Again, I have to say that these are legit Samsung 30Qs, and that they all check out as real 30Qs. Physical tests: They have a positive pole with 3 legs, and weight 45,9g, which is accurate compared to Samsung's datasheet and other 30Qs that I have, so it's good. Capacity: Down to 2,6V at 3A, these 30Qs get 2963mAh, which is an accurate measurement compared to real Samsung 30Qs. Internal resistance: The Samsung 30Qs that I have here have a measured internal resistance of 21-22mOhms, which is extremely good for Samsung 30Qs, and is accurate compared to real Samsung 30Qs, allowing it to output 15-20A. All in all, I can confirm that these are legitimate Samsung 30Qs, and the best source of these 18650s for people living in Canada, like me, where it's hard to get decent 18650s for good prices.