tieke:
Probably a slight variation in the barrel sizes - I could see the tech having their power supply fitting and then not checking the rest. Re the Zoom thing, it looks like you also have to enable preview firmware updates, which I have now done.
I mean - maybe. It's not even close though the plastic barrell really doesn't fit. I'm inclined to thing ' voltage and current it ok, lets go', and the package what ever has been shipped.
Some fit from supplier a, some don't from supplier b, and some are marginal from supplier c.