iOS 15.2 Battery Drain

Me too. Siri has been at the top of my battery usage list. Did turning off Hey Siri solve this completely for you?

Grhapple1 wrote: "Installed 15.2 on 12.18.21 on my 7 plus. Battery soon drained and would not charge..."

Does your 7 Plus still have its original battery?

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

Settings > Battery > Battery Health

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A few problems here

1. Mine is working fine so what is it they should fix?
2. Have you gone to Settings > General > Battery and checked to see if some process/app is causing the problem?
3. Apple is not here, you are just yelling at fellow users. Click on the Get Support link at the top right of this page to contact Apple Support and yell at them.
4. While you wife may have good battery life she is missing some critical security updates that were released.

The annoying thing was it was fine, lasted forever before 15 and now it is useless. Perhaps it is time to get the battery upgraded but personally still feel that 15.2 is the real killer. Will take it to my local Apple store and see if it can be fixed, especially annoying as I still have many months to go with a contract.

15.2 ruined my iPhone 8. Prior to this update, battery health was 93% and it lasted a full day of moderate use. Right after the update, it would drop from 100% charge down to 40% in a few hours. From there it dropped as low as 11% within a few more hours. Battery page showed activity in the middle of the night with screen off, so I'm guessing that was the indexing. But even after that was done, everything about the battery was weird. The percent would drop to low 40s, then I'd plug it in and it would instantly shoot up to low 90s, then drop to 80s as soon as it was unplugged. Health remained at 93%. Guessing that the update was corrupt in some way, I erased the phone and restored from scratch. Everything improved for about half a day, then it was back to the 15.2 battery drain. So I bought a new SE 2020 Gen 2.

One possible theory: my iPhone 8 never indicated a firmware update as part of the 15.2 update. But my brand new SE 2020, which came with 15.1, did the firmware update during 15.2 installation via iTunes. And it is working properly with 15.2.

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.

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).

Omg! That graph is atrocious and outrageous 🤣. When my iphone 7 updated from iOS 14.7 to 14.8 it was bad, but not as bad as yours.

it improved after a few full discharge and recharge cycles.

iOS 15 brought back the glorious drain😎

Ok - iPhone 6s, I literally changed out the battery 48hours ago, at an Apple authorized location. This also prompted a iOS scan & then did the download latest version 15.3.1

I have been hashing out my iPhone for over 24hr, looking for the leaks, that are draining things

• till I read that people where all experiencing the drain, did I look at apples software as the culprit. This update iOS is causing my cellphone to
• finish a complete Re charged battery in less than 12hours, taking into account a few calls & texts & trouble shooting steps.
• 
  
• The battery software keeps placing messages ie ( Backgd -6min, under app) example// or (background activity) or under phone icon it says (low signal,audio).
• I have tried to find out where these numbers are coming from.
• I know my iPhone 6 doesn’t have these issues, that’s because it’s iOS us not been updated. I have duplicated actions done on 6s & my iPhone 6 (which has a battery that is not 100%)
• the iPhone 6 leveled out at 77% remaining on charge, & iPhone 6s was 18%. I charged its battery fully before the test & the iPhone 6, I charged 2days ago.

help - can some one roll back the iOS?

side note is that in settings I keep getting this message listed above the settings features.( about being prepared for data transfer to new iPhone)

i have no new phone, & those background messges are under apps that have been closed & deleted & signed out of ie Apple App Store

I'll just post my experience as well. I have an iPhone 7 with a recently replaced battery showing 92% capacity. Since the 15.1 update, I've had draining issues but only with specific applications. Safari is currently the worst offender - I often get a 20-40% drain with 20 minutes of usage or less and it makes the phone run hot. Apple News is a close second with similar drain on the battery. Podcasts are not quite as bad, but still pretty poor considering I need a recharge after 2 hrs of listening. I've turned off notifications, background updates, location services, and the whole host of usual suggestions to no avail. The drain appears to be the same via WiFi or cellular signal. It's the point where I'm charging my phone 3 times a day.

Interestingly, I get no such drain with certain applications. For example, I can stream an hour via AppleTV+ with less than 5% battery change. That makes no sense - Podcasts (audio only) with the screen off will drain 40-50% of my battery in an hour. I can browse on the eBay app with no issue, and something like the Hoopla app for reading books has a similar small affect on the battery. So neither data usage or screen usage seem to be the main culprit.

I've factory reset the phone to no avail. Just to be sure I haven't restored the backup, and I have all heavy-usage iCloud functions off (photo syncing, backup, etc).

I see the suggestion to submit to the issue to Apple, which I will do.

I opened a ticket with Apple Support, and they're monitoring my phone as we speak. I highly recommend you do the same so Apple is aware that this could be a bigger issue.

marnibeanz wrote: "...FIX THIS APPLE!!!"

Tell Apple to fix this here:

iPhone Feedback

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okciii wrote: "Me too. "

okciii ~ Let Apple know here:

iPhone Feedback

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iPhone 12 Pro. I updated 5 days ago and now go from 95% to 3% overnight with no use. Apple News widget is removed. This is worse day to day, not better. I’m going to try resetting Network connections before i try anything else. System is no longer usable for me, but another iPhone X in the house seems to be ok.

1. Iphones are designed to be charged all night every night. Many housekeeping jobs are designed for the phone to be on charge and locked. 20% overnight is not unusual - it is 1/3 of a day after all. Do not leave it off charge overnight.
2. An old battery can self-discharge even at 84% so try this test.

Check iphone battery for self discharge