My plan for the battery is to order one of the adapters for lithium-air hearing aid batteries. I just don't want to order it until I know for sure.
I pretty much decided that I wanted an inexpensive RF, didn't want the headache of a Russian built, wanted full manual control (which knocked out a dozen of otherwise cool little RFs) and wanted it to be sufficiently different from my AE-1 with 50mm F1.8 that I wouldn't spend forever trying to decide which I wanted to shoot with on any given day.
Because the Minister 700 was up when I was looking it didn't seem as rare as reading suggested. Given than I'll probably be only one of two people I know who even own an RF, I could have gotten a Canonet 28 and felt like I had a rare camera