So I finally broke out my good charger, it's a Revolectrix Powerlab 6, and it'll do just about everything but blow your nose. The up/down side is, it requires a separate DC power supply, anything from 12-32 volts. I've been running it on a 24 volt AC to DC switching power supply, but you can also run it off an ordinary 12 volt car battery if you wanted to. Anyway, one of its many features is cell IR, and it looks like the battery I got with my used TH is in pretty good shape, I got 4.0, 3.3, 2.9, and 4.1, for a total of 14.3 for the entire pack. I still haven't charged my new battery, so no comparison yet, but if memory serves, that's not bad. Yeah, I realize it would be better if they were more closely matched, but I've seen worse, even on brand new packs. So for those that can measure IR and track it, what are you seeing as typical? BTW, the battery in question is one of the Ultra X 6300 mAh. Later.
Dave
Dave