【Mini Portable Design】: Portable welder size is 9.8 * 9.45 inches, the weight is only 3.3 pounds, the use of one hand is very easy, the compact design can let you carry, and equipped with an ...

(Use science for peace please!) I did really need a spot welder though, and there was no shortage of examples of people who had built their own from supercapacitors, typically in the 500 F range.

The spot welder [Erwin] used is the work of a user by the name of [aulakiria] (link is Korean, machine translation here) and is designed to be portable and powered by batteries commonly used for RC.