iOS 16.2 Battery extreme drain iPhone 11

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Level 1

28 points

iOS 16.2 Battery extreme drain iPhone 11

I installed iOS 16.2 yesterday morning on my iPhone 11. By noon, its charge had crashed to 22%. Recharged. Major drain again, few apps in background. Checked Battery health: 88% max charge. This morning it was 100% charged after overnight charge. Checked it hourly and it dropped 14% per hour. No calls, no internet searches, screen off mostly. Battery app says Screen on 2h35m off 24m. Strange because the screen was off for over two hours while I worked on a project.

I am considering re-installing iOS15.x because it did not drain like this. I relay on iPhone but do not trust it to last all day as before. Not sure what to do. Apple Support said to wait 48 hours as some apps may need to 'adjust' somehow.

Posted on Dec 16, 2022 10:10 AM

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Answer 1

Bob Timmons

Level 10

188,806 points

Dec 16, 2022 10:20 AM in response to chbrewer7

I am considering re-installing iOS15.x because it did not drain like this.

Nothing really to consider here, since Apple does not support downgrading iOS.

Apple Support said to wait 48 hours

Good advice. Everything on the iPhone needs to be re-indexed by the operating system and that means a lot of things running in the background for a few days after the update is complete. The battery is working hard overtime until this task is completed. Things should return to normal after 2-3 days or so.

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Answer 2

LD150

Level 10

104,048 points

Dec 16, 2022 10:18 AM in response to chbrewer7

It will take three days to re-index if you have a busy iphone.

Remove any Security or VPN apps and ensure all other apps are up to date.

Check the battery usage chart for obvious battery burner apps

See this this user tip contains a number of ideas

The last update killed my battery! - Apple Community

If you want to check the battery for internal leakage here is a test.

Check your iPhone battery for Self-Discha… - Apple Community

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Answer 3

chbrewer7 Author

Level 1

28 points

Dec 16, 2022 11:48 AM in response to Bob Timmons

Thanks! I wish I had known this or that the Apple Support person (chat) had explained the process. I think Apple should disclose the process to users in order that they be aware of the short term impact.

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Answer 4

chbrewer7 Author

Level 1

28 points

Dec 16, 2022 11:46 AM in response to LD150

These are great links. Thanks. I wish I had known the extent of the re-indexing required for this update. Apple should advise users about the process that takes place after a major iOS update.

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iOS 16.2 Battery extreme drain iPhone 11

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