Originally posted by Smeggypants
But if you're happier buying 3rd party batteries with a Pentax stick on then who am I to worry.
You shouldn't worry, as it has nothing to do with you.
However....
As soon as the company slaps their name onto an accessory product, they are guaranteeing that it is fit for use with the products it is intended to be used with.
They are guaranteeing that it has been built to their specification, no matter who the actual manufacturer was, be it them or a jobber that was a given a set of specifications to meet.
And if it fails to meet those specifications, it is on that company to make it right.
The same CANNOT be said for a product that has a third party label on it.
All that can be said is that it's form factor is such that it will fit onto (or into) the product it is intended for, not that it meets the operational criteria required.
It may meet the specifications required, but it just as easily might not, and if it doesn't, who is going to pick up the tab?
Oh yes, that would be the user, since it's highly doubtful that the other parties will do anything other than point their corporate fingers at each other, blaming each other for the failure.
If a person wants the peace of mind that buying OEM brings, what's the problem? It's not like we are talking about a lot of money here.