I've been noticing that my iPhone 7 has been overheating, and the battery has been draining a lot more quickly since going to iOS11. Anyone else having this issue?
iPhone 7+ Overheating & Battery Drain
This happens with every single major beta release. It's normal. Battery life usually doesn't return to normal until beta 3 or 4.
Turning on low power mode will avoid overheating and slightly improve autonomy until any next beta fix this.
I ran the battery down below 5% till it shut down,then did full recharge.
Seems to have made the draining issue go away. ( for now )