Battery performance since upgrading to 13.3.1

What’s your battery capacity percentage?

Anything below 80-85% means even charging your battery to 100% will only really get you 80-85% charge/capacity/performance.

i had to the same issue, so I replaced the battery and I’m more vigilant in making sure I close out apps and put phone in airplane mode when I need to charge it without interruptions and with nothing running in the background while charging.

Put it on a charger while you sleep.

Battery capacity is at 99%. It’s definitely update related

Wow 99% is sweet.

sounds like Apple will have to do another update to fix this update.

until then try using a powerbank or charging case.

I'm also having battery drain issues on my Iphone 8 after upgrading to 13.3.1. I don't have issues with my 8 plus after upgrading. I reset both but battery drain persists on Iphone 8. I hope Apple is aware of the issue

I also have 8 plus with no issues