetting because I now know that almost every negative review here is due to the person not using the device properly. This thing isn't underpowered, the users of this product are just under-educated. I'm glad I was able to figure this out before I returned it, and I'm hoping more people will see my comment and learn the same. At this point I own 2 of them, and I'm giving it a 5 star; I've had no problems since learning how to use it properly.Thanks!!

Hello , I had wrote a review about a month after buying ! But I doing a six month review and is was a good spot welder in the begoand work good for about 4 months and then I had a lot of family emergency so I put my battery making to a stop and I toke it the other day to get back to making batteries and this thing in a full charge doesn’t even want to spot the thins nickel strip out their ! I was so happy when I got it I thought I found the perfect one I even recommended to some friends ! And I went to try and get a replacement and the company said no they only give you 30 from the time you buy it not when you get it ? So now I have a paper weight for my desk until I find the next perfect one ? Do buy and please do some more research before buying ? Good luck and also check with the warranty or if you can buy warranty buy it?

This unit worked great until it didn't. I put together a few 18650 based battery packs and all the welds looked and felt great. On the last pack I assembled and half way into the welding, the leads seemed to not sink into the nickle strip as much as before but was still producing OK welds. I then upped the power from level 3 to 4 and that seemed to do the trick. fast forward a week and I am about to assemble another battery pack. this time the level 4 setting was not getting the job done. The nickel strips were barely deforming and definitely not welding to the battery. I pulled the batteries off the work bench and just tested welding nickle strips together at various power levels 1-6. none of the power settings were producing a weld at all now. If the electrodes were on the same side of the nickle strip, it would not weld. I could only get it to weld if i pressed on opposite sides of the nickel strips. I then decided to wipe down all the connecting surfaces with powerful cleaner/de-greaser (techspray E-line flux remover) just to make sure my leads were not to blame. and yes, i had been scuffing up the copper tips routinely to make sure pure copper was touching the welds. It just feels like something gave out but didn't fail entirely. The battery was fully charged so I am not sure what is going on. Since there is not much I can adjust or switch out, I guess I will need to buy something new. I like how compact and easy to use this was but I'm going to have to try something new this time.