iOS 15.2 Battery Drain

This is crazy they are forcing updates while so many problems with SW stability are reported for iOS, macOS, etc.

Even though problem concerns certain release, i think that problem has something to do with iCloud. Sort of: iPhone with 15.2 release is trying to synchronize data to iCloud and the process fails at some point.

Connection to iCloud account is quite important (Find my, etc.) but if you can leave without it for some time (and are not afraid of loosing some data accidentally) you could log out from iCloud account and see what happens. Just an idea. Power consumption dropped noticeably when I logged out of iCloud. but still was much above expectations. I also tried different solution with a bit better results, but cannot provide details due to terms of use of this forum.

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.

No prove for that but it really looks like you claim. I've spent some time playing with various configurations lately, and definitely see huge impact of using or not appleId on iPhone on battery life. Last example: fresh installation, logged in from AppStore level to install one app, Settings show that I'm connected to my appleId, but iCloud services are off (!). Just plain connection to appleId. Result: 15% of battery lost overnight! I logged out from my account in the morning - from now on (a few hours) battery consumption - ~0%!.

I don't know whether connection to appleId is root cause or not, but it definitely helps in my case. I think I'll setup my phone (apps, data stored in iCloud like contacts, etc.) and then remove connection to appleId completely (leaving all iCloud data on phone). There's some risk in case iPhone is lost/stolen (no Find My) but it's only temporarily (hopefully). I still hope this mess will end finally in few weeks/months and I'll connect my phone to iCloud again.

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...

I suppose everybody’s got a variety of different issues; mine is almost definitely a pre-timed battery drain. I know two other people who are experiencing almost exactly the same thing. It appears if you do a iOS 15.2 search on Google and if you see the latest press it all points towards battery drain. I am rather surprised Apple have not even addressed this.

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.

Ios 15.2 is a killer on my battery! My IPhone 12 pro is constantly going flat. Its real obvious. Im constantly charging and the battery is just draining at insane rates?? Wtf Apple? Im really at my last bit of patience with apple at this stage

I was wrong. Even if sometimes I managed to keep iPhone "stable" (small power consumption), it was just a couple of hours, and then - same story. I listened to music when walking and this beast consumed 25% of battery in less then hour!! It's crazy! I've contacted today a friend to ask how is going and first topic she mentioned was that she's .... (ok, angry) because of the issue. She's just replaced battery in November in official Apple's service and since 15.x the battery lasts much shorter then previous 3-year old battery.

It seems like the problem is really quite common. I wonder how it will end up. Some years ago there was an class-action lawsuit in US concerning battery (iPhones slowed down intentionally) which ended up with battery being replaced for free (I hope I remember correctly). It seems like now situation is similar or even worse (bug results in HW degradation). Will see.

I won’t be posting here anymore because Apple are constantly removing messages that they don’t like. This is not constructive. If the developers don’t even check this board and we have to go elsewhere to put in a recommendation I don’t even know why they have these forms. It’s just a front. Probably better to take your issues to editors of different magazines

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.

faizal73 wrote: "my iphone 7 . after update ios to 15.2 . always battery drain and sometime shutdown or restart ..."

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

Does your iPhone 7 still have its original battery?

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

Settings > Battery > Battery Health

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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.

faizal73 reported problem with draining battery after upgrade, not after battery replacement. This advice in this context makes as much sense as e.g. suggesting using screen protector. Both genuine screen protector and battery are good choice (albeit quite expensive sometimes), but has nothing to do with this bug.

fiazal73 will spend quite a lot of money and after that destroy expensive battery fast due to bug in 15.2. Bad idea. Should I plan to replace battery, I would wait till problem is over.

That's also the case of my friend who replaced (yes, in genuine Apple) battery in November and now is "destroying" it fast due to a bug (charging 2 times a day instead of once 2 days).

Technically you're right. But "device software updates" warning concerns such situation as, e.g. blocking non- genuine batteries (that haven't happened yet contrary to some non-MFi cables which were made usless after upgrade to 13.2.1 as far as I remember), lack of some reports (like battery health - this already happened) or loss of warranty (fortunately not allowed in EU where I live).

What are the chances that software upgrade will initiate non-genuine battery drain? Close to zero. So yes - I would follow your advice should such replacement be costless. But it isn't. Far from it. Apple charges tons of money for battery replacement. Spending a lot of money with perspective of fast battery degradation (due to bug) ... well, doesn't seem to be great idea.

One way or another - it's fizal73's decision.