@BlueSwordM : ok seems like it may very well be the case, I’m taking this aspect of this thread on your “Liitokala Aliexpress Stores Battery Fraud: Massive fraud on 18650s in the Littokala Aliexpress stores! ” since it is off topic with the test methodology itself.
That being said, having bad (or simply good but not Real NCR18650Bs) cells doesn’t explain the disparity in test results. Maybe it is the PCB, or the tester that are bad. I have more lii-500 coming and one CC tester ( https://www.aliexpress.com/item/ATORCH-150W-Constant-Current-Electronic-Load-200V20A-Battery-Tester-Discharge-Capacity-Tester-meter-12V24V48V-Lead-acid/32821877897.html ) that should arrive soon so I will be able to do more tests.