iOS 13.5.1 battery drain

There is no inbuilt problem with this 13.5.1 update, mine is just great, but it is possible to have a bad update over the air with a small patch like this.

Always use a mac or pc to do all iphone updates if you possibly can.

So to fix this use a mac or pc to

Backup

Restore as NEW device

Restore from backup.

Do not miss out step 2

Update all apps. If they still burn background battery contact the developer

PS anyone who goes to bed with the phone off charge has a strange idea of charging cycles. Latest iOS even tries to predict when you will wake up and charge the last 20% in the hour before.

i.e. it assumes overnight charging.

"went to bed and woke up to a flat battery" Der!

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.

"...I do all my updates via Wifi for the last 10 years now, have never used PC/MAC to do this...."

I suggest you learn from this and use a mac or pc in future, and immediately to get you out of this, as per my previous post.

As I said already, others (3 that I know of) _who actually have this battery issue_ have already tried this method to no avail. So it apparently has nothing to do with this, but is something else. If I knew it would actually help, I would have tried it by now. But so much effort for nothing, no thanks.

Will do some tests with an old iPhone 6 I still have lying around.

Weird indeed, since 13.5.1 my iPhone 7 has battery drain problem, slow charging issues AND gets very hot for nothing. Was my mistake updating from 13.3 thinking this will improve somewhat my phone. Is not fair Apple stills making us testers of their own bugged updates :(

jayo007 wrote:

hopefully they see this tread and act as this is a nightmare at the min

Apple doesn't read here for suggestions or feedback. If you believe your phone is experiencing a problem, use the Contact Support link at the top right of every page of these forums and let Apple know.

JBERUMENB wrote:

Or the other, the hardway, making a massive suit. I believe is easier for Apple to fix the problem with a patch like 13.5.2

If you have a hardware problem with your phone, neither a patch nor a lawsuit will help. While you're waiting, why not discuss the matter with Apple?

Like Peter, I don't have a problem.

Experiencing the same issue which few people are having, was 24% charge on my Xs Max and went to bed at 12am with all background apps clear, WiFi, mobile data, location, bluetooth and everything off, checked in the morning at 9am the battery was 12% with nothing happening on backgroud, it only eats up 4 to 5% max in overnight charging was on 13.4, bad decision on updating, did a factory reset and back up after updating to 13.5.1 shhhh.

I have an iPhone 6S and after the upgrade it gets hot & battery drains very quickly. Also I am not able to connect to Wi-Fi through this phone after upgrade. The issue was sporadic yesterday, but now unable to connect from today.

It seems to have something to do with iCloud sync. I thought I ruled this out by putting iPads on airplane mode, but on iPads the airplane mode does not disable Wifi (whereas on Iphones it does). I should have noticed the Wifi icon still being there after enabling airplane mode, but somehow 'Airplane mode' was still synonymous to 'disable all communication' in my mind.

When disabling Wifi, the CPU load goes back to 3-5%. When disabling iCloud mobile sync on iPhone + disabling Wifi, the problem also goes away.

This leads me to believe the latest upgrade is doing 'something' regarding iCloud sync (of photos). We have library of 13.000+ photos/ 400+ videos, so if anything is being done it will most likely take 'a little while'.

My iPhone XS has returned back to 3-5% CPU usage again (with Wifi enabled) after 2 full days or so, so I guess this one is done processing/resyncing. My wife's (slower) iPhone SE is still at 60-80%CPU for most of the time for the last couple of days.

I've disabled the mobile sync on there, so at least when she goes out of the house, the battery won't drain from 100% to 35% in a matter of 3 hours like it did this morning.

Can someone who has same issue also has a large(r) Photo library ?

I expect the problem to go away after some time now on all devices. What it is doing, no idea, this is first time I've seen this.

You’ll have to explain to me how there’s any difference between the binary being pushed as an OTA update versus via your Mac tethered. The update is verified before being installed. For the record, I have three different devices on the new release, and one of them was updated directly from my MBP and still having extensive battery drain.

"...There is no difference, but people who do not have the issue see this difference (OTA vs user-unfriendly) as the solution. It is not..."

Many times it is. There is no such thing as a bad OS but rarely you can have a bad update and they are more likely with an OTA patch.

Much more likely is app devs haven't updated the apps.

Wr don't often mention antivirus in iphone forum but I hope nobody installed any.

Hey doesn't bother me, if you don't want to clear it down then live with it.

Or, I will explain what I do. When I install a new OTA update, no matter what it is, I always restart my iPhone and erase everything completely, I do not make backups because the applications that I use are few and my photos and others are on iCloud.

And even so I have the problem that it heats up and consumes too much battery, it has nothing to do with the way in which or how I update it, because I always do the restore, and can confirm that, since I installed 13.5.1 my battery It is very bad, I have 95% since I changed the battery for a new one in a legitimate Apple store.

So the theory that there is a poorly optimized application does not apply, because they are the ones that I have always used since 2016, as I mentioned. I restore my phone from time to time and have never experienced this until 13.5.1 from 10.1

My phone was perfectly fine, no problems at all in all this years, not until iOS 13.5.1

I dont get your point of defend 13.5.1 even if theres is a plenty of users complaining about this matter, and you are on deny telling us is not the update and the problems are our phones, and even suggesting sell our phones, and if you look around there are users using XR and 11 and iPads reporting the same problem with 13.5.1!!...you are funny

Here in Belgium I have the same issue as many others, but I encounter them often with apps used only in Belgium and the Netherlands I guess.

The background drainers are HLN, iCulture and sometimes Buienalarm.

I've had also the clues to update my iPhone via Mac/PC.

So I made an iCloud backup, restored my XsMax via DFU on my iMac (running latest available macOS Catalina). After installing Face id etc, I Setted back the iCloud backup.

First 3-4 days a massive battery drain including the running background apps. I know this is a normal behaviour after a clean install or a big update.

The drain has been stabilised now, but I have to do a forced shutdown of the mentioned apps, otherwise my Phone is almost completely out of battery after the working day. This isn't solved yet after the 4 days.

So the update via computer isn't a solution.

@peter_watt: it seems like you don't suffer the issue. In the beginning of this topic, people are reporting of some so called "infected" apps. Maybe you could install them on your phone and check the result.

If, in my case, I don't use iCulture or HLN, I was also free of bugs.

I'm an iPhone user for 2,5 years now. Never had this issues before and I've always used this two apps.

(I've left Android, just for this kind of bugs... regrettable)

@Mikey Watson: LOL, and if it's indeed an iOS bug, you've got the same issue with your new +1000$ iPhone...