Hi, Tembisa, please follow the steps below to help save battery power on the Galaxy watch.
1. Turn off unused health-related features on your watch.
Press the Power key on your watch, and then tap Samsung Health from the Apps screen. Swipe to and tap the health menu for the function to turn it off. When accessing a health menu, press the Back key on the watch twice to return to the main menu in the Samsung Health app.
Sleep: Tap Settings at the bottom of the menu, turn the switch off, and then tap OK to confirm.
Heart rate: Tap Auto HR Settings from the bottom of the menu, and then tap Never.
Stress: Tap Auto stress settings from the bottom of the menu, and then turn the switch off.
2. Turn off Watch always on.
Press the Home key (Power key) on your watch, and then tap Settings from the Apps screen. Depending on your watch, you may need to tap Display. Tap Watch faces, then tap Watch always on, and then tap the switch to turn off the feature.
3. Turn on power-saving mode.
When power saving mode is turned on, your watch's Home screen will be displayed in grayscale and all functions will be turned off, except calls, messages, and notifications that use Bluetooth. Wi-Fi and mobile data will also be turned off, and performance will be limited.
Press the Home key (Power key) on your watch, and then tap Settings from the Apps screen. Depending on your watch, you may need to tap Battery or Battery management. Then, tap Power saving, and then tap the checkmark to turn on power-saving mode. To turn off Power saving mode, tap OFF from your watch's Home screen, and then tap the checkmark.
4. Do not expose your watch to very cold or very hot temperatures.
Exposing your watch to very cold or very hot temperatures can shorten the watch's battery life and could lead to damage.
Should the steps below not help with the issue you may need to get it assessed at an Authorized Samsung service centre. Please go to the below link to locate the closest Authorized Service Centre to you.