LY, you are the scientist! My brain hurts too much trying to follow the voltage drop vs the angle of the dangle or whatever like you do. You do know where you are at all times, which is what counts.
The main thing is for people to keep track somehow! Total accuracy is not required for my situation, but it might be more important for others, especially if they have AGMs so they can't use an hydrometer.
Mex, I do worry, based on what you have posted, that I am living in a fool's paradise. I would not be surprised if my batts look good now, but have hardly any positive plate left and also have antimony poisoning and battery syph or whatever, so they have only two more cycles to go. :( I can't tell. All I can do is carry on carrying on.
The worst that can happen is I might have to buy new batteries, each of which costs the same as a tank of gas for the truck.
