Using a discharge rate of 20A and 1.1V as cutoff voltage, the cells with a red dot had less than 19Ah capacity before reconditioning.
Darker colour signifies deeper layer inside the packs (three layers).
It is extremely unlikely that the distribution shown is due to chance.
All but one cell with lowered capacityare located in the bottom layer of cells.
Any ideas what would cause this difference in capacity?
Radiant heat from the road? (Australia, hot here in summer)
Bottom layer gets hit by air flow first, including aerosols like ocean salt sprays.
Physical pressure of double it's own weight on top, coupled with g-forces due to being located ina motorcycle.
Deliberate accumulation of low capacity cells in the first layer during some stage of assembly (but some of the highest capacity cells were in the bottom layers, too!)