Lower Your Display Brightness
The display is one of the biggest reasons why you may be losing battery life. The bigger the display and the more often it’s on, the more energy it consumes. Moreover, if your display is too bright, your Apple Watch will lose battery more quickly.
Here’s how to reduce the brightness on your Apple Watch:
- Open the Watch app on your iPhone.
- Tap on Display & Brightness.
- Drag the slider under Brightness down.
On your Apple Watch, you can also directly adjust the brightness by going to Settings > Display & Brightness and adjusting the brightness however you want.