Batteries diverging from each other - my own fault?

First: Thank you for your time reading and replying to my post!

I think you have misunderstood me in one point: I'm talking about two married pairs of LG HE2 in which the problem occurs (the same I had with some E-Stream cells), while on the other hand the HG2 I have are still fine after years of usage (I vape at rather low power settings which might contribute to that).
I use a really good analyzing charger, the old HG2s still haven't reached the "threshold" of lost capacity to make them end-of-life, while the HE2s are way newer, way less used and have developed that massive difference between both cells in both married pairs.



I keep enough batteries in use that there are always at least half a dozen in the rack ready to go. I charge them up as soon as I take them out of a mod so they sit in the rack fully charged. Years ago I did look into whether it was bad for them to sit around fully charged. Apparently it is, but the difference is minimal. If you leave one fully charged for a really long time it would suffer a small amount of reduction in its lifespan.
Thank you, that is exactly what I wanted to know and it answers my question why my HG2s, VTCs and Molicels haven't suffered from sitting sometimes charged a few weeks in the shelf waiting for their next shift :)
Only question remaining is: Why didn't the HE2 and E-Streams "survived" that conditions - or if it wasn't my usage but rather bad luck with them.


Again: Thank you very much for reading and answering and

Greetings from Northern Germany,

Axxe

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