I just pop the back off, battery falls out, put in a new one, snap the back back on.

Wow, if I ever saw a phone that doesn't use glue on the back of the battery, it would be the first time for me personally. It seems like I've been inside quite a few phones since 2012 or so when I got my first $13 Android phone (new). But that's just how it feels to me personally. As I've said before, sample size is important. And talking about my experience with smartphone batteries, we're talking n=10. (that is, the sample size is 10)