I'd be afraid I would blow the battery or batteries up trying that.
That is the thing that concerns me and is the main reason I asked about it. There are a bunch of YouTube videos of people welding with batteries, but I would suspect that anyone who blew up a battery would probably not make a video about that.
jmudler, I've seen several recommendations to put a microwave transformer in the system, so it isn't a wild idea. But I don't know where to get one and don't know how to hook it up either. There are some videos of decent welds that people have made just using car batteries, and I got to think that 6 volt cart batteries would be much better. I don't see any reason it would damage them as long as I didn't pull too much power out, and I could monitor that closely.
When I say this is a small job, I'm talking about welding a 1/2" coupling back onto the trailer for the hitch pin to go through. I need to run a 1/2" bead across another place to strengthen a crack in the frame. And I need to tack the wire floor back to the frame in several places. This is 5 minutes of work with an arc welder, but when you ain't got one you have to consider alternatives.
Turkey, thanks for the offer. I will probably take you up on that at a time of your convenience. But I am still curious as to whether or not the battery method would work.
