Apps, except watch faces and complications, a.k.a. information and notifications on the watch face, will no longer
run in the background unless the watch is charging.
Wi - Fi will automatically turn off when your watch is connected to your phone via Bluetooth and apps will no longer be able to
run in the background unless your watch is charging.
When Battery Saver mode is activated, no apps will
run in the background unless you specifically allow them to.
Google says «apps will no longer be allowed to
run in the background unless the watch is on the charger,» while encouraging developers to «remove background services» from their apps.
Not exact matches
However,
unless you've actually installed «Chrome apps» that
run in the
background and need them
running 24/7, you may want to disable this feature.
The apps you drag there remain
running in the
background, but you won't see their notifications on your taskbar
unless you click the up arrow.
Next, Android P for Wear OS limits
background activity to an enormous degree by shutting down all apps
running in the
background,
unless your watch is on a charger.
Apps won't be allowed to
run in the
background while Battery Saver mode is enabled
unless manually add them to the «Always allowed» list here.