I hear a lot about battery problems, but (fortunately) I don’t think I experienced those.
I use AOD, notifications on, HR on, Simplicity analogue watch face, DnD at night, no sleep tracking. The watch lasts for about a week. E.g. last week I charged on Sunday, did one 6 h Alpine skiing, 2 2h alpine skiing, 1 2h XC skiing (with HR belt) , 5 indoor exercises (HR, but no GPS). On Friday night, the battery level was 30%.
I am not sure what should be my expectations for the battery life, but 6 days with a number of activities using GPS is not that bad.
I am on the most current f/w level (2.48.16)