Is the FNIRSI SWM-20 the Best Budget Spot Welder (Unboxing & Test)

Unboxing and putting the new FNIRSI SWM-20 Spot Welder to the test! In this video, we take a look at what comes in the box, check out the color screen and settings, and do some live test welds to see how it handles battery building. Is this the ultimate portable spot welder for DIY battery packs? Let's find out! If you found this video helpful, please give it a thumbs up, leave a comment with your thoughts on the SWM-20, and don't forget to subscribe for more unboxings, builds, and electronic troubleshooting!