Lost 5% just for browsing and not even watching any video within 5 minutes on iPhone 13 Pro running iOS 17.5.1 and this is after 4 days since iOS 17.5.1 was installed, updated from iOS 17.0.3 [I bought a pre-owned iPhone 13 Pro but I updated it to iOS 17.5.1]No changes to my 15 Pro Max after updating to 17.6 b1. Performance and battery life about the same as 17.5.1.
I previously owned an iPhone 14 Pro Max running iOS 16.7 so I'm fairly new to iOS 17 as well as the iPhone 13 Pro battery experience...
Based on what you said, it seems to me that it will not matter whether I stay on iOS 17.5.1 or update to iOS 17.6 DB/PB 1, battery life will be the same... I hope not...