I don’t know. I received a pile of them from several awesome vapers willing to send them to me. They’ve been using these batteries for up to months and purchased them from several vendors.
These fakes are often created in one quick batch and dumped on the market. The counterfeiters then disappear before anyone finds out that the batteries are fake.
Identifying the vendors, even if I knew who they were, would be problematic because some will not have the fakes in stock anymore. Any vendors who do will hopefully remove them.
Just as additional info…
I purchased a pair of Samsung 25R’s from three vendors recently for my performance testing of the 25R (checking if there has been a performance drop over time…there hasn’t). All six batteries were genuine and performed as well or better than previous 25R’s I have tested.
These vendors were Illumn, IMRBatteries, and Liion Wholesale (in alphabetical order).
There are a large number of other vendors who stock genuine 25R’s though! Check my pinned post for a list of my trusted vendors or speak to your vendor of choice about this issue if you have any concerns.