This company (and the 3 others I checked) assembles a complete replacement set of reconditioned and tested cells ..........
You can do pretty much NOTHING useful to "recondition" a battery cell.
It will still be an OLD cell, with a correspondingly shorter life.
The story about getting them in the right order is just blowing smoke.
IF.....you don't get an entire set of brand NEW cells, then you still have an OLD battery.