Edit: I see where the confusion is… I was just re-affirming what you (@Newshound) said about it not constantly charging the battery, because that isn’t done for this type of battery chemistry.
Okay, so for example, maybe internally it allows the battery to drop to 80% before recharging to 100% again while the entire time always reporting as 100% charged.
I think I would have noticed by now because I’ve tweak it to barely finish the job on both my floors.
Otherwise, if it’s like a percentage or two, then that would be what I would normally expect to happen. I don’t know how much of a % gap you were thinking of.