iOS 16.1 Battery Drain

Have anyone started to face battery drain in iPhone 13 after iOS 16.1 update..?

i wasnt facing a battery issue in ios 16.0.3 but today onwards after new update i have experiencing a drastic battery drain


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Posted on Oct 25, 2022 2:29 AM

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Posted on Nov 4, 2022 4:05 AM

This seems to have solved my problems:

https://www.droidwin.com/iphone-calendar-app-excessive-battery-drain-fix/


Numerous users have voiced their concern that the Calendar app is hogging an astronomical amount of battery from their devices. Users have reported that if they check the Battery stats for the past 24 hours, then the Calendar app is sitting right there at the top, running for over 15 hours in the background and around 83 hours in the last 7 days.

Correspondingly, it seems to hog around 40% of the battery which is definitely not what one would expect from an app belonging to this domain. What makes the matter worse is the fact that Calendar isn’t even present under background app refresh, so you cannot disable its background activity as well. With that said, there does exist a nifty workaround that shall help you resolve this bug. So without further ado, let’s check it out.


Nearly all the users who were getting bugged with this issue had one thing in common- they were all using the Apple Watch. Upon further debugging the issue, it turned out the issue is the watchOS. So here’s what you need to do to rectify this bug once and for all.

  1. To begin with, long press the Calendar app and select Re-Arrange App.
  2. After that, tap on the minus icon to remove this app from your device.
  3. Now unpair your Apple Watch from your device.
  4. Then reinstall the Calendar app on your iPhone from the App Store.
  5. Finally, pair your Apple Watch with your device and the issue should be rectified.

That’s it. These were the steps to fix the Calendar app excessive battery drain issue on your iPhone. If you have any queries concerning the aforementioned steps, do let us know in the comments. We will get back to you with a solution at the earliest.

209 replies

Nov 17, 2022 7:08 AM in response to Skywings

So... I am happy to report we have a "Good New/ Bad News" situation... The "Restore" solution from Madz solved the "daytime" battery drain, but Find My continues to hammer the battery overnight (nearly 100% utilization and loss of ~25% total charge). I have switched "my location" to another device (14), and behold -- nearly immediately, my 13Pro stopped draining the battery, and my 14 started... Net/net -- Apple has some "splainig" to do and bugs in Find My (Bluetooth scanning) to quash...


PS: Maybe Apple can "phone the friend?" :)

Nov 26, 2022 3:36 PM in response to Timothy Swan2

I'm not sure, but in case you are using astrology lockscreen in normal focus or in other focus consider changing it to default cause it's drain a massive battery. to be safe you can delete any other wallpaper. Never leave location, bluetooth always on, disable it from setting. Some user suggested turning off icloud for contact. I did turn it off for apple native app like contacts, calendar, reminder, etc.


Also some information in case others don't know never charge <20% and past 90% to extend battery life. Do not believe over charging technology in smartphone. Do not use your phone while charging unless for texting and minor activity to see information in app (instagram, youtube is a no, it's heat the phone). I don't get crazy battery drain but my phone did drain faster and need to charge twice a day even if i don't use it, often times get hot. This last for a week. Doing a factory reset with itunes at first not helping, i wait few days and it's gone (including turning off icloud for contacts and other apple apps). It's normal now, just my psychology playing me cause my older phone is realme with 4300mah and the battery capacity is insane. I could play game for hours, only need to charge it once a day. I can't do that in iphone 14 pro but the experience iphone is offer is outgrow the android. I love it and won't go back. Unless android bested iphone.

Nov 30, 2022 7:43 AM in response to CX-777

My iPhone 13 Pro has lost 45% of its battery in two hours this morning, still excessive battery drain due to Home & Lock Screen using between 50-64% of my battery. Here's what I've done to try to remedy this (nothing has helped):


  • Disabled all lock screen widgets
  • Disabled all home screen widgets
  • Turned off all notifications
  • Turned off all background app refresh
  • Wiped the iPhone and reinstalled from iCloud backup
  • Removed all lock screens and created one with background color and no widgets
  • Turned off all focus modes


I've now spent hours trying to remedy this problem, since Apple's only response was "wipe the iPhone and reload from your iCloud backup", which I had a feeling wouldn't do a **** thing except waste a few hours. I now have a phone that has most of the useful features disabled, and which gives me 4-5 hours of battery use, even when not using it. This is clearly unsustainable. I know that not everyone is having this problem, but it seems that the Home & Lock Screen battery drain issue has been around for years (Google it!) so you'd think Apple would know what was causing it by now.

Nov 30, 2022 8:29 AM in response to Timothy Swan2

My iPhone 13 Pro has lost 45% of its battery in two hours this morning, still excessive battery drain due to Home & Lock Screen using between 50-64% of my battery. Here's what I've done to try to remedy this (nothing has helped):


  • Disabled all lock screen widgets
  • Disabled all home screen widgets
  • Turned off all notifications
  • Turned off all background app refresh
  • Wiped the iPhone and reinstalled from iCloud backup
  • Removed all lock screens and created one with background color and no widgets
  • Turned off all focus modes


I've now spent hours trying to remedy this problem, since Apple's only response was "wipe the iPhone and reload from your iCloud backup", which I had a feeling wouldn't do a **** thing except waste a few hours. I now have a phone that has most of the useful features disabled, and which gives me 4-5 hours of battery use, even when not using it. This is clearly unsustainable. I know that not everyone is having this problem, but it seems that the Home & Lock Screen battery drain issue has been around for years (Google it!) so you'd think Apple would know what was causing it by now.

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iOS 16.1 Battery Drain

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