iOS 11.4 battery drain

I too have an iPhone 6S and have exactly the same issue after iOS 11.4 update. The drainage seems to be the worst during night time when I am asleep. Judging from the posts here, this seems to be affecting mostly iPhone 6S and 6S plus. Hope they find a fix soon.

The battery draining issue on my iphone 6s stopped for 2 days then it happened again last night. I charged it up to 100% before going to bed, closed all the apps running in the background, and let the phone in stand by for 12 hours, in the morning, my battery reading is 10%. I just changed my battery couple months ago, and had been following all the suggestions to overcome this issue, the problem seems in the ios 11.4. Hope Apple will fix this soon.

I have been noticing the same rapid battery drain problems on my iPad Air 2 after 11.4 upgrade, but not my iPhone 7. Following reading your entry, I noted that my iPad was on my 5 GHz wi-fi network whereas my iPhone is on my 2.4 GHz network. I have now swapped my iPad over to 2.4 GHz network and battery performance has significantly improved. Does seem like a wi-fi iOS related software bug, unless they have decided to push more power to the 5 GHz radio to improve reception range.

I have an iPhone X, after installing iOS 11.4 my battery starting draining 2 to 3 times faster than before. I tried everything possible for a week to fix this. Nothing worked.

So I had an appointment at Genius Bar yesterday. Some of the Apple store employees themselves experienced the same issue on their iPhone X. They had no solution whatsoever. They replaced my iPhone X hoping that after restoring my stuff the battery issue would be solved. But we agreed that it wouldn't necessarily work.

Turns out, it did work! My new iPhone X's running iOS 11.4 and the battery works as perfectly well.

So if you're phone is still under warranty, just have it replaced.

I know. My point is basically there is no way around that issue. Apple must fix it ASAP. But the iOS 11.4.1 beta 1 that came out for developers the day after the release of 11.4 hasn't been followed up by a beta 2, which is worrying.

It seems Apple doesn't seem to working on a fix for the battery issue and people will have to wait until iOS 12. Which is BS if you ask me!

I have the iPhone 6 Plus and immediately after updating to iOS 11.4, the battery started draining at an incredible pace. I've worked with Apple phone support several times this week and completed everything they've instructed me to do.

I just ended another support call with Apple (June 9, 2018 9:08 AM EDT). All they could suggest is replace the battery or buy a new phone. I told her that replacing the battery wouldn't help as the OS update seems to be the problem. She did a diagnostics on my phone and said the battery is in good health!

I have seen many posts about this situation so I know I am not the only user affected.

Replacing the battery is useless. I am a light user, and prior to 11.4, at the end of the day I usually had about 70% battery life left, and I normally charged every 2 days. Immediately after upgrading to 11.4, at the end of the day I had 20%. I tried all the suggestions mentioned here to no avail. My wife's SE showed the same behavior after upgrade

I was lucky and was able to restore back to 11.3.1, Immediately, I returned to the 70% number, and my wife's phone was fixed as well.

We have 2 iPads, neither have this issue with 11.4.

Most phones appear not to have problems with 11.4, but as no one knows the root cause, there is no way to predict if a phone will be impacted, and now, no way to go back to 11.3.1 if it is.

In my opinion, there is no benefit to 11.4 worth the gamble of such a severe battery drain.

It seems wifi related for me. Turning off Wifi Location services seemed to help but I’ll need to test some more. None of my devices drain as fast when away from wifi...so whatever Apple is doing differently in 11.4 involving Wifi...that’s the issue.

In my case, turning off "Cell data" before going to bed solved the problem of battery draining that only occurred while I slept. I think this is a bug that seems very reproducible affecting mostly iPhone 6S/6S plus users. Hope this can solve your problem too while we wait for Apple to find a permeant fix.

It is suspicious when Apple shows a new way of improving UI performance during the WWDC Keynote which basically works by raising CPU frequency and power much quicker and releasing it also quicker and Apple devices around the world having huge problems with a significant battery drain "over night".

If I would be a Aluhat wearing guy I would come to the conclusion that Apple has a "covered beta program" which tests new code and tweaks at time periods where they guess that users recharge their device while sleeping.

Yet there's no evidence for that. On the other hand has Apple introduced vulnerable features more than once in covered ways - like the new filesystem or (more harmful) the throttling on devices with older batteries.

For me there's little chance that a minor step in the OS passes all quality gates, all stress testing, all beta testing without showing up what we see right now. Therefore it must be some kind of a super weird bug, a wrong compiler switch or it might be a covered test program by Apple to collect telemetry and play with different flavours or configurations of the new code base...

Yet I'm in doubt that the observed effects are normal or random... There's a clear pattern...

I'm also very disgusted. Having an iPhone 6S Plus which works almost fine get's rendered to useless electro waste after the update. Over night it loses 60% to 80% of battery charge (before the update it was between 2% and 3%). Over day I have to replug it latest after 4 to 5 hours. Before the update it survived up to 2 days.

Based on this experience and the observable "getting worse" trend in iOS from a UX perspective and yet from treatment of existing customers, it will be really hard for Apple to convince me once more to pay for a new iPhone. Yet Android seems to become a bit less annoying compared to experiences since the last few iOS updates. Really. And this makes me sad...

This battery drain issue is once more a cherry on top of the cream topping of annoyances... I'm really disappointed... :-(

It's yet time for Apple to explain users what happens and to fix the problem quickest possible...

Yep I having same issues.. actually.. normally iPhone can make one day without any issues... last week I am charging phone 3 times per day.

And if I left phone with 85% battery for like 7 hours (during bed time) then it has 5% :-)

I'd like to point out that it's not just a iPhone 6S/6S Plus problem. The iPhone X seems also to be affecetd. Today I tested the battery drain on my X:

8:30 AM: 100%

6:30 PM: 57%

My phone was on stand by all the time and was connected to my WiFi hat home (5 GHz). The only thing I did was to open the Contol Center 3-4 times to check battery drain by swiping from the top of the display.

Befor updating to 11.4 there was not such a massive battery drain within a few hours.

Agreed. My iPad Mini is showing the same issue. I think it’s better if I have Wifi location services off but it still seems to drain way too fast when on wifi and idle. Turning off location services is not a real solution. This is definitely an iOS bug.

APPLE NEED TO FIX THIS ASAP!!!!

I have an iPhone approx 1 year old. Was working perfectly with battery at 98% capacity. After upgrading to 11.4 it doesn’t last for more than 2 HOURS!!!! It also lags and freezes!!! FIX THIS NOW APPLE!!!!!

APPLE NEED TO FIX THIS ASAP!!!!

I have an iPhone approx 1 year old. Was working perfectly with battery at 98% capacity. After upgrading to 11.4 it doesn’t last for more than 2 HOURS!!!! It also lags and freezes!!! FIX THIS NOW APPLE!!!!!