I always buy from this AliExpress store and never had a fake yet. https://www.aliexpress.com/store/product/Free-shipping-4PCS-LOT-3-6V-INR18650-30Q-18650-3000mAh-Continuous15A-Li-ion-battery-for-Samsung/1191644_32764366962.html?spm=2114.12010612.8148356.6.6b629682FwkFjE

This is my test of the 30Q’s purchased there using the West Mountain Radio CBA IV. Same tester as Mooch. EDIT: Same as Mooch but not tuned to be quite as accurate.

My 10A test has voltage drop near the start as contacts needed cleaning on my battery clamp

This same cell measured 2830mAh at 500mA discharge using the LiitoKala Lii-500. Learnt that the Lii-500 isn’t accurate at all, just a rough estimate.