What settings do you use outside of cell service? Turning phone and watch to flight mode would prevent battery drain associated with constantly checking for cellular signals. However, in flight mode, I would loose the automated waypoints introduced with watchOS 10 (last cell service, last emergency call option). And I would also loose satellite SOS in case of an accident.
What's your best guess to avoid draining battery and still use all safety functions?
the following might be useful info for you.
its important to distinguish between 4 different features (that may be available in your area.
1
Fall Detection.
can be set to be done automatically.
but, does require a cellular phone connection (or be close to the iPhone and have WiFi calling turned on)
2
Crash Protection
can be set to be done automatically.
but, does require a cellular phone connection (or be close to the iPhone and have WiFi calling turned on)
3 Emergency
Call
can
not be set to be done automatically. you need to make the call (there are different ways to make this call)
is a few countries (only USA, Canada, and USA) cellular connection is
not needed to be make calls to designated emergency places. other than those 3 countries , to make an emergency call does require a cellular phone connection.
4 Emergency
SOS
can
not be set to be done automatically.
you do it
manually.
does not need a cellular connection at all.
limited to only a few countries right now.
i know it can be confusing.
but its easy to learn about all this many different languages.
here is the link:
Choose your country or region - Apple Support
support.apple.com