That need is what led [Erwin Ried] to purchase a small, battery-powered spot welder from a maker in Korea ... and is designed to be portable and powered by batteries commonly used for RC.

I did really need a spot welder though, and there was no shortage ... seems to vary between ‘large firecracker’ and ‘small hand grenade’, both of which I prefer less.

and spool gun welding. This product is designed for the small shop, the farm, maintenance, repair work and more. At 41-lbs., the portable POWER MIG 211i has multiple lift points and inverter ...