Using my watch like an iPod and battery

Hello. I have an apple watch sport. It works really great and I have paired it with a bluetooth headset. I would need some advice to how to save battery when I do because I am not sure.
I have syncronized the apple watch with all mhy music. I am allways listening to Enya. I have 52 songs by her that I have bought on iTunes with my iPhone. But I would need some advice to how to save battery when I am using it as an iPod. Because the mode to save battery life turns off VoiceOver so this doesn’t work.
I assume that removing pulse from the watch face can actually work. I got rid of Calmface wich is a really good app but takes too much battery.
Do you all have more advice?