> physically proximal to the device and have a fresh battery available

I think it's also worth saying, these batteries aren't the standard AA batteries most people on hand, they're 2032 (I believe? or 2025) "quarter batteries" which isn't something a lot of people just keep around. So in addition to being physically proximal, once they've figured out how to open it up and being surprised by the "weird battery," they've also got to remember which it was when presented with a wall of similar looking "quarter batteries" at the store (see: my lack of assurity even having previously replaced these).