What's the Record for maintaining Battery SOH at 100%

I've avoided DC charging but made no special efforts beyond that.
Every Lithium battery degrades with usage, that’s why car manufacturers fit packs with (for example) 105% capacity but cap the usage to 100%. If you see a SoH of 99% it actually lost 6%.

It’s quite telling that only a few PFL SR models show ‘no degradation’ for years, therefore supporting the theory that they are indeed equipped with 120% batteries?

Imho both 100% and 88% SoH are outliers due to the particulars of the car and not related to ‘usage’.
 
Every Lithium battery degrades with usage, that’s why car manufacturers fit packs with (for example) 105% capacity but cap the usage to 100%. If you see a SoH of 99% it actually lost 6%.

It’s quite telling that only a few PFL SR models show ‘no degradation’ for years, therefore supporting the theory that they are indeed equipped with 120% batteries?

Imho both 100% and 88% SoH are outliers due to the particulars of the car and not related to ‘usage’.
Agreed. Think battery health is just luck of the draw.
 
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