Yes, turning off the Always On Display setting will help extend the life of your battery. But it actually may not be worth the effort to turn off the battery and to activate the display manually. It all depends on the series of Apple Watch. If you have the newest Apple Watch, Apple Watch series 8, then the Always On Display will not drain the
My series watch 7 does not stay "always on" , no one can help. I have the right settings, to display only on activated, the Theater mode is not on. I called t Apple tech support and they were not aware how to help. They just read me the same instructions I can read. Then they got a supervisor . I am very very frustrated. I really like the watch. mh1yB.