iPhone 13 battery drain and warmth after iOS 26 update

okay so I updated to iOS 26 about a week ago and my battery life has been absolutely terrible ever since. like genuinely shocking how fast it drains now

before the update I could easily get through a full day on a single charge, sometimes even had 30-40% left at night. now I'm at 20% by like 2-3pm and I'm not even doing anything heavy, just texting, scrolling, maybe some YouTube

my details:

• Device: iPhone 13
• iOS version: 26.0
• Battery health: 89%
• Storage: about 18GB free

things I already tried:

• restarted the phone multiple times
• turned off background app refresh
• lowered screen brightness
• checked which apps are using battery in settings — nothing looks unusual
• turned off location for most apps

nothing helped. battery still drains like crazy. phone also gets a little warm sometimes which it never used to do before

is anyone else experiencing this after the update? and has anything actually worked for you? really don't want to go to the Apple Store if I can avoid it 😅