iOS 15.2 Battery Drain

DocJekyl wrote:

@jackv3

i’m so sorry that RESET NETWORK SETTINGS is not working for everybody....

[..]

....and I REFUSE TO LEAVE IOS 15.1.1 since Apple has not fixed 15.2 either. 15.2 MIGHT HAVE A NEW PROBLEM causing this.

1. I think hardly anybody connects iPhones to computers these days, so anyway this "trust computer" case would hardly be the reason of battery drain. BTW. I've read somewhere that it's enough to reset Privacy Settings to "untrust" computer. It seems to be less harmful that resetting "network setting", doesn't it?
2. It think it's pretty good idea to stay @15.1.1. 15. 2 is about new features (already delayed afaik), which nobody wants, and which sole input to user experience will possibly be another source of possible bugs and EVEN MORE (Apple's saying from their presentations which I hate) battery drain. Maybe I'm exaggerating but really, my feelings toward Apple could hardly be described politely (so I won't write anything).

Sing I updated my iPhone to 15.2, I’m charging my phone 2-3 times a day and my iPhone lagging and freezing quite often. Before I use to charge once a day and used the same duration and by the end of the day I’ll still have at least 15-20 percent of battery left. I have to carry the charging cable everywhere with me now but the most irritating is freezing and lagging of my phone. I think Apple should fix this bug and find a update sooner.

Barkath12155 wrote: "Sing I updated my iPhone to 15.2, I’m charging my phone 2-3 times a day and my iPhone lagging and freezing quite often..."

Barkath ~ What iPhone model is it?...

Settings > General > About > Model Name

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So apple updated my 12 mini for me. I've got mine set for automatic updates off and on NYE it still did it for me. Very upset about it. And since then, it's run very hot, the battery drain issue and the back button on certain apps also will not work either.

This is especially frustrating because I've had auto updates off since my iPhone 6. Big middle you know what to you know who.

In my experience with 15 this is a timed and pre-determined drain of battery from Apple. No matter what the usage I always have specific amounts of battery at specific times and I can categorically say that it is almost as if the battery is timed to go down at certain points of the day ; it has become a shorter life from what was once almost 18 hours which was what was advertised on iPhone max pro 12 to just under 8 hours. It’s pretty shocking.

I think it is unlikely a “planned battery drain”.

My very old iphone 4S has standby battery life of at least 5 days hahaha. Of course this is due to the famous performance throttle due to unhealthy battery.

My iphone 7 has been suffering since 14.8. It sort of suffer less on iOS15.2. But the standby battery life is 24 hours approximately.

i used both of these phones as alarm clock. My iphone 4S sometimes refuses to scream in the morning. My iphone 7 never fails.

iOS 15.2 has mild impact on my iphone 11. Slightly faster drain but still good for me.

i think they add too much features and make the iOS so complex that they can’t fix the battery issue.

tay292 wrote:

i think they add too much features and make the iOS so complex that they can’t fix the battery issue.

Yeah, that's basically what they told me in person when I came to complain about this issue with iOS 15.2 at Apple Store.

I mean we can't really know if this is actually true or they just don't wanna admit that there are some critical bugs in that update, but at least their "official position" seems to be aligned with your assumption. :)

PS That's sad how Apple handles such issues. If there is a problem, and they are aware of it, one thing that they could do is to at least let their users know that they should probably hold off on the 15.2 update for now. But they don't...

S180nyc wrote:

No matter what the usage I always have specific amounts of battery at specific times and I can categorically say that it is almost as if the battery is timed to go down at certain points of the day.

I have the same feeling with 12 Mini, constant drain no matter what.

Several days ago I wrote here that my battery capacity fell from 98% to 96% since upgrading to 15.2. Well, today it fell to 95%. 15.2 is simply destroying it. And there's nothing I can do about it.

I've received your post in e-mail but then, couldn't find it here. Strange. It's really not fair and I really don't know which part of your short input would be the problem.

Anyway, I sent feedback to apple as advised in this and other discussions. I also opened a ticked by phone. I haven't done it already but I'm planning to request Apple to allow me to revert back to 14.8 to save my battery from fast degradation caused by huge battery drain (I'll wait till tomorrow evening - Apple tends to release new versions on Thuesdays).

That's all I can do except waiting till memory leak bug is fixed in next version and having my phone connected to charger fully charged whenever I can.

Does your iPhone 7 still have its original battery? > no, but I use a good battery in the brand

And what's the Maximum Capacity % here?... > still in 100%

before update to iOs 15.2 . nothing bug like this.

Still draining with the latest update, though odd behaviour with 100% for a while then a sudden drop off and then a bit of a plateau and then further drain and so on. Hardly anything actually on (notifications off, background off etc). Battery is fine according to the battery section (if that means anything). All happened with the update of 15 and then to 15.1 and 15.2. Mentioned it to friends who are on 14 and they are now not moving to 15. Apple truly need to fix this issue otherwise many will just stay on 14. I am using an iPhone 7 but it is a year old (though obviously been sitting around somewhere waiting for me to buy it)

Apple officially announced in 2021 that 14.x major version will be supported in parallel with 15.x. Now we know why. They most probably expected that there are tons of new features in 15.x that would most probably introduce bugs (which is exactly what happened as we see), and allowed to postpone upgrade to 15.x line.

Some corporations my friends work for did it - good decision.

Lesson learned.

I’ve got the new version yesterday. The overnight drain seems to be fixed.

Just charged my phone to 82% and the battery dropped only 2% during the night time.

Still got some issues while using instagram or facebook: the phone get so hot and the battery drain so fast while watching stories on instagram, that i’m barely using both apps for too long.

Hoping that’ll be fixed. My IP11 only have 4 months of use and 97% of battery health.

ali83iraq wrote: "now 15.2.1 update available my Iphone 7plus in 15.2 Would you guys recommend me to update or the battery drain will be worst??"

ali83iraq ~ With an older iPhone model such as the 7 Plus, it's worth checking the battery...

Does your iPhone 7 Plus still have its original battery?

And what's the Maximum Capacity % here?...

Settings > Battery > Battery Health

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csbubbles wrote:

For those curious about 15.2.1 – iOS 15.2.1 Battery Drain / Battery Performance Test. I just bumped into it accidentally on YouTube.

So basically every phone (except XR, 11 and 12) becomes a bit worse as iSO version number increases. The exception is iPhone 13 which behaves MUCH worse on 15.x version than on 14.x.

EDIT: The same could concern iPhone 12, but no measurements for 14.x version were performed.