iOS 15.3.1 Overheating and Draining battery

Hey rumeet,

It appears that you're having a couple of issues after updating your iPhone 13 Pro Max to iOS 15.3.1. It's getting warmer than it used to and the battery life isn't lasting. We're glad to glad to provide assistance.

If your iPhone, iPad, or iPod touch gets too hot or too cold - Apple Support -- Review the information provided in this article for the advice Apple provides when your device is getting warmer than expected.

iPhone Battery and Performance - Apple Support -- This article has great information about the battery of your iPhone.

About the battery usage on your iPhone, iPad, and iPod touch - Apple Support -- Use the steps in this article to determine which apps have been using the most power for the past 24 hours and last 10 days. Either take screenshots of what you've found or note which ones are using the most and save the information for later.

Batteries - Maximizing Performance - Apple -- After reviewing the information under "General Performance Tips", go to "Tips for iPhone, iPad and iPod touch. Apply any of the tips provided and review the battery usage after a few days of applying those tips. Compare what you're finding now to what you found earlier to see if there's any improvement.

About Optimized Battery Charging on your iPhone - Apple Support -- This article applies more to the battery health you learned about in "iPhone Battery and Performance" above. To help your battery last longer, we recommend using Optimized Battery Charging.

Feel free to get back to us with any questions or problems you may have.

All the best.

Hi

If you updated device 2-3 days ago - this is normal

If it keeps happening for longer period, I'd offer to check https://support.apple.com/en-us/HT208387

If this doesn't give you an answer - contact support.

I was having this issue and Google brought me here. I eventually just decided to restore the phone after backing up to my local computer. After the restore completed I restored the recent backup to my phone. I've not seen these issues any more.

Same thing on iPhone 11 Pro Max. Certain apps now cause the problem, if I open chrome on certain websites it will overheat.

if I use 9GAG, it will overheat. Instagram and YouTube run without this issue.

shame, shame.

I have and iPhone 12 Pro with iOS 15.3.1 and it is also draining the battery. I looked at Battery under the Settings app and it says that battery usage is 42% from the App Store with 2 minutes of background activity. Something is clearly wrong. My battery goes from 100% to 20% in just 5 hours. I have eliminated most items from using background and even turned off automatic updates so that don't happen in the background but still no changes.

Mine got somewhat improved the last two days, still not performing like before but better. I saw others saying that too.

it’s obviously caused by iOS last update.

I also reset my network settings (someone wrote it helped him).

Exact same problem here. I hadn’t updated all of my apps since the update. Just did so. Thinking it could be one of those causing the problem.

updated yesterday since apple pushes them so hard. Now my 12 min barely opens a web page, most of my apps don't work and my battery with is at 87% health is draining rapidly with very little use. I mean I can't even open a web page over wifi. Followed all the troubleshooting steps and nothing helped. Cool, thanks apple for making my phone pretty much useless! Super happy guy

My Iphone 7 (A1778) was working perfectly prior to IOS 15.3.1

The battery life was OK and run all day without a charge.

Now the Iphone is unusable this morning after a charge with lightening cable to 100% unplugged charger and 16minutes later down to 32 percent.

The battery is only 12 months old.

Now have to waste more time trying to go back to the previous IOS that had no problems.

Did you ever find a solution to battery drain ? I’m getting this on my iPhone 13 iOS 15.3.1

Yea mines the same still drains. Shouldn’t do not sure why it does maybe it’s just the software