How much battery life does No Cellular Coverage consume for your iPhone?

[ddmiller (Doug Miller)]

@chengengaun

So far, the only downside to this setup is that the Apple Watch will also switch to Airplane Mode and no longer able to unlock the Mac.

FWIW, you can turn off “mirror iPhone” in watch app / General / Airplane Mode. This means when you really want airplane mode on the watch you’ll need to turn it off manually, but that’s never a problem for me.