Thanx Mike, Kchriste and Hero999 for the susgested solutions.
Kchriste: Yes, I would have to charge the cells at one time and discharge them at some other time. What ever the case, the Mosfets must be BETWEEN the cells as drawn.
I believe the issue is, the Gate Source control voltage and potential between the cells.
Kchriste: Can you post a sketch?
Mike: Can you, please post another diagram. The one you posted is not very clear (parts of the circuit not visible)
Thank you