I didn’t hear about the double positive method. How it can be done?
We have to find out if the unit is really degrading with use and what causes it. Maybe even send one welder to @tatus1969 for inspection. I think he knows better to diagnose something like this.
We need more opinions from users who regularly use their kwelds with +10k welds. I don’t really know the guys who builds batteries but maybe you can tag them.