Flexibility of chargers to handle 2, 3, or 4 cells

I’m working on a new medical product with a cost-effective battery charging circuit for a Li-Ion battery pack, but we haven’t decided if it’s going to be a 2, 3 or 4 cells in series battery pack.  In looking at the BQ2057W it seems like it should work with 2 or more cells as long the BAT (voltage sense input) pin is connected to a an appropriate resistor divider to scale the battery voltage down to the 8.4 V it expects to see. Is that the case or are there other gotchas I’m missing? Are there other charging IC solutions that would give me some flexibility regarding the number of cells in the battery pack?