Gearbest: Samsung Wrapper -- what's inside? Opinions and descriptions vary (seems likely all OK)

[Blinky1]

@cabfrank

Here is a real problem though; how can we really know? I mean, if we don’t have a way to test the cells, when will we find out? When something bad happens?

You can check the 25r’s by looking at the markings in the metal cylinder: Test/Review of Samsung INR18650-25R 2500mAh (Green)
It might also work for the other Samsung’s too, if they have not changed the way of marking them.