well, an update...
My old sulfated 12v car battery now holds a fluffy charge of 11.x V after a few hours of IRO treatment. It drops to 7.x V on cold nighttime still, but jumps back up after a few minutes of treatment. Haven't really tried the trickle low-amp charge yet, just the IRO.
It does something neat now, though.
I can run my little 350W older inverter off it for minutes without the inverter going into low-V shutdown (beeeeep!) after a few minutes of IRO charge. If I plug anything into the inverter (even a little digital clock) it runs a few seconds then shuts down.
However, I thought I'd sacrifice my older inverter for testing. Didn't know if anyone else had dared risk an inverter to see if it could run off the charging battery on an IRO setup without it getting fried by the spikes

so I though I'd give it a go.
Well, short story long, it works. A cheap little 350W modified-sine 12v to 120v inverter. When the IRO charging output is hooked to the same battery that runs the inverter, the inverter can run the digital clock as long as the IRO is running. The most interesting thing... You know how digital clocks flash 12:00 when the haven't been set? It flashes 1 flash/second I believe... well, when the IRO is hooked up to the battery with the inverter on it, the clock flashes faster! NOTICABLY faster! I assume the frequency of the AC is being modified somehow from the IRO being connected to inverter input (with the battery there to control the voltage, support surge demand, and moderate the spikes...)
Also, somewhat unrelated:
I read elsewhere on this forum someone using welding xformer parallel with coil primary? I tried it, since I had an old 110v junky welder laying around.
Don't remember exactly how I had it hooked up when it 'worked'... very scientific, eh?
But, I was getting 100V-300V spikes off whichever end I was using for output showing on my digital meter when I connected to the coil primary with jumper cables. Touch the + cable to the welder xformer terminal while IRO running, fuses relay and produces lovely spike. Flick/thump relay and try again. Another spike. Sometimes runs for a second or two before relay fuses. EEK!
So, interesting, must play more later.
After fusing relay a bunch of times, took case off to clean terminal contacts and look for diode. Couldn't find diode, cleaned contacts with metal nail file

but it still worked afterwards. Much quieter with case off as per another suggestion on this forum. Noticed another interesting effect as well. The relay contacts have a lovely blue arc between them most of the time this IRO is running, it only cuts out for fractions of a sec at a time, and not in a predictable pattern.
Neat stuff! I now have 3 batteries which seem to be in better shape than before I started using them to experiment with this for a few hours, IRO treatment only (no conventional charging yet), and this is really psyching me up about trying something like earth battery to supply IRO...
YeeHaw!
Thanks Imhotep for open-sourcing this data!
