iOS 12 is eating my battery!!!

famoussasjohn

macrumors 6502a
Jul 7, 2010
748
8
Overall I feel my battery life is about the same, if not better. Have you checked your battery usage and see what's eating it up? It gives a better indicator on what's using your battery and when.
 
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TinaBelcher

macrumors 6502a
Original poster
Jul 23, 2017
696
337
Overall I feel my battery life is about the same, if not better. Have you checked your battery usage and see what's eating it up? It gives a better indicator on what's using your battery and when.
Messenger 20% and the rest is from 6-2%
 
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Freakonomics101

macrumors 68030
Nov 6, 2014
2,604
1,677
Beta 12/GM/Public Release has been great for me with daily battery life on my iPhone 10, iPhone SE and iPad Pro Wi-Fi + Cellular 10.5.
 

joeblow7777

macrumors 603
Sep 7, 2010
6,163
7,188
On my 6th gen iPad and iPhone 8 Plus battery life seems to be the same or perhaps slightly better than it was on 11.4. Certainly no worse.
[doublepost=1537312801][/doublepost]
My iPhone 8 dropped overnight from 98 to 54 percent. Never before have I experienced such a huge battery drain. I'll give it one more more day or two and report my results.
Something is wrong there. It should take days if not WEEKS of standby to drain that much!
 
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jbizzybeetle

macrumors 6502a
Mar 9, 2015
501
195
overnight into morning use the iPX seems to have drained like a sieve.

I then charged wirelessly for couple hours and rest of day reflects more typical reduction with use.
 

CalmEnvy

macrumors 6502a
Feb 9, 2008
535
27
Hmm I have an 8 Plus, currently 50% remaining and it’s been off the charger since 5:45am. Bluetooth is always on as I have an Apple Watch and use my AirPods on the bus/train to and from work. Gotta say I’m getting great battery life so far.
 

Perene

macrumors 6502a
Jun 29, 2015
835
320
Netherealm
Do the following:

- Reset the device to factory settings.

- Don't restore from iCloud or a backup stored in your computer.

- Update the device with iOS 12.

- Download all apps from your Apple ID account and reconfigure everything. From scratch.

If I am not mistaken I read multiple times this is the best way to do any update... and make sure these battery issues are from the iOS version, not the device.

P.S. reasons why a clean install is better:
https://medium.com/@imkenny/how-to-fix-your-battery-life-after-updating-to-ios-11-8196ce0c95dc
 
Last edited:

intamin

macrumors newbie
Nov 20, 2012
16
1
3 hours based on what?
What do you mean based on what? 100% - 0% in 3 hours after upgrading. Normal usage, maybe a smidge extra GPS loads but never keeping it on, just to see the new apps.

Usually get 4.5-5.
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
48,515
17,175
What do you mean based on what? 100% - 0% in 3 hours after upgrading. Normal usage, maybe a smidge extra GPS loads but never keeping it on, just to see the new apps.

Usually get 4.5-5.
So as in, for example, 100% at 8 AM and then 0% at 11 AM?
 

C DM

macrumors Sandy Bridge
Oct 17, 2011
48,515
17,175
No, lol, 3 hours of screen time. It's what we're all talking about. :)
Well, that's kind of why I was asking. But how are you telling that given that in iOS 12 it doesn't really tell you screen time or even standby time since last charge anymore?
 
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bleak7

macrumors member
Sep 17, 2018
64
100
If this is related to the 11.4 battery drain that people experienced back when it came out (myself included), then what you can do is try to re-install the phone directly into iOS 12 with DFU mode. It fixed my issue when everything else wouldn't.
 
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pkts

macrumors member
Jun 29, 2007
96
9
Also experiencing worse battery life since updating from 10 to 12 on my SE. My 6 has had no such issues. All the more odd since my SE was the one with amazing battery life. Weirdest part is that the battery percentage drops in batches. It'll be a 50% and then drop to 48 or 47% while I'm looking at it (not doing anything major, not using GPS or watching a video). I've been through plenty of updates and never seen this before.

When I did the update, I was charging but the battery percentage still dropped 10% and the SE was REALLY hot after. Battery health at 90%
 
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iOZZY

macrumors regular
Mar 17, 2013
114
31
Stamford, England
Also experiencing worse battery life since updating from 10 to 12 on my SE. My 6 has had no such issues. All the more odd since my SE was the one with amazing battery life. Weirdest part is that the battery percentage drops in batches. It'll be a 50% and then drop to 48 or 47% while I'm looking at it (not doing anything major, not using GPS or watching a video). I've been through plenty of updates and never seen this before.

When I did the update, I was charging but the battery percentage still dropped 10% and the SE was REALLY hot after. Battery health at 90%
My SE is doing the same. 100% battery health.
 

Sid91

macrumors newbie
Sep 19, 2018
10
0
Same thing has been happening with me, iPhone 7's battery went down from 60 to 0% overnight and drops 1% per 30 seconds while using it, this **** completely ate my battery life. Battery health at 86% BTW....
 
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