iPhone 6S Battery Drain IOS 12

Note that for the first 24 hours or so after an install your device will use battery at a higher rate as it needs to rebuild various internal databases.

Where do the new battery statistics show your power is being used?

It seems that a software glitch may cause this sudden battery drain. iOS 12 Restore can help you on this.

http://www.shudhtech.com/2018/12/iphone-6s-battery-draining-fast-iOS-12-1.html

Did restore and setup from scratch yesterday to test and now it seems to go better :-P

Thank you!

Thanks, it seems this has done the trick, it is half a day through and my battery is still 85% full. Somehow the "Background App Refresh" was ON for almost all my apps after the install of IOs12. And before the IOs12 I never knew or used this function.

I am wondering if completely wiping out the iphone (DFU restore) and then not restoring a backup but setting the phone as « new iphone » and then reinstall every app would help. Maybe something in the backup is messing with ios12??

Did someone try this?

I also think that replacing my battery will not help because it is at 89% which is good. But for 40$ I am willing to try. But if it does not help, il will be the last $$ I spend in an apple store.

I believe my son sorted out the problem by doing a hard reboot but I agree. People are going to get fed up. I just upgraded my phone and had some issues with that. Also not a fan of facial recognition. It doesn’t work with he hill with ski goggles on of course and when it’s flat on my desk at the office. I’m punching in my passcode more than ever now. Plus the first XR I received, stopped working after a few days and needed to be replaced. I expect more from apple . Have been loyal since the Mac Classic days! Ugh

Seems to be longer than 24 hours if that is the case.

Now my third day on ios12 and my 6s is still shockingly bad on power use. Unplugged it to drive to work and 11 minutes later with no use it is down to 95%. Just sitting on my desk it is flat within a few hours, quicker if I receive a call. Now have to carry the charger with me and plug in at every opportunity.

Greetings, me too upgraded my Iphone 6s to IOs12 a week ago. The baterry drain increased significantly. Now I am all day on Low Power Mode only checking email couple times, reading couple newspaper articles and barely making until evening 6pm. Then I need to plug the phone. Just a week ago I could go all day without charge using maps, reading stuff, googling and still had 50% before putting the phone to charge for the night.

I have an iphone 6s which has lost 40% of it's charge in 3 hours with hardly any use.

Background app refresh is off. This phone had better battery usage than my iphone 7 before upgrading to ios 12 but now the 7 is much better than the 6s despite having been used more (still at 90%)

There is definitely a problem with ios 12 and the 6s, absolutely no doubt about it!!!!

I have an iPhone 6S on iOS 12, and it lost all of its charge in a short period in the middle of the night while I was not using it.

Most of the activity was attributed to mail background activity. Push is disabled, and mail fetch is set to every 30 minutes.

It seems to be "learning" something because my battery life is slightly better. I unplug the phone in the morning with about 95-100% and plug it in at night with 10-20% now. I used to charge it twice a day right after the update. Still much worse than before when I could easily use my phone for almost 2 days! Apple seems to ignore this issue and wants to force us to upgrade. I will attempt to change my battery soon because it says that the "battery health" is 80% (it was like that before the update too). I'll get back if anyone's interested if that helps...

I have a brand new 6s and a 6mth old regular 6. (Work phone). Both updated to ios12. And right off the bat I found a significant battery drain. I let it go for a few weeks to let the batteries “learn” or whatever. But it’s been over a month and they start 100% at 7am and with regular use they’re down to 20% by 4pm. Sometimes lower if I get phone calls

After the issue seemed to get better for me, yesterday the battery started dropping back again.. Me too I can watch percentage drop by almost 10% in a matter of minutes sometimes, while surfing on safari only on wifi...

And you guys saying that the issue is still there after changing the battery doesn’t give much hope since we are already on ios12.1, so apple should have fixed the issue already if it was their intention.

Just fyi, I replaced my battery this past summer under the very program you described and still suffer from the same rapid battery draining issue after the update. If you haven’t updated to iOS12 yet, I’d be hesitant to do so.