So the next question is.. Is the battery easily changeable? Or indeed changeable at all?

I'm not seeing any screws on the back of the thing.
And I am one of those people who uses it many many many times a day.
Two accounts linked to it for starters. So I'm already pressing it twice as often as most people.
And I log in/out/in usually 3-4 times a day at least..

I got a spare token when I purchased the limited edition of FFXIV though.
So another question - would it be possible to switch over to that one when this first one finally buys the farm?