Battery power is monitored continuously to provide ... allowing operators to quickly and easily fine-tune the welding arc for their desired output on different materials and thicknesses.

That need is what led [Erwin Ried] to purchase a small, battery-powered spot welder from a maker in Korea and test it out on nickel strips. The spot welder [Erwin] used is the work of a user by ...

The one in the video is based off an old design that used a 12V battery and without any fancy ... drastic — so he hooked it up to an arc welder to fire the projectile using 22V and 200A.