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My iPhone 6s and 7 where fine on 14.8.1. but since iOS 15.x they‘re a mess. Sluggish, battery drain, sometimes they don‘t react on touch inputs and you have to wait 2-3 seconds for an other try. Its really a disaster.
Started the day ios 15 was on the phones.
 
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Bah, I can't believe no one has asked this including me... but in Settings, Battery, it shows battery use by app. Anything suspicious there?
Nope, nothing suspicious. But hardly anything is installed atm.

I install apps one by one now,
So far banking and walking/ running apps only. And WhatsApp and Signal
I find Whatsapp to be battery intensive
Safari too, but that seems normal behavior since i use the web to access info now and not the apps, so that's substitution.
 
My iPhone 6s and 7 where fine on 14.8.1. but since iOS 15.x they‘re a mess. Sluggish, battery drain, sometimes they don‘t react on touch inputs and you have to wait 2-3 seconds for an other try. Its really a disaster.
Started the day ios 15 was on the phones.
Similar behaviour here for older devices. No cause yet other than well... iOS 15

So that's for SE1, 7 and iPad mini 4

For 12 mini it is (was?) just the astonishing battery drain 6-8 hours of moderate use (no gaming/hardly video)

About buggy:
- screen freezes from time to time
- general unexpected behaviour/e.g misalignment of SIM pin keypad making input impossible (to name one)
 
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Similar behaviour here for older devices. No cause yet other than well... iOS 15

So that's for SE1, 7 and iPad mini 4

For 12 mini it is (was?) just the astonishing battery drain 6-8 hours of moderate use (no gaming/hardly video)

About buggy:
- screen freezes from time to time
- general unexpected behaviour/e.g misalignment of SIM pin keypad making input impossible (to name one)
Something is wrong here. I've got an XS Max and never see either of those.

EDIT: What's battery health at (Settings > battery)?
 
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Similar behaviour here for older devices. No cause yet other than well... iOS 15

So that's for SE1, 7 and iPad mini 4

For 12 mini it is (was?) just the astonishing battery drain 6-8 hours of moderate use (no gaming/hardly video)

About buggy:
- screen freezes from time to time
- general unexpected behaviour/e.g misalignment of SIM pin keypad making input impossible (to name one)
There is definitely something going wrong with your 12 mini. That is not the expected experience nor is it what most people are seeing.

“6-8 hour of moderate use”
That one is hard to judge. The rated battery life is usually calculated with fairly minimal usage and low screen brightness. It is intended to give you a max range. There is no way to really estimate what a “typical” usage and battery life are. Your best bet is to compare before upgrade and after upgrade, which you may have done. Even then, the first install of an #.0 version typically is less efficient and subsequent releases address that.

Sorry that you have to go through this. It can be hard to track down.
 
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Agree. Bad battery life started after iOS 15 update on my iPhone 12. Continue to be bad on iPhone 13 Pro even after clean install without backup restore.
I also see few bugs like with camera that sometimes not responding.
watchOS 8 is also bad joke. Buggy as hell.

Funny is that iPadOS 15 seems to be ok to me.
 
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I also see few bugs like with camera that sometimes not responding.
watchOS 8 is also bad joke. Buggy as hell.
Same problem here with the camera, not always but too often. I think there are some background activities that slows down the phone so much, that everything becomes sluggish.

Haha watchOS 8 is really a joke. My Apple Watch 3 was perfect on OS 7 and now with 8 it feels like a AW0 or AW2. Skipped app open animations, slow app starts, reloading of apps, which were in the background.
Never really had problems with apps reloading before. Even my AW 0 or AW 2 don't reload the stock apps.
The 2021 SW releases from Apple are all a mess. :(
 
iPhone 13Pm here. No issues. iOS 15.3B2. The only problems I had was on 15.1.2 I think? Heating issues. But my device runs super smooth and fast. Battery lasts all day unless I’m gaming for hours on end.
 
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Unpair the watch from you phone, see if the battery drain persists. There was some reports of excess battery drain with an Apple Watch pair.
when I did a DFU of the iPhone without a restore, I was obligated to unpair and re-pair the watch, so that's a: done.
A DFU with an 'everyday' phone is a pretty fierce thing to do since I constantly find out I miss stuff or have to redo that. but so far the phone is at 30% at 0.03 and was disconnected from the charger at 14:03.
That's 10 hours for 70%=7% hour for:
According to screen time 6hours (5h54)
- Safari 3h30
- Whatsapp 30m
- Signal 20m
- Settings 25m
- Podcast
- Running (nike running app) 11m?
- idling?- probably9,75-6=3,75

Guesstimating the real life battery time to around 14 hours, for now* that's twice as good as it used to be before the DFU. Given the battery health of 84% (86% according to iMazing on MacOS) that's quite normal behavior now.

Side-notes:
- AdGuard is installed since a few hours, no DNS set yet (so system DNS)
- FileBrowser Pro is not installed yet
- WhatsApp and Signal were relatively silent today (Sunday/weekend)
- No calls were made
* somewhat crippled iPhone with only a few apps and not a complete copy of 'everyday use'
** somewhat cripple Apple Watch with only a few apps and watch faces
 
Agree. Bad battery life started after iOS 15 update on my iPhone 12. Continue to be bad on iPhone 13 Pro even after clean install without backup restore.
I also see few bugs like with camera that sometimes not responding.
watchOS 8 is also bad joke. Buggy as hell.

Funny is that iPadOS 15 seems to be ok to me.
I'll spare the complaints about WatchOS 8 for my next rant-post ok ;)?
 
when I did a DFU of the iPhone without a restore, I was obligated to unpair and re-pair the watch, so that's a: done.
A DFU with an 'everyday' phone is a pretty fierce thing to do since I constantly find out I miss stuff or have to redo that. but so far the phone is at 30% at 0.03 and was disconnected from the charger at 14:03.
That's 10 hours for 70%=7% hour for:
According to screen time 6hours (5h54)
- Safari 3h30
- Whatsapp 30m
- Signal 20m
- Settings 25m
- Podcast
- Running (nike running app) 11m?
- idling?- probably9,75-6=3,75

Guesstimating the real life battery time to around 14 hours, for now* that's twice as good as it used to be before the DFU. Given the battery health of 84% (86% according to iMazing on MacOS) that's quite normal behavior now.

Side-notes:
- AdGuard is installed since a few hours, no DNS set yet (so system DNS)
- FileBrowser Pro is not installed yet
- WhatsApp and Signal were relatively silent today (Sunday/weekend)
- No calls were made
* somewhat crippled iPhone with only a few apps and not a complete copy of 'everyday use'
** somewhat cripple Apple Watch with only a few apps and watch faces
You can't strictly go by what is shown for screen on-time because it is a moving 3 hour window and can include activity done during charging. Also, you would need to include screen off-time as that also uses battery.

I honestly think the iOS battery usage charts are pretty much useless. Can you post your 24-hour battery usage chart with "SHOW ACTIVITY" select so that the apps are shown as time (not percentage).

Now that you have your phone in factory state, you can start adding back in. I would suggest you start by pairing your Apple Watch and see if the battery drain gets bad again. After that do baby steps, that way you will know when something goes wrong with battery life.

Can you post your 24-hour battery usage chart with "SHOW ACTIVITY" select so that the apps are shown as time (not percentage).
 
For 12 mini it is (was?) just the astonishing battery drain 6-8 hours of moderate use (no gaming/hardly video)

About buggy:
- screen freezes from time to time
- general unexpected behaviour/e.g misalignment of SIM pin keypad making input impossible (to name one)
I think sometimes theres misconception. People associate gaming/video as the only “heavy” use of a phone. Although that’s true, chatting and browsing social media like Instagram are actually heavy use as well. Biggest battery drain on a phone is the screen and cellular radio. Chatting is big user of those, as the screen is always on and every action is a push notification event. So the screen and modem remains active all the time. The constant interaction in chatting means the CPU is always active as well. I consider chatting to be heavy use.

Moderate use is simple web browsing (no complex sites), where the interaction is mostly passive, thus the phone’s modem and CPU can go into idle mode more often. Light use means having the phone not in use, just for it idling and waiting for a phone call to come in. That’s my definitions, and thus I have better expectations on my phone’s battery life.

The screen freezes and SIM pin alignment are news to me. I would report to Apple support (take screenshots if possible).
 
when I did a DFU of the iPhone without a restore, I was obligated to unpair and re-pair the watch, so that's a: done.
A DFU with an 'everyday' phone is a pretty fierce thing to do since I constantly find out I miss stuff or have to redo that. but so far the phone is at 30% at 0.03 and was disconnected from the charger at 14:03.
That's 10 hours for 70%=7% hour for:
According to screen time 6hours (5h54)
- Safari 3h30
- Whatsapp 30m
- Signal 20m
- Settings 25m
- Podcast
- Running (nike running app) 11m?
- idling?- probably9,75-6=3,75

Guesstimating the real life battery time to around 14 hours, for now* that's twice as good as it used to be before the DFU. Given the battery health of 84% (86% according to iMazing on MacOS) that's quite normal behavior now.

Side-notes:
- AdGuard is installed since a few hours, no DNS set yet (so system DNS)
- FileBrowser Pro is not installed yet
- WhatsApp and Signal were relatively silent today (Sunday/weekend)
- No calls were made
* somewhat crippled iPhone with only a few apps and not a complete copy of 'everyday use'
** somewhat cripple Apple Watch with only a few apps and watch faces
I believe you just figured out why people were complaining about the 12 mini’s battery life. ;) Meaning it’s not good to begin with.
 
I believe you just figured out why people were complaining about the 12 mini’s battery life. ;) Meaning it’s not good to begin with.
that was not my experience and the fuzz about it was highly overrated my XR had an exceptional battery life but the 12 mini did very well until the update. It had to stretch further (below 20% battery life) but it survived the day which is all that really matters.

- Chatting is heavy use in my perspective. It's actually not about perspectieve it is/was about 6-8 hours battery life (for now 12-14) and adding apps one by one and on a 'need to have' basis.

FYI: I think I use the same simple determination for 'heavy', moderate or light use 'Calling, gaming, video and/or glue to the hand social' vs 'some calls, some texting, casual browsing' etc. vs 'my dad: oh yes I have a phone, oh it's ringing, where is my phone?'.

@Taz Mangus : I used screen time partially to determine more accurate use. For now I won't post screen dumps of all. As I said I disconnected the battery at 14.03 en wrote the roundup from 22.40 to 23.03 and rounded of the figures, most important were mentioned.

@All To clarify:
Sluggishness (in relation to the previous versions) is really only on pre 12 stuff we own/I know off and pretty widespread:
- iPad Air 2 x2- which has long been the best value iPad ever made, unstoppable (unfortunately quite hard to repair too)
- iPad mini 4
- the SE's from my brother and father (also best small phone ever made price/value), as said they suffer from high drain too. It's sad those phones can't go back to previous iOS versions.
 
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I fell your pain. iPhone 11 Pro, 8, SE 2016 all have notable battery drain despite them either having new or ok batteries. Performance is, not good for the price, 1.145€ ~$1300, for a phone I can’t enjoy is garbage. And while I’m at it, MacOS is just as bad as iOS. You’re not alone I fear, you’re not alone.
 
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Day2
23:30; 15,5 hours after charging at 10% let's call it a day.

So far DFU and no backup worked splendid. Too bad the real culprit (app/(system)process) has not been found yet.
Safari as a replacement for all apps isn't that bad either
94BD9268-46EE-45CE-9816-41ECBE5F32BB.png
 
Day2
23:30; 15,5 hours after charging at 10% let's call it a day.

So far DFU and no backup worked splendid. Too bad the real culprit (app/(system)process) has not been found yet.
Safari as a replacement for all apps isn't that bad eitherView attachment 1945825
That battery usage chart shows 4:50, 90% battery usage. What is shown, by iOS, for the on-screen and off-screen times includes when you are charging.

It appears that you have installed WhatsApp and other apps. If you intend to figure out where the battery drain issue you need a baseline sanity in factory state. This also means you should not pair your Apple Watch, to your iPhone, just yet.
 
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2 months later:
Battery life still crap (<8 hours) on:
12 mini (83% battery)
SE first gen new premium battery

The mini is my everyday phone so 'no WhatsApp is; no option'
Overal battery consumption is 'very steep'
It's a dual sim 5G phone with 2 sims and mediocre reception so I guess the wireless radio is killing it. (The SE is on 4G however)

I'm in love with the form factor and balance but not with the battery life. With my hands I rather have a max 5.4-5.8 screen (XS size) instead of the bulky 6.1 that i always felt i had to overstretch to reach the furthest corner. Since everyone is so obsessed with large phones and therefore the 14 mini is not coming i guess i might try the 13 mini 'under protest' since i still feel it's basically an iOS issue.

I often hear the same complaints around me about 'battery life draining 'much quicker than before' so that's not good for the brand loyalty.

It's 11.48am now. 41% battery left after 4.5 hours and 2h10 of safari use (twitter & this forum) that's heavy use but not okay imho on full reception AC WiFi
 
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I’m still on 14.7.1 on my 12 mini. Glad I never upgraded. No issues with this build thankfully.
 
I’m still on 14.7.1 on my 12 mini. Glad I never upgraded. No issues with this build thankfully.
I think it’s specifically dependent on usage and user set up. So far 15 battery life has been outstanding on our 4 devices, 2 phones, 2 iPads. I have only a couple minor Safari related issues that came with 15 that were not present in 14.
 
The battery draining is annoying! Lost 20% on average usage since i installed iOS 15.3.1 on the SE1.

15.4 seems much better on SE1 than 15.3.1

on that, and I think 15.2 or something I was watching it drop by the percent looking at the Home Screen legitimately every 30 seconds.

I went 14.1 to 15.1.1 on 12 pro seems good
same with 14.5 to 15.1 on M1 11", seems better
14.8 to 15.1 on SE2, seems a bit better or the same.

Why 15.1.x you ask? Jailbrek possibilities soon
No other 15.x versions to reference and don't doubt people are having issues quality control always seems like roulette even from a minor version to another sometimes.
 
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