There are 4 distinct sizes of test pads. I'll call them tiny, small, medium, large

The large pads appear to relate to the battery cells

The medium pads appear to be internal voltage test points

The small pads I'm not sure yet

The tiny pads I'm not sure yet

TP18 changes from 0 to 5VDC when in test mode

Each cell has a S# pad that removes the cell from the circuit. This causes a

001734242,AFE voltage invalid␍

AFE = Analog Front End = U6 = QB7693003

message to be displayed on the serial output.