Like most uninformed people I jumped the gun and criticised the feature as useless, however just been to the Gym, used low power mode, listened to music and used the work out, app, at the end of an 80 min work out, the watch used only 10% of the battery, it's usually at least 25%, the only compromise was the lack of cellular (which I can live with) but I got my iMessages. Brilliant 😊So lower power mode (aw) = casio watch 😂
Not complaining, saying that is useful during international travels