wingerr what came of the batteries? did they work after charging?

wingerr I got the same version you show, it doesn't allow repeated welds without having to reset and arm it first by pressing the button. not good if you need to make a large number of welds. it's okay if you only need to do a few.

wingerr what picture was attached?

wingerr what did you use as a power source?

wingerr what kind of current was the mosfets switching with your modifications?

wingerr works best if you don't press too hard on the electrodes. it needs contact resistance to develop the heat required to weld. just apply enough to make contact and don't try to make it more better by the force of will-

wingerr thing is downgraded, not up. no beeper and need to reset each time you start a weld.