Manage your battery life

Each Wear OS watch has battery-saving modes and features. The Mobvoi TicWatch Pro 3 Ultra GPS, for example, has a low-power LCD display over its primary screen that displays the time while consuming next to no battery. Fossil watches have branded Smart Battery power profiles, while the Galaxy Watch 4 and 5 series' power saving mode restricts features with one toggle.
Along with familiarizing yourself with your watch's battery-saving modes, there are a handful of things you can do on any Wear OS watch to extend its battery life:
Turn off the always-on display
Keeping those pixels lit up consumes the battery.
- On the Galaxy Watch 4/5, go to Settings > Display and turn off Always On Display off.
- On other Wear OS devices, go to Settings > Display and turn off Always-on screen.
Disable raise to wake
The feature can cause your watch's screen to light up when you're not looking at it, which uses power.
- On the Galaxy Watch 4/5, go to Settings > Display and turn off Raise wrist to wake.
- On other Wear OS devices, go to Settings > Gestures and turn off Tilt-to-wake.
Turn off unnecessary notifications
Notifications you don't want to be delivered on your watch are distracting and waste battery.
- On the Galaxy Watch 4/5, most apps can't send notifications by default. However, you can allow or disallow notifications on a per-app basis in the Galaxy Wearable app on your phone. Go to Watch settings > Notifications to see a list of your apps and whether they can send notifications to your watch. Only turn on the ones you want.
- To change notifications on the Pixel Watch, open the Pixel Watch app on your phone and tap Notifications.
- If your watch uses the Fossil app, navigate to My Preferences > Notifications.
- For Wear OS devices not yet on Wear OS 3, use the Wear OS app. You can toggle which apps notify on your watch in the Wear OS app on your phone. Under Settings, tap Notifications > Change watch notifications and turn off notifications for apps you don't need buzzing your wrist.
https://www.androidpolice.com/