Battery drain issue on iPhone 17 Pro after iOS 26.0.1 update

Is it connected to a charger at night, turned on and connected to WiFi? Are you in the habit of swiping up on apps in the app switcher and closing them?

I understand that you’re frustrated by the battery draining. The root cause is going to be associated with the apps. Try deleting the app, not its data, and download a fresh copy and see if that improves the battery consumption. There is no quick fix for this. I saw the same issues with iPhone 15, 16 and 17. For most people the cause as apps that the developers had not optimized. Many had memory leaks, used excessive CPU, constantly updating in background etc. Some developers responded quicker than others.

Here’s my usage for today so far. So far 2 ½ hours screen active and 3 ½ hours screen idle. Used just 13% battery capacity. Notice no Telegram, no TikTok, no YouTube, no Facebook, no Instagram etc. If I started using YouTube or Facebook, my battery usage would go way up. What does that tell us? Those apps aren’t optimized for the new iOS. Apple apps that I’m using currently are optimized.

Please do a forced restart and monitor your iPhone battery for next 24 to 48 hours for improvement.

Force restart iPhone - Apple Support

Have you looked in Settings > Battery > View All Battery Usage > what apps are causing excessive battery consumption?

I agree it’s not normal. Let’s look at the app that’s using you most battery capacity, YouTube. Here’s their update history from the Apple App Store. It’s been updated 7 times in 14 days. That’s not normal. In the last 7 days it been updated 5 times. That’s not normal either. In fact, YouTube just updated their app an hour ago.

Battery consumption is related to the apps you use. If the apps aren’t optimized and they’re full of bugs, they’ll be inefficient and consume way more of the battery than a properly optimized app. Read what every update contains, bug fixes. Why is that?

Snoopy72 wrote:

Hi! I just wanted to confirm that I’m experiencing exactly the same issue on my iPhone 17 Pro Max (iOS 26.0.1).

My phone is brand new, 100 % battery health, recently returned from Apple Service (no hardware issues found).

Despite a clean setup and no background apps, I’m losing around 50–55 % in about 12 hours of light use (mostly Messenger, web browsing and short calls). Overnight it also drops several percent while idle.

You should be charging your phone all night every night and I recommend using the Optimized Charge setting. If you are using a charge limit, you are already starting each day with a partially depleted battery. Your phone under any iOS version is going to drop several percent overnight while idle. What you described is having all day battery life. Don't get caught up comparing Screen on/off time as you can see adding the 2 together never equals 24 hours which are the only 2 states other than when your device is powered off.

All the background activity means those apps are still indexing and updating files and backing up.

Do you charge your iPhone overnight and leave it turned on and connected to WiFi?

When did you do the restart ?

Correct, the apps at the top of the list are consuming the same capacity in a shorter period of time. What apps are they?