Okay.  Thanks.  The issue here is that the documentation TechKnight sent me about the battery EEPROM resetter suggests that its primary benefit was that it worked directly through the battery connectors.  i.e. you install it on a laptop and can reset that laptop's battery.

I don't think it'll work but if one could get Win 98 (or w/e) running on a PowerBook, and if - and this is the real problem - Windows can actually recognize the battery at all, it might be possible to rebuild batteries using no additional hardware.