Battery life on my iPhone XR running iOS 13.1.2. is sublime.
Yesterday at 6:30 AM I unplugged it at 100%. Spent the morning browsing the web, some messaging, but nothing major. I spent the rest of the day using the phone lightly (some twitter and browsing, some viber messaging). On my way home from work I spent about an hour and a half on voice calls, using Airpods. When I was done and arrived back home at 6:30 PM, my battery was at 73%.
It’s now 2 PM here, again I’ve been using the phone throughout the day (messages, reading documents in word) and the battery at 48%.
This now seems to be a three day phone. I also have LTE on as well as automatic brightness. The OS has some bugs, but I’m very happy with battery life.