I've said this to you before, and I feel pretty certain of this: There is no "Real Grade A" or "Grade B". The manufacturers don't use that term, and neither do their "real" customers. ALL the cells we have available to us are those that the EV/Automotive customers (that probably buy 98% of the cells) have not bought. So for one reason or another, we get cells that they don't want. There is no distinct gradation between some really good reject cells, and some really bad reject cells. They are all reject cells. You may be able to say that "18650store has access to better reject cells than store XYZ". I don't really know how you would know, but I guess you could say that.
I agree that Docan re-lasering cells is a bad look. I also think that they may sell cells of other sizes that are not re-lasered. I dunno.
Fact is, I don't know - and you don't know - the real pedigree of whatever 18650store, sun fun kits, or Docan are selling. Fact is, I'd be willing to bet they all get a mix of pedigree. I think it is highly disingenuous and with absolutely no factual backup that we assign "Genuine A grade" to any of them. Period.
And finally, I think the bottom line is this: Short of the cells being dented, shorted, leaking, or terminals falling off, I think almost all of them would do perfectly fine in the application most of us are aiming for: Relatively low C rate solar power storage. This seems to be a game we like to play. We strive for that last 2% of capacity that the cells were rated, but in fact... It really is 2%.
