iPhone 6(S)/Plus More than iPhone battery replacement allowed per account?

[bhsu21]

Under my Apple account, I've already replaced the battery of an old iPhone 6 which I gave to my father in law. Now I want to replace the battery of my old 6S.

I've set up a Genius bar appointment for next week. Will Apple allow more than one battery replacement per account? It's a different phone of course.

 

[MacDawg]

I would think battery replacements are tied to the device, not to an Apple ID account