iPhone battery draining after iOS 18 Update Apple IOS : Update finishing in background. Instructions for iPhone 16 and saving battery drain.

To assist in helping iPhone 16 with battery drain during and immediately after IOS 18 U-dates. Or any future large IOS release.  This recommendation are only for individuals that are experiencing significant battery drain after Apple IOS updates .

These changes will greatly increase the time it will take to complete this task. And might save   battery draining that some are experiencing.

You might receive a message/notice  in your Battery settings. That it might take a few days for the new IOS  update to be assimilated .

These changes will greatly increase the time it will take to complete this task. 

And the  instructions below might save , a possible  battery drain. 

Here’s a more concise guide to help reduce battery drain and speed up optimization after downloading large iOS updates:

Please do this in the evening when iPhone is not needed for an extended time period.

Here’s a hopefully a concise guide to help reduce battery drain and speed up optimization after downloading large iOS updates:

Temporary Settings to Reduce Battery Drain 

After downloading a major iOS update, your iPhone may take a few days to complete background processes, which can drain your battery. Use these temporary settings to help speed up the process and reduce battery drain:

1. Turn Off Auto-Brightness

Settings → Accessibility → Display & Text Size → Toggle off “Auto-Brightness” (bottom of the screen)

2. Disable All Notifications

Settings → Focus → Do Not Disturb → Turn on “Intelligent Breakthrough and Silencing”

3. Set Battery Charge Limit to 100%

Settings → Battery → Battery Health & Charging → Turn off “Optimized Battery Charging” and “Clean Energy Charging”

4. Disable Auto-Lock

Settings → Display & Brightness → Auto-Lock → Set to “Never”

5.— Control Location Services: Only allow location access for apps that truly need it. 

Additional Tips:

• Plug in your iPhone and keep it powered on during the process.

• Use Wi-Fi only, and avoid using cellular service while the update optimizes.

• Do not power off your phone until the background processing is complete Or you need to use your phone.

When to Restore Settings:   Once the Battery settings no longer show a message about completing the update, reverse all the above settings to preserve battery health and normal functionality.