M18 batteries nomenclature confuses me

Saw the deal at HD about a 12 mAH high output and a 8 mAH high output “xc” battery. I’m confused. Nothing is as xc as a 12 mAh battery. Am i missing something?

I’m pretty sure this is how it goes.

CP: 5-cells (Compact)
XC: 10-cells (Extended Capacity)
HD: 15-cells (High Demand)

“High Output” is reserved for batteries with 21700 cells.