An observation:
No mass produced product is perfectly made, nor 100% tested.
Random failures are to be expected, particularly when new (bathtub curve). That’s what warranties are for.
Batch related problems would be a quality control issue.
That’s reality.
Upon discovering a fault in one’s device, the reasonable approach is to ask the supplier to replace it with a good one.
If so done, in a timely manner, be happy.
Even share your good experience of customer service with others.
The illogical approach is to shout “fake”, “counterfeit” etc.
Particularly if the supposed manufacturer seems uninterested in examining the “counterfeit”, and absolutely confirming the “deception”
Without such a statement from them, it is illogical to pursue the matter further.
Such accusations may spread uncertainty and doubt in the minds of others, perhaps leading them to question whether they too may have been deceived.
I don’t think that is necessarily helpful.
I note that HKJ provides authoratitive tests of numerous such products on his website, sometimes with detailed photographs of the internal circuit boards, at the request of the manufacturer.
I find this to be a valuable source of information.
Edit:
And identifies weaknesses, which are sometimes then corrected by the manufacturer, in the spirit of “continuous product improvement”.
PS. Title now Millerised 
PPS: more subtle ?
PPS: try 3
