Roman shared this electrifying clip of his DIY mini battery-powered welder in action—and it’s a total game changer. Compact, ...

This video shows you how to create a simple, battery-powered welding machine using basic materials. It’s an amazing, smart solution for DIYers and professionals looking for portability and ...

[Aaron Christophel] has a battery spot welder that costs a not unreasonable 30 euros and can also be used as a novelty power bank. He subjects it to a test and teardown in the video below the break.

I did really need a spot welder though ... limiting resistor to the battery while also holding a multimeter in place, or connecting a large variable-voltage power supply with current limiting ...