I guess there are also multiple states of removable. 2012 macbooks had the battery in multiple packs in odd spaces like the new ones but they had a screw in bra

I guess there are also multiple states of removable. 2012 macbooks had the battery in multiple packs in odd spaces like the new ones but they had a screw in bracket holding them in place which made it trivial to remove and put a new one in. The new ones have it glued down so heavily that the battery replacement process is "Take the screen off, put it on a new bottom case, throw out the old bottom half"