iOS 13.5.1 battery drain

Turn of live Photos and turn off all features such as Wifi, mobile data, location, background refresh apps Raise to wake and then check.

"...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.

"...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.

I'm not even sure it has to do with background activity and might be the OS doing something under the hood that's keeping the darn things active and draining.

I have an older iPhone 6s that I've turned into a makeshift iPod. Literally nothing is on there except stock apps that I can't delete, I've turned off ALL background services, and, I keep it in airplane mode as I use wired headphones. Location services off, background app refresh off, live wallpapers off -- it's literally just a dumb media player that could connect to WiFi and surf in a pinch and take photos. Even with my battery health being 86%, I was usually able to get several days of standby and light media playback usage out of it before getting down to 15% or less. After 13.5.1, it drains by half its battery in standby overnight!

They can't blame app re-indexing in my case. I'm going to invest in a new battery just because I feel like it and like having the device as a stand alone media player. I'm taking it into the Apple Store tomorrow for battery replacement service but I don't expect miracles; the battery drain issue is clearly a core iOS flaw that needs to be fixed.

Same exact thing. Using an iphone xs and iPad Air 2. Never any issues with battery/charging etc. They would last all day or more before. Upgraded to 13.5 and 13.5.1 and battery won't stay chjarged. Spent 6 hours doing a reset. And then restore. Made no difference. Battery activity was showing 45% being used by Siri, which had been disabled. I went through EVERY app under Siri and toggled it off. Again. (This took a ridiculous long time and was probably unnecessary but, at this point, who knows?) Also was showing Mail using background at 22%. After reset I charged it to 100%. Shut off all apps. Set it down. Screen off etc. Went to sleep. Woke up 5 hours later. Battery at 25%. Called Apple. Told them and sent them screenshots. They said an engineer will get back to me.

Did you monitor usage after the reset and before restoring?

That would have been key to the exercise.

After the restore did you try the effect of changing push mail to fetch and vice versa?

Reset using Settings takes 10 minutes using Erase All content and Settings

Set up agsin maybe 15 more

Restore from Mac maybe 30

What took six hours?

They do offer such tips as do other sites

https://www.apple.com/batteries/maximizing-performance/

My favourite setting for Siri is off.

People worry about track and trace apps but let Siri or Alexa into their living room

I did a full reset of my device without restoring from backup and the problem persists. Battery drains 40% overnight on an iPad Air 3. Prior to 13.5 my iPad could be on standby close to a week. Now 24 hours and the battery is drained. This is not about some setting or app that- this is about a bug introduced in 13.5 that is causing major battery drain issues when a device is on standby.

Please stop hijacking the forum thread by telling us to turn this setting off or uninstall that app.

I posted a few days ago that I was experiencing rapid drain when on standby on a clean iOS install of 13.5.1 on my iPad. I’m now on day 5, still with a clean install and things seem to be getter better. Day 1 I lost around 40% on standby overnight. Day 5 I lost around 15%. I’m wondering whether 13.5 introduced a battery update which required a few days to calibrate?

edit: I just remembered that I turned off all location services yesterday, which may have resulted in the difference observed. I will turn location services back on and provide update.

Great!

The optimisation only really works well if you regularly put on charge when you go to bed and rise at the same time each morning. It works out your sleep pattern and charges the last 20% in the last hour or so before rising.

Shift workers and daytime top up users should steer clear

It did level off for the last hour but what do you see if you tap on the last light blue bar?

PS I find the built in clock has a reliable alarm but since about ios10 they did away with the big clock face - big step back:

Just noticed when you turn on Ipad Pro the next morning and find a 30-40% battery drain the Apple logo comes up instantly instead of about 3-4 seconds delay as it always had before IOS 13.5.1 update. Time Apple fixed this. The Ipad has not properly shut down and there is no way you can see this until you switch it back on. It only happens to certain devices at random as my wife has the same Ipad and hers is fine. This is a 100% software problem I am convinced.

Maybe you should read more as 2 answers above....

There is a guy (johnmorello)who succeeded in lasting longer on one battery charge by completely restore his phone and manually set back all of his apps.

I like to know his background activity after his action.

That has not been mentioned before in this thread and may be an unrelated problem. Getting apps to stop activity is the more common problem here.

You could start you own thread or follow the general advice of Restore as new and if it behaves restore from backup.

In all fairness, my X will sit on standby for days. As soon as ANY app is used, it causes a catastrophic battery drain issue until the phone is put back on standby. This has never been the case prior to this last iOS update, and as far as I'm aware my device is still functioning correctly from a hardware perspective, hasn't been dropped or damaged or submerged in or exposed to moisture. I'm therefore assuming that by sheer coincidence myself along with many contributors to this thread have all experienced hardware failures after updating the software. That's an amazing set of coincidences don't you think? The majority of users on this thread with known good hardware all experience issues after the software update and yet it's stated that they are suffering hardware related problems. I know that Apple do not look at this forum and allegedly distance themselves from it; it's an echo chamber where disgruntled customers who spend thousands of dollars or pounds on tech from Apple migrate as they have no choice as Apple do not seem to listen. It's all well and good telling people they have bad hardware but how good does that look on Apple? It seems they employ the 'fingers-in-ears' approach. The sad thing is that, and this has been said countless times by customers of Apple, that QA went out of the window when Mr Jobs died. I'm inclined to agree. It seems I'm a unwitting beta tester for software which brings good hardware to its knees.

EDIT

As an indication of the issue, I have taken ~5 minutes to compose this message in Safari on my iPhone X. It was at 100% charge when I started. The screen is on dimmest settings, mobile data is off and there's no background app refresh. The battery status is now reading 92%.