iPhone 14 Pro Battery Draining After iOS 17.4

I have physically seen this issue and there is no exact reason for the battery drain but it does seem to happen fairly quickly and even if you have limited some of the display features it still occurs. This is a serious issues and needs addressing ASAP from Apple to resolve the issue. Power Save option should only really be used when your are getting fairly low on battery. It shouldn’t be suggested to assist in this kind of issue. Background refresh can also help but again normal behaviour of batteries from series 10 phones and above are all experiencing this drain. To me on a pretty much new iPhone 14 Pro Max replaced recently by Apple I am seeing slight decrease in battery life after the update. I have Dark mode on usually I have white point reduced and don’t use Auto Brightness. My phone last around 10 hours with battery normally ending up at around 20% from 80% but this certainly seems to have been shortened recently. It’s almost like the processor perhaps is consuming more battery than it did previously and this is obvious in some benchmark tests

iOS updates aim to enhance user experience, boost security, and fix bugs rather than disrupt core features. Battery issues after updates might stem from underlying, unmentioned factors. Updates won't typically alter personal data but may refine settings or features. Backup before major updates for safety. Review Apple's update details and backup advice for a smooth process.

Kindly consider checking your settings and addressing any device issues before attributing the issue to external factors. This could be a pure coincidence that the iOS update affected the iPhone Battery.

Before initiating a standard iOS update, it's advisable to create a backup. Have you completed this step? If yes, proceed with the restoration from the backup.

See what each update does: About iOS 17 Updates, About iOS 16 Updates, About iOS 15 Updates, About iOS 14 Updates, About iOS 13 Updates, About iOS 12 Updates, and so on...