Thanks for the additional info. No doubt that the Li batts are a good thing.
I still don't understand how the percentage SOC can be at all accurate, but OTOH you don't need it to be. And I don't have to figure it out, thank goodness. I guess you "have to be there" to see how it all works.
IMO Li does not change the general monitor situation that has been explained to the OP. In all cases, the monitor must be reset often enough using other meters/evidence to keep it from becoming off-kilter and giving misleading info.