This does not really cover "repair" at all, but replacing the battery costs ~10€ at my local jeweller, including the battery itself. I can go there, hand over t

This does not really cover "repair" at all, but replacing the battery costs ~10€ at my local jeweller, including the battery itself. I can go there, hand over the watch, go to another shop for groceries or something and return after 10 minutes and they're done. If Apples products are designed that way, there is no reason why it could not be the same (at least for batteries). Watches have usually the same constraints: Water tight, less/no screws, small, intricate. Of course, lithium batteries are more expensive, but that's it.