Hi, I am sorry to hear your watch is not having as much battery life. There are several reasons why your Galaxy Watch may be experiencing battery drain or have decreased battery life. For example, certain apps can increase battery consumption. Keep reading to learn more about how to increase your watch's battery life. Try these steps to maximize your battery life: https://www.samsung.com/us/support/troubleshooting/TSG01003232/
Please inform me if this helps.