Battery drain issue on iPhone 17 Pro after iOS 26.0.1 update

After updating to iOS 26.0.1, my iPhone 17 Pro's battery started draining for several hours. How do I fix this?


[Re-Titled by Moderator]

Original Title: After updating to iOS 26.0.1, my iPhone 17 Pro

iPhone 17 Pro

Posted on Oct 6, 2025 3:39 AM

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Posted on Oct 6, 2025 6:37 AM

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.


20 replies

Oct 15, 2025 12:08 PM in response to toofastouch

toofastouch wrote:

On day one of owning my 17 pro plus and it seems to last no longer than my 13 pro plus I got rid of when I was told there would be a massive difference in the Battery life. How can this be?

On day one of owning a new iPhone and for a few days later, it is working behind the scenes to index millions upon millions of bytes of data. This process isn't instant and can take several days depending on how much data you transferred over from the previous phone. It usually settles down after a few days, so give your phone the chance to finish the full indexing process.


When I got my 17 Pro Max, it drained the battery faster than my 16 Pro Max. Now now a few weeks later, the battery is nothing short of AMAZING. While I haven't done that much on my iPhone, since taking it off its charger at 8 AM, the battery is still on 100%, 7 hours later. Again, I haven't needed to use my phone much, but the battery in my 17 Pro Max last all day and then some. I do charge my phone when I go to bed at night and leave on its charger ALL night, EVERY night with Optimized Battery Charging turned on and the phone is connected to Wifi, so it will backup every night.



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Battery drain issue on iPhone 17 Pro after iOS 26.0.1 update

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