H1 Handheld Spot Welder

I was surprised at how well it works. It charged quickly and was ready to use. The automatic welding feature worked extremely well. Makes me wish I had more to weld! Came with tape and extra welding tips (pens). This video is set at power level 5 of 11 and it welded with ease. Great product.

Works great! DOES NOT WORK ON 0.2mm STRIP, highest energy setting was dimpling the metal but not nearly hard enough to weld. Never used a battery spot welder before this. Very easy to use. Bought for rebuilding a M18 5ah battery pack, and it holds just enough charge to comfortably do all the spot welding needed on one battery pack. It charges "quickly". I'd recommend using some light scotchbrite pad every few welds to clean the electrode tips.

Works great, I wish I knew about this device years ago to recycle the batteries of my drills.

Was looking for a way to connect 18650 battery's. This will not spot weld .15mm thick nickel strips. It almost works with the .10mm nickel strip that it comes with, but only at the highest voltage and only if you adjust the distance between tips. And even then, it will blow holes in the strip sometimes, do nothing sometimes, and weld occasionally. Now it has just stopped working entirely. Just won't even activate, and was difficult to activate even when it was working. Took two hours of experimenting to get 7 battery's welded together on one side poorly, and now it won't do anything, I want a refund.

I have tried the style of spot welder with a big battery pack and 2 long wires to the contacts, and yes, they work. This spot welder saved me an immense amount of time in rebuilding my DeWalt lithium batteries. Wow. Fast, easy, solid spot welds, and the battery lasted impressively. After 3 completed batteries, so 30 cells and 60+ connections of 4 welds each, this unit still had battery left and was functioning perfectly. It did get warm in the hand and I hit the thermal shutdown threshold once when I was working fast. It got warm (not hot) and stopped welding for a few minutes, cooled down and kept going. Not a big deal since I used the time to solder the balance leads on. So far I really like it would buy another if continuous production were an issue. Swapping between 2 of them could keep a person welding nickel strip all day.

This is what I learned after putting together 60 batteries. This welder is good, but it has to be on its terms. First, don't use this on tabbed batteries. That was a mistake. The tabs are thicker than the included nickel strip and the welder will have about a 50% success rate and welds break with the slightest mechanical movement. If you have tabbed batteries, cut the tabs off. The nickel strip included is perfect. Get more of that. Second, I noticed you get about 4 really good welds before needing to wait a minute. Seriously, once I learned to use this with a 60 second timer, things went a lot smoother. Third, the instructions will get you basic button operation, nothing more. Watch some videos if you never used one before. Once I learned about the tab problems and required time delays, I came to appreciate this little welder.

The automatic mode works great, but the manual mode takes a little bit to get used to. Because if you hold the power down for more than a few secs the unit turns off, you have to almost tap the unit to get it to work in manual mode. However, it is a very minor thing as the auto mode puts out nice even welds very easily. The instructions are simple to understand and the extra nickel strips and sand paper are a nice extra addition. Overall very well thought out packaging. Worth buying.

UPDATE: JULY 30, 2024 - Dead! No longer takes a charge, will not turn on. 10-sec reset had no impact. Worked well while it lived, but it did not live long. I took it apart. The battery has 3.8v (4.2v max according to the manual) but there is no one is home (no lights). Nothing looks fried or disconnected... just DEAD! The first welder I received was a total failure. It was totally dead on arrival, charged in 30 mins, died in 5 minutes and never produced a single weld in any “gear”... just BEEPED. It would not work, even when plugged into a 2 amp USB power source. I requested a replacement, which Amazon sent promptly. I left the new welder on charge overnight, just to be sure. While there are some apparent quality issues, it seems solidly built and is easy to use. I have only made one NiCD battery pack using 4, 1/3 AA cells. It worked very well and made 12 welds without need to recharge. It does the job. The attached video is just an example.

Funciona bien, solo hay que entender bien las funciones que vienen en el manual

After shopping and reading reviews (all over 4 stars) I have decided to take a chance with this one… Bare in mind that I have only tested it for 3 welds on 18650 batteries Yet results are beyond expectations If you take a look on my actual images, not only the weld was strong using 0.2 pure nickel strip, it teared up the strip when I had to use pliers to take the battery off the strip, * using the highest gear (11) and respecting the recommended 45 degrees angle: I have yet to use it for several hours but so far everything points to a solid cheap option. Bought with my own money, not sponsored, in Quebec, Canada I will update if major flaws arises Cheers