iPhone 7 Plus with iOS 13.4 battery drain problem

I found this on the iOS wiki entry:

Battery lifespan extender[edit]

Similar to many laptops,[41] iOS 13 has a feature to limit the battery charging percentage to 80%.[42]

Keeping the battery percentage more centered instead of complete charges and discharges reduces strain onto the battery. This reduces the battery aging of the lithium-ion battery and extends its lifespan.

https://en.wikipedia.org/wiki/IOS_13

From what I know about lithium charging for solar, this makes perfect sense. However, it means sad times for any battery less than new in an upgrade. When they say "more centered", that also means they're taking some off the bottom too. So instead of 3%-100%, the new is more like 25%-80%, BUT the battery should last twice or 3 times as long before needing to be replaced.

Correct me if I'm wrong, but if your "old" health was in the 80%s, your new would be about 62% and the bottom will be about 35%-40%?? BUT the reading will still say 0%-100%, it will just mean 0% equals the bottom of the CHARGE (20% if new) and 100% will mean 80% full.

And I'm guessing the new 13.4.1 is calibrating wildly and unexpectedly, causing quick shutdowns for less healthy batteries and short runtimes for moderately healthy batteries and ALL much less than before full access was granted. It's a long term win with less changes, buuuuuuuuuutttttttt it looks like it right now.

[Edited by Moderator]

I'm just so sick of this nonsense and all of these "fake" fixes for a REAL bug.

Let me make this very simple for everyone on here:

iOS and iPadOS 13.4.1 has introduced a major battery drain bug across the range of compatible devices. That includes my XS Max. That includes iPhone 7s. That includes iPhone SEs. That includes iPhone 11s.

Myth:

Resetting works: WRONG. RESETTING DOES NOT FIX A SOFTWARE CODING ERROR.

Restoring works: WRONG. SEE ABOVE.

Charging with a wire instead of wireless charger: WRONG. WORKED 100% UNTIL THIS SOFTWARE INTRODUCED A BUG.

Wait a few days: WRONG. IF THAT WAS THE REASON, IT IS STILL A BUG THAT NEEDS PATCHING.

Buy a new phone: I'm not even humoring this one.

The battery drain came back on my XE and the battery level graph was showing steady drain with no app listed as contributing. I realised I had added Microsoft Authenticator and enabled the passwordless mode for teleworking, I deleted it and so far the same steady drain has stopped happening. I may try Authenticator again with passwordless mode disabled.

In my case, it seems iOS 13.5 more or less fixed the problem, after nearly two months in which I could never used my device for more than 5 minutes a day while my battery health went from 95% to 89%. One week after installing iOS 13.5, I just restored my email accounts… two months useless, what a waste, thank you Apple.

I highly suggest to you Rusty_66 calling the senior advisor and run the diagnostics. They can do it remotely, and see what they say. Maybe there is some game running in the background that you are not aware off. But it is definitely affected a lot of people. A few of my friends have iPhone 11 Pro's and they charge 2-3 per week. Go and figure!

No one is telling you that. Are you actually using WhatsApp 50% of the time? If not then something is going wrong with that app, try deleting it and reinstalling or wait for an update.

Try disabling all apps operating in background.

I have did everything possible and it is still draining like crazy Updated to 13.4.1 new battery no apps no siri no location services download from ispw restore from icloud erased and restored over 10 times and guess what.

It Is The IOS Apple has not fixed yet...

Definitely an software problem, I have fairly new iPhone XS and iPad Air 3 both had great battery life on iOS 13.3.1 and after installing iOS 13.4 both devices are rubbish, the iPhone even heats up a lot, never had heating up before. Remember before with some versions of iOS 12 I had same issue on iPhone 6s and after another release and update everything went back to normal till now, we’ll hopefully Apple will get it fix soon.

Jumping in again to add that I have an iPad Pro, which worked perfectly with 20 hours on a charge. Upgraded to iOS 12, battery dropped to 4 hours. Then iOS 13, and all its permutations, still 4 hours. There is an issue with these operating system updates demanding too much of devices that came out the year before.

The best thing for those of us with Apple devices who simply want them to work again is to go to Apple feedback and leave messages for the engineers. I do this a couple of times a week.

https://www.apple.com/feedback/

[Edited by Moderator]

I've commented quite a lot on this thread and others. I have an iPad Pro that worked flawlessly - with 20 hours on a charge. After updating to iOS 12 my battery life went to 4 hours. From 20 hours to 4 hours - that happened 8 months ago. I've done two factory resets, one not from back up. Reset everything. My battery health is 92%. The problem is most definitely the iOS. I've worked with many Apple Support advisers - most of whom seemed compassionate - some of whom were terrible - and a couple who were indeed "supportive." In the end they said just hope for an update that will help. One adviser had the nerve to tell me to buy a new device - can you imagine? I feel incredibly troubled by what's happened - my very expensive device is of little use since I'm chained to an electrical outlet every 4 hours. Keep sending complaints to Apple.com/feedback for your device and fingers crossed we'll get a remedy to this problem.

Update:

recap: 4 days after upgrading to 13.5 beta 3 my phone suddenly calmed down & the cpu settled down to under 10% utilisation (previously 95-100%) which means the battery still has 40% at the end of the day.

Phone is still behaving its self a couple of days later but last night with 25% battery the phone shut down & rebooted when it cam back up it had 10% battery 9, 8, 7, 6, 5 in less than a minute so quickly stuck it on charge. Phone is still ok but they obviously haven't fixed the issue with reboots & the iOS knowing how much power there is or isn't in the battery.

Summary: thousands of iPhone and iPad users across the entire lineup of compatible devices for the relevant iOS version have been reporting battery issues stemming as far back as 13.4 but with most of them from 13.4.1. The bug carried over into every Developer Preview beta of 13.5 as well as the RTM 13.5 that most of us now have installed on our devices.

I never said it was necessarily a hardware issue. You run a battery profile on a device and then submit the files so that programmers can see exactly what is happening with the battery and when and what processes/apps are affecting it and how much. If they see that one of your apps (or more) are conflicting with the OS then they can either rectify that in an update or notify the developers that there apps are not behaving properly. This happens frequently with Facebook.

How much programming experience do you have?