This is my first smartwatch, it has more than I expected to get in a smartwatch. The battery life is decent, 2 or 3 days but I do not use always on display, you will get less time with always on active.I use it with battery saver. The application on the phone works well.There is one negative thing, I cannot send files using bluetooth from my Z fold 5 to the watch, I don't see a way to send my music files to the watch, you need to synchronize your playlists but it is all weird, I use a third party app for music on the phone...This is something that should be simple but Samsung is making it complicated for no good reason.Update:The battery life is ok, I was afraid at first to use it without the battery saver mode but you can disable it and be fine. What I noticed is the Bluetooth was actually the thing that was draining the battery fast.Samsung sent an update that solved that problem. I wear it almost 24/7 so it can track my sleeping hours, all the features are enabled ecxept the always on display, I have a 35 minutes daily workout (2.6 km run and 1 km walk) and the battery lasts about 2 days.You could probably make it last 3 days with the battery saver but that disables some features that may or may not be important to you.