Review on 🔋 Portable Mini Battery Spot Welding Machine Set for 18650 Lithium Battery, Household Spot Welder with Nickel Belt & Rechargeable Power Tools by Alan Miller

It's a bit finicky, but once you get the settings right it works pretty well for what it is. The instruction manual is entirely in Chinese, the cables are very short and a bit chunky, and the electrical contacts are not interchangeable. There is actually a simple guide on the back of the device so be sure to check it out. It cost me $15 so I feel like I got my money's worth.