My iPhone 17's battery drains like crazy

My iPhone 17's battery drain is way too high. I've had the device for over a week now. Have all battery draining settings tuned down (using phone in dark mode, white point reduced, auto brightness, background app refresh restricted, mails set to fetch instead of push, adaptive battery on, etc.).

This is my first iPhone. I have a screen-on time of barely 2 hours every day, and my battery drops by 50-60% during this duration. Battery usage by app isn't much either (max 5-6% by Instagram). The battery drain is shocking, to say the least.

What should I do? Should I contact Apple for a replacement or will it get better?

Posted on Sep 30, 2026 11:05 PM

1 reply

Smilin-Brian

Level 10 (97,882 points)

Oct 1, 2026 1:42 AM in response to frub_

Welcome and thank you for reaching out. 🤗

A rapid battery drain after updating to iOS 27 can happen while the system reindexes and optimizes in the background, usually taking a day or two.

According to Apple: If you notice that your battery life has decreased after updating your device, wait a few days and then check again. Even though you can use your device immediately after an update, certain tasks related to the update continue in the background and might affect battery life and thermal performance. While they're ongoing, you might see the Insight Ongoing iOS Update in Settings ➢ Battery.

If you need more help, contact Apple Support directly.

Take care!

Smiliñ 😎 Brian | Community Volunteer