Well, honestly just asking for the OSs' up time is too vague. There are many variables that play in battery life, like (obviously) screen brightness, network connectivity, what apps you have installed, notification settings, if you use a live or static wallpaper, and many many more. I have Nougat on my LG V20, and I use my phone all day for things like music, maps, photoshop. So far, my phone lasts me all day and I usually dwindle the battery down to an average of 7-12% before I go to bed.