Battery draining with iOS 17.0.3

How old is your iPhone? Depending on the use of your device, the battery health can be reduced by 1-2% per month.

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The Battery Health screen includes information on maximum battery capacity and peak performance capability. 

Maximum battery capacity measures the device battery capacity relative to when it was new. A battery will have lower capacity as the battery chemically ages which may result in fewer hours of usage between charges. Depending upon the length of time between when the iPhone was made and when it is activated, your battery capacity may show as slightly less than 100%

A normal battery is designed to retain up to 80% of its original capacity at 500 complete charge cycles when operating under normal conditions. The one-year warranty includes service coverage for a defective battery. If it is out of warranty, Apple offers battery service for a charge. Learn more about charge cycles.

As your battery health degrades, so can its ability to deliver peak performance. The Battery Health screen includes a section for Peak Performance Capability where the following messages may appear.

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copied from: iPhone Battery and Performance - Apple Support

If you think, that the latest iOS update damaged your battery, contact the official Apple Support and let them diagnose your device online.

You can give them a call by choosing the phone number for your region from this Apple page:

Contact Apple for support and service - Apple Support

My iPhone 12mini is two years old, and I have 86% battery health left.

To make sure, Apple knows about this potential iOS issue, you will have to use the Feedback link.

Apple does not follow these user to user discussions.

Apple reads all of the feedback provided and will relay the information to Apple Technicians.

Feedback - iPhone - Apple

@icepromax

Check the battery usage per app in Settings/Battery, to find out, with app or process is using up your battery life more than usual.

Also force restart your iPhone, you will not lose data.

Force restart iPhone - Apple Support

Send your findings to Apple, using the Feedback Link, so that their technicians will be informed as well.

The more users report such issues, the more likely are changes in a future update.

Feedback - iPhone - Apple

And, if your battery is around 80% health, you will begin to notice changes in the performance. Apple will replace batteries if they reach 80% or less.

@ingo2711

There is no problem in the operation of my phone. Only since I installed the iOS 17.0.3 software, my battery has been draining quickly. I have turned my phone on and off many times and the result has not changed. I think the whole problem is caused by iOS 17.0.3. Because I have not made any changes on my phone. This We need to report the situation to Apple officials somehow. Even though I am running my phone in low power mode all the time, my battery drains quickly. MY BATTERY LIFE IS VERY GOOD (83%). Unfortunately, I cannot revert to iOS 17.0.0 software. My phone has iOS 17.0.0. The charging situation was better than before. So, what I want to say is that everything started with iOS 17.0.3 and I am not alone in this.

Yes, I have the same problem and the battery drains very quickly. I have to charge my phone every 12 hours. Moreover, my battery health is fine.