iOS 13.5.1 battery drain

If 13.6 didn't do it for you like it has for some others then you need to look at the other reasons and remedies, starting with taking it back to factory settings without recovery from backup (like I used to do on my S5)

Here is a guide for those steps:

How to back up your iPhone, iPad, and iPod touch

Restore your iPhone, iPad, or iPod to factory settings

time and again it has been stressed thete is no one single cause or remedy.

Last weeks the battery was down to 10-20% at the end of the day. Since 13.6 I have 60% left at end of the day with same usage (actually a bit more since I also watched Netflix for 30 mins or so next to the 'regular usage'). For me the issue is resolved with 13.6. Finally.

Hi there! If you have reset all settings, then i advise you to change all the location services settings and background app refresh settings again. There are many videos online wherein you can get info about which services to keep on and off for better battery life. Do them as per your need. In addition to that perform all the steps that I have mentioned on my post “Plausible battery issues fix for ios 13.5.1”. Two key points i would like to add. Restart your mobile every 7-10 days once. Also another experiment i did was that when my mobile is on 3G/4G/LTE network, the battery consumption is more (gives 4-5mins per battery %) and while my mobile is on mobile-wifi or home-wifi, the battery consumption is less (gives 12-15mins per battery%). So i suggest you to be on a wifi network most of the time if it is convinient for you. Hope this extra info adds a few hours to your battery life! Good luck!!

Recalibration is a contentious subject.

My 6S was set up as new and had stepwise battery drop eg quick drop to 67% for much of the day then another sudden step drop.

I fixed it by recalibration except my method is a bit different...

Run completely flat with bright screen and flashlight

Leave flat for 1 hour only

Charge to 100% and leave on charge 2 hours more

Disconnect and immediately force restart

Have had same battery drain issue: NO apps show running and steady battery drain.

Tried many suggestions and finally restored as NEW and manually added apps back. Only restored saved data in iCloud—just data. Btw, lost Health ID info.

No battery drain, including after adding back Watch.

Restored 12,000 songs yesterday to Music. Battery dropped 22% overnight with nothing running. Used memory creates an issue???? Anyway, will remove music and see what happens.

This whole issue is new since 13.5, I think. Battery Settings info is useless as it shows nothing using the battery.

Yup battery settings gives app usage (in minutes not watts so even the size of the column is not valuable) but does not show processes like spotlight indexing, or music or photo analysis.

Reset to as-new phone and rebuild the app portfolio has been a main recommendation since the page 1 of the thread.

Hi Peter,

do you have auto dark mode enabled ?

if not, try to enable it. Many devs are saying that the bug is linked to this feature.

Same happened here on the 3 iDevices we upgraded yesterday to 13.5.1 (still have 2 other iPads on 13.4, leaving as is for now)

My wife's iPhone SE is getting awfully hot after the upgrade. Mail is using most of the battery while she is not using it (so background only). For me on iPhone XS it is saying Siri is using 70%. Again background only, as I don't even use Siri (disabled it now).

iPad Air 2 has gone to 60% in 1 hour or so, when just doing a bit of browsing. Normally this is less than half.

I do all my updates via Wifi for the last 10 years now, have never used PC/MAC to do this. This is the first time I encounter this 'battery drain' issue. I really hope they bring a fix for this soon.

From other people I heard disabling Bluetooth + refresh in background solved it for them. Obviously I'm trying this as well now, but it's too soon to say if this is actually helping. It does seem to be an issue with apps using lot of CPU in background though.

Also from another (Dutch) forum I read people had already tried backup/restore, but that did not help either unfortunately. So don't spend hours on that.

Did another test with 4 iPads. Only the top left iPad (iPad 6th gen) is upgrade to 13.5.1, the other 3 are iPad Air 2's that are still on 13.4.1. I've rebooted all 4, waited a while and disabled background refresh, closed all apps, and set them to airplane mode.

The 3 iPads with 13.4.1 are doing fine, 4-10% max. The iPad running 13.5.1 is the only one that uses 40-70% CPU (see CPU graph).

Unfortunately since iOS 12 or so, you're not allowed to view the background processes anymore ('this feature is no longer supported in iOS)

Now obviously the other difference is that the 1 iPad that I upgraded to 13.5.1 is the only iPad 6th gen, but I don't want to upgrade any other right now, knowing it will probably break it as well.

On iPhone SE and iPhone SE it is the same behavior. CPU load stays 30-40% or so.

iPhone XS (13.5.1):

Rather aggressive response.

OK so you need to find out why your setup is burning battery and most peoples are not.

Apps is a good place to start. You probably have the same set on all your phones

Prepare your phone as if you were selling it. Set it up totally vanilla with just your apple ID and nothing else.

Is it still a burner?

https://support.apple.com/en-us/HT201351

You are spot on. It is troubleshooting 101. What has changed? IOS. I would point at certain apps (in absence of your posting) if they had not been upgraded to take advantage of major changes, but this release was mainly for preventing jailbreaks and clearly something else was tweaked in the process. And this is being publicized all over the web starting with CNET, so I'm sure it will get resolved. Cheers.

Out of that "collection of words" I did notice that you said 100% was not reached.

Turn off the optimised charging.

then

run it completely flat

Charge to 100% plus 3 hours

Unplug and force reset the phone by holding in vol down and side button til the logo appears

The same happened with my iphone XR. My phone was very warm even if i hadnt used it for a while. Using this thread, I realized i could put my battery on low power mode, and when the background activity is limited my phone is not heating up - but yes this is bad!!

Going through the same issue. Seems to have developed after upgrade to 13.5.1. iPhone is 7 plus. Initial support call to Apple thought that because camera app was on in the background and showed 61% battery usage, it was the culprit that totally drained the battery overnight.

Issue continued with total battery drain while in standby overnight. Next step we turned off background App Refresh. Battery still fully drained overnight.

Also had done Factory Reset and then restored from current Backup. Didn’t resolve battery issue.

See pic showing battery drain

Next test step, which will be unwanted, will be to do Factory’s Restore and NOT DO A RESTORE FROM CURRENT BACKUP. Let that go for a day or two and see what happens.

I might contact Apple Support again to see what they think given initial determination has not resolved the issue.

Can I please know which App was running in the background? Because if it were Siri, I still have the same problem, so I disabled it through Screen Time > Content Restrictions.

I just posted my battery results in this thread. And did you set up your iPad as NEW or did you use the iCloud backup to restore it? If so, I’d recommend you to set up your iPad from the scratch and do not reset it through Wifi. Do it using iTunes.

Hope this helps. Cheers!