Believe me a lot are, I'm not saying that they all are but probably the majority are. So just don't dismiss them as substandard.
Explain to me please why I should take your word for this?
Have you been to the factory in question? Did you take photos showing Nikon or Canon batteries on the same physical production line as other-branded batteries?
Sorry but I'll take heed of the manufacturer's advice (
especially if there's even the
remotest possibility of any resultant damage costing me money) over an internet pundit any day.
It's been proven that they
are substandard. Issues have arisen - not many, but some.
Even if they are made in the same location, assuming what you say is true, there's still no guarantee that apart from the plastic casing the components used are of the same quality.
From the little that I do know about Chinese manufacturing practices, it's likely that a number of factory complexes in the same town or city all make the same or similar products - this is a typically communist approach to manufacturing. All the required raw materials and components can be shipped by rail to one location (bearing in mind the size of China, this makes even more logistical sense) and the finished products are shipped out by rail to the nearest shipping port. The workforce are housed in dormitory accommodation provided by the state and work there for life or as near as dammit makes no difference.
How else do you think they remain competitive on the world market. Centralised production, relatively poor wages and a virtual slave workforce (by our standards, that is - they're probably quite cheerful about having a guaranteed job), that's how.
It's quite possible that several of the factory complexes also make 'knock-off' items to a similar standard, but in all liklihood it will be using componentry that fell just short of the required Japanese-mandated QC checks for OEM-branded products...
Look at the market for cheap Chinese wireless triggers: bet
they're all produced at the same location as well: you going to tell me that
they're all the same quality just because they're all made in the same town?