So one person who has been against pretty much everything I've ever posted on this forum comes up with some claim that Tesla does NASA style testing on every cell with no evidence that even remotely backs this claim (I've seen zero evidence of this, nor have I even remotely heard of this with Tesla anywhere before now), posts info not even related to Tesla cells, and a link to some document that doesn't even contain the word "Tesla", let alone relates to anything Tesla does, as "evidence".
One "word": lol.
I guess we'll just ignore everyone else that comes to or has already come to the same or similar conclusions as myself because of this one person. Makes sense to me.
Anyway, I sent off a couple of cells from storage to islandbayy today that I pulled from storage yesterday. While I was at it, I grabbed a random one and threw it on for some slow testing. It had self discharged a little, but nothing major. Did a full charge/discharge cycle on it, thermal controlled, and compared to the data I had for it before. Now, this cell has been sitting in my storage at ~17C for over 6 months. Prior to that it had been removed from a module from a D-pack that sat in storage for several months. Prior to that it was in a late VIN P85 that was in an accident after ~3k miles. It's well over a year old, for sure, probably closer to 2 years than 1 year. Since my last test of it 6 months ago it lost...... *drum roll*..... 11 mWh of capacity. That's
miliwatt hours. I mean, that's essentially zero. Most test equipment wouldn't even be able to measure that. The majority of that minuscule loss is just from the cycling I just did to it anyway. That's less than 0.1% capacity loss after 6 months, on a cell that's probably 18 months old and spent most of its life sitting. Oh, and the capacity of this cell measured at 11.33 Wh today. So again, calendar life degradation of these cells is virtually non-existent, for whatever reason, which is impressive.
But this again points out that these cells do NOT follow any of the datasheets available publicly. I think that is one of the most important things to realize here.