iOS 15.3 battery drain

Another user here with two iPhone SEs with battery life killed by 15.3 and not improved by 15.4. My original version SE will no longer last much over half a day without charging, lucky it's a backup phone. There's no point talking about what apps are draining or how old the phones are or how battery health is, as both phones were fine until the day 15.3 installed. Very poor show from Apple.

Thanks but I'm too busy working full-time as a senior software engineer to spend all day on forums.

Your battery suggestion ignores the fact that the battery drain issue appeared with the installation of iOS 15.3. So prior to installation of 15.3 longer battery life, immediately after installation of 15.3 shorter battery life. It doesn't take too much deduction to identify the iOS 15.3 update as the cause.

It may well be that my old SE's battery was damaged by the upgrade (not that that is an acceptable thing) but my newer SE is also displaying greater battery usage.

It doesn't matter how much anyone tries to talk the issue away - 15.3 and 15.4 releases of iOS have resulted in greater power consumption and faster battery draining, no question.

YodanLevy wrote: "...Dear apple, please fix!"

Yodan ~ Ask Apple to fix it here:

iPhone Feedback

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General battery advice after update (killed my battery)

User tip 

https://discussions.apple.com/docs/DOC-250004641

Thanks for your question no you cannot retro-fit iOS.

Try these tips

General battery advice after update

https://discussions.apple.com/docs/DOC-250004641

And then User Tip

Check iphone battery for self discharge

Mine is doing the same thing and is much worse with 15.3 which I thought might improve things. Apple needs to address the reasons for this.

Hello LukeSlaw,

Check for a rogue app constantly running:

Go to Settings > Battery > BATTERY USAGE BY APP to see the apps that are consuming your battery.

Good luck.

Just checked and nothing seems abnormal!

Battery draining like 4hours screen on time on ios15.3 it contains many bug and apple is sending those

15.3 definitely has battery draining issues. 12 Pro and get maybe half days battery life doing nothing.

No it doesn't. Look at the post above yours. You are in control.

I have iphone 11 my battery health drop from 99 to 93% after update. Phone consume more energy.. Apple please test your code before deploying!!!

Same thing here! My phone goes from 100% to 1% in minutes and then stays there for hours. This must be a firmware issue. Apple please fix...pleeeeeease.