How To Preserve Battery On Apple Watch Series 5. The brightness of the screen is inversely proportionate to the battery life. Performing this step was initially suggested by the Apple representative before she blamed the watchOS beta for the battery issue.

To update your Watch launch the Watch app on your iPhone and then tap General Software Update. So be choosy about what you actually need to be notified of. To enable this mode find the Workout section in the Watchs Settings app and toggle Power Saving Mode to on.
Turn off always-on display mode.
Turn down the color. It indicates a way to close an interaction or dismiss a notification. To enable this mode find the Workout section in the Watchs Settings app and toggle Power Saving Mode to on. Turn Off Always-on Display Feature on Apple Watch Series 5.

