iPhone feels warm after iOS 18.6.2 update

I recently (about 3 days ago) updated my iPhone 13 Pro to iOS 18.6.2 and my phone feels warm to the touch, which did not feel this way prior to iOS update.

I powered off my phone last night around 10:30 pm and powered on my phone this morning around 8:30 am. After about 10 minutes, my phone still feels warm.

I removed my phone case because case felt warm and even without phone case, my phone still feels warm.

Has anyone experienced this issue since updating phone to iOS 18.6.2?

Thanks!


[Re-Titled by Moderator]

Original Title: iPhone feels warm after 18.6.2 update

iPhone 13 Pro, iOS 18

Posted on Aug 25, 2025 10:42 AM

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Question marked as Top-ranking reply

Posted on Aug 29, 2025 07:15 PM

AlanK1977 wrote:

Oh wow!
My Battery Health is at 78%, but I’m not sure if that’s before or after the iOS update. Nevertheless, I read a message that I need to replace my battery.

iOS updates have NOTHING to do with Battery Health. Battery Health is a measurement of the maximum capacity of the battery. With every full cycle charge, the health of the battery diminishes. Batteries are consumable parts and they simply cannot last forever. And yes, at 78% your battery has degraded to the point it needs to be replaced.

13 replies
Question marked as Top-ranking reply

Aug 29, 2025 07:15 PM in response to AlanK1977

AlanK1977 wrote:

Oh wow!
My Battery Health is at 78%, but I’m not sure if that’s before or after the iOS update. Nevertheless, I read a message that I need to replace my battery.

iOS updates have NOTHING to do with Battery Health. Battery Health is a measurement of the maximum capacity of the battery. With every full cycle charge, the health of the battery diminishes. Batteries are consumable parts and they simply cannot last forever. And yes, at 78% your battery has degraded to the point it needs to be replaced.

Aug 25, 2025 11:09 AM in response to AlanK1977

It's not unusual after an update and even a few days after, depending on how much data is on the phone, for the phone to feel warm. Phones need to index the millions of bytes of data after an update. It would be good for you to do what WheelieNick suggested, which is to Force Restart your iPhone (I do this after EVERY iOS update, EVERY TIME).


Another thing to consider is what your Battery Health is at this point. Depending on when you bought your phone (they were released originally 4 years ago, in 2021). If you bought your iPhone when they were originally released, it's highly probable that if you still have the original battery in your phone, it's time to replace the battery. Open Settings > Battery > Battery Health. If it is 80% or less, the useful life of the battery has been used and it's time for a new battery, which you have installed at your closest Apple Store Genius Bar.

Aug 28, 2025 08:55 PM in response to Nancycy143

Nancycy143 wrote:

Nothing happens when I follow these instructions. Pressing and holding the side button brings up Siri and no Apple logo appears.

Then you didn't quite follow the directions exactly as written.


  • You have to quickly press and release the volume up button
  • Then immediately quickly press and release the volume down button
  • Then immediately press and hold ONLY the side power button and KEEP HOLDING it until the screen goes dark and KEPP HOLDING it until the Apple Logo appears, then LET GO.

Aug 29, 2025 06:00 PM in response to AlanK1977

Also IPhone 13 here. This update actually killed my phone. It’s started warming up (for several days). Then the battery expanded. Battery health fell to 63%. I took it to the Apple store, they offered a new device for free (though my warranty expired years ago). I couldn’t wait for 3-14 days, so they replaced the battery for free. But iPhone still heats up (I can’t tell what exactly causes that). It definitely has to do with 18.6.2. Until this update phone worked just fine and I never had to check for battery health. Very disappointing.

Sep 1, 2025 12:02 PM in response to AlanK1977

The same thing is happening with both my iPhone and iPad since I updated to 18.6.2. I never had a problem with either device charging, but since the update both devices get super hot when charging/ plugged in, and my iPad requires constant restarting to charge the battery. The batteries are also draining really fast when using. My iPhone battery usually lasts all day, but now drains after a couple of hours. I actually brought my iPad in for service last week thinking my battery was the issue, but the tech said my battery is fine with Battery Health above 90%. I bought an external cooling device for my iPad, which helps a little and the battery lasts longer when unplugged but I have to remove the case to use it. The heating issue definitely started when I updated to iOS 18.6.2.

iPhone feels warm after iOS 18.6.2 update

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