@hetfileld
Battery is an assembly of cells, connected in series, each cell consists of one or more sub cells in parallel. Whether the sub cells are in the same housing does not matter.
Yes, but how can a charger/BMS look after the sub-cells?
It can't and it does not have to as the sub cells are all parallel.
They have their own social life. The rich feed the poor until dead.
Right, since life began, or energy that is.