Is anyone experiencing battery drain since updating to iOS 15.2? If so, any tips for what to do about it? I just updated this morning. Thanks!
iPhone 12 Pro Max
As posted in the 15.1 battery drain thread, some of the fixes that I found might help with 15.2 as well. I'm talking about drain that persists for more than the 1-3 days after an update while Spotlight is indexing. I had my iPhone 13 Pro Max and iPad Mini 6 BOTH draining enough to run dry in 20 hours of standby, and fixed it completely, so I'm still on 15.1 with no issues..
1) Turn off Apple News Widget on your Home Screen if you have it configured. I had seen that Apple News was using a lot of battery in "Settings > Battery" and I wasn't using it. Turning off background app refresh made no difference in battery use and drain in the background. Then I discovered the widget hiding on the screen to the left of the Home Screen that has my app icons, and turned it off. That reduced my drain from 5-7% per hour to only 3-5% per hour. I also turned off most of the other widgets except Calendar, Reminders, and Battery level for bluetooth accessories (watch, and AirPods).
2) I had my iPhone 13 Pro Max and iPad Mini 6 paired with my iMac and MacBook 16", and had "show this iPad/iPhone when connected with WiFi" turned on. I "Reset Network Settings" which broke this pairing, and COMPLETELY solved my battery drain issue. I was later able to plug my devices back into my iMac and pair/Trust them, but I made sure to turn OFF "show this iPad/iPhone when connected with WiFi" when I Trusted them, and the drain has not come back.
Apparently the WiFi network connection between iDevice and Macintosh computer maybe has the iDevice phoning home continuously in 15.1, even when you are not on the home, and this system resource is still draining the battery regardless of low power mode or not. But my best guess is that when the iDevice is NOT looking out for the computer constantly, with "show this device on wifi", then the drain goes away completely FOR ME. This might not be your problem.
Siri has been responsible for 30-50% of my battery drain since updating to 15.2 two weeks ago. I had to disable Hey Siri to fix it. Hopefully Apple is aware of this and working on a fix.
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.
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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Bootloop1 wrote: "My iPhone 7 battery’s draining really fast."
Bootloop1 ~ With an older iPhone model such as the 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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iPhoneInRio wrote: "WTH Apple?!?! Please fix ASAP with another update!!"
iPhoneInRio ~ Although Apple administers these communities, that doesn't include reading each of thousands of daily posts for possible feedback. However, Apple will "read all feedback carefully" here:
iOS 15.3 was released yesterday – see if that fixes it.
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Turn off your App Privacy Report under Settings -> Privacy. Apple needs to fix this bug, cheers.
This is when “reset network settings” might help.
Just make sure that you know your important Wi-Fi passwords before you do this, and know that you will need to re-enter your customized iPhone name if you had one by going to at “settings > general > about”
It always renames your iPhone from something like “iPhone 12 Pro Max” to “iPhone”.
An additional step for people who do actually sync to a computer is to NOT turn on Wi-Fi syncing when you re-pair with your Mac.
@jackv3
i’m so sorry that RESET NETWORK SETTINGS is not working for everybody. I know that every time I did that my battery life went back to normal. But if I plugged into my computer, clicked “trust“, and allowed my iPhone or iPad to be seen on the computer while connected over Wi-Fi then the drain came back with a vengeance. If I did NOT let it be seen when connected by Wi-Fi the drain did not return.
I HAVE NOT HAD BATTERY DRAIN SINCE DECEMBER 18 2021 on either my iPhone 13 Pro Max or iPad Mini 6, 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.
I could assume that since the problem started with 15.1, and I found a solution for my phone and iPad, that same solution would work with 15.2 - but I don’t want to take any chances.
I can now use the heck out of my phone all day, and go to bed with 30% to 45% battery charge remaining after a good 8 to 9 hours of solid “screen on” use during a 13-16 hour day off the charger. Now, when I read reviews of the 13 Pro Max it seems like it should be even better, but this battery life beats my old 11 Pro Max by a good margin.
Yesterday I unplugged about 10AM and had over 10.5 hours of heavy “screen on” use by 2AM when I went to bed with 28% charge remaining. My iPad does still use about 20% charge per day in standby without touching it - it should last in standby longer than that. I can use it heavily for 8-9 hours on other days and use up 2/3 of the battery = similar usage drain to my iPhone 13 Pro Max.
_Cartwright_ wrote: "Weird experience with my 6s today... "
_Cartwright_ ~ With an older iPhone model such as the 6s, it's worth checking the battery...
Does your iPhone 6s still have its original battery?
And what's the Maximum Capacity % here?...
Settings > Battery > Battery Health
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As one who complained about the battery drain which was off the scale compared to anything previous, I can say it settled down after a day. I did however change many settings to reduce power , such as apps auto updating, location etc. But i suspect that after a IOS update there are a number of housekeeping tasks with the apps to clear up, especially as it appears to include some regulatory changes to the apps, which then require a user input.
@raffeph I’m sorry to hear that. I’ve heard that “reset network settings” can still help even if you are not paired to a computer for sync and backup.
I have had my iPhone 13 Pro Max unplugged for over 12 hours (about 10:30AM), and used my GPS on battery for two 20+ minute driving trips (42 min GPS screen on), WITH 5 hours of screen on use total today + 4 hours screen off use since unplugged AND I AM AT 58% BATTERY at 10:50pm.
I WOULD SAY I’M100% fixed.
Mabouya-v wrote: "I do not appreciate the fact that my battery percentage on my iPhone keeps dropping dramatically."
Mabouya-v ~ What model and iOS version?...
Settings > General > About > Model Name
Settings > General > About > Software Version
And what's the Maximum Capacity % here?...
Settings > Battery > Battery Health
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oldtimer2021 wrote: "the phone is 4 years old. the battery charge capacity has dropped to 83% no message from Apple..."
oldtimer ~ 83% isn't healthy and, being 4 years–old, your iPhone 7 may refuse to start up in the coming months or year. If you'd prefer to avoid that possible situation, have the battery replaced sooner rather than later:
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It is off, and was never turned on.
From my observation so far I conclude that there's some kind of bug somewhere in the "lower layer" of iOS code responsible for iCloud synchronization. It affects people in different ways, and (what's much worse) it happens randomly. That's why there are so different opinions in this thread about possible causes of battery drain (but most of them connected somehow with data exchange between devices connected to same AppleId).
Bugs such as memory leak behave in this way and are very hard to diagnose and fix. I for one, have now two iPhones with identical configuration - SE (1st gen) and 12 mini. Smaller one consumed close to 0% of battery last 8 hours, second - with much bigger battery - about 15%! That's crazy. I'll still try to "play" with different settings, but I think there's nothing left (as always with closed source code) but to count on Apple for the problem to be solved in one of next releases.
LOST257 wrote: "i am facing battery draining issue on my iphone 7 plus pls fix it thanks"
LOST257 ~ 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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iOS 15.2 Battery Drain
