Internal resistance in lipos

[RobW]

I have three packs of Nvision 7200 100c 1 cell lipos I use in my gt12, all about 6 months old and used in rotation so similar usage

When charging them on an Orion advantage touch pro I get IR figures of 2.1, 3.8 and 5.2 for the three packs - m and symbol I cannot get on my keyboard.

I appreciate the actual figure is probably fairly meaningless unless the charger has been accurately calibarated but does anyone have any idea if these differences are big enough to actually make a noticeable difference? I feel like the one with the highest IR is the worst performing but not sure if it is all in my head...

Rob