iOS 11.4 battery drain

Believe this drain is 11.4 big: 1) reported with phones 6a to X, , 2) in my case battery had just been replaced 3) massive drain occurred while attached to charger, 4) my phone had 3/4 hour checkout by Apple support complete with running diagnostics 5) when I followed advice to switch from 5 ghz WiFi to 2.4 at price of 4 fold drop in speed battery behavior much more normal. Does anyone have influence to get Apple to fix bug???

I upgraded both my iPhone 7 and iPad Air 2 to 11.4 earlier this week. My iPhone 7 was fine, but iPad Air 2 suffered from rapid battery drain as mentioned by many others on this discussion thread. I had read comments that suggested it was a 5 GHz related wi-fi bug. I noted my iPhone was on my 2.4 GHz wi-fi network whereas my iPad was on my 5 GHz network. I moved the iPad onto the 2.4 GHz network and battery consumption returned to how it was prior upgrade, i.e. no more rapid battery drain.

The downside of 2.4 GHz wi-fi networks is they are more prone to radio interference in built up areas from neighbouring wi-fi networks, due to more limited frequency band / channels when compared with 5 GHz. This can give rise to intermittent reception problems, especially during the evening as home Internet usage peaks.

I read elsewhere in the discussion thread that some people resolved the battery drain problem by performing a “network reset”. I did this on my iPad and then rejoined it to my 5 GHz wi-fi network, and no more rapid battery drain issues on the 5 GHz network. I have also performed a network reset on iPhone as a precaution.

For me, it feels like a software bug associated with network configuration, but can worked around by performing a network reset.

Hi, exactly the same with my iPhone 7 (BH 89), 6S (BH 87) and iPad. Nothing more than the update to 11.4 and now Battery drops in a couple of hours. it happenned for all devices the day after the bulk update...😠

I understand that you refer to battery life. Since that is the problem, but the cause is known. It is the update of the latest iOS 11.4. We as end users can not fix this.

Trust me. I tried :( can not even return to previous 11.3.1 anymore. :(

I’m having same problem on my 6S I bought this phone 2 years ago I have 83% battery health, before 11.4 it was working nice, no problem with my battery. But after the update it spends between 40%-60% without even touch the phone and on standby mode! That’s annoying!

I only updated my iPhone 6SE with 11.4 two days ago. I noticed yesterday I had to plug it in all day. I took it off charge in the evening and did not use it all night, this morning it was completely drained. I never have to charge my phone more than twice a week (I am only an occasional user). I don't know if this will help narrow this down, but I noticed two things.

1) In Battery, it suggests that the Message app had used 96% of my battery. I checked its settings and noticed iMessage was turned on. I never have that turned on so I turned it off again.

2) My wife had a similar experience for some time with an older iPhone 5. She discovered that after an iOS update her battery was draining by almost 100% in 12 hours when the phone was at home, but not always. When she was out and about the battery never drained more than 5% over 8hrs. She discovered that by turning off 3G data (its an older phone) it solved her problem. The point ism we may have a weaker 3G/4G signal indoors than outdoors and I wonder if changes in iOS is increasing 3G/4G connection attempts that are draining the battery. Since my 11.4 update I noticed that my phone, when at home, keeps swapping between 3G and 4G thus suggesting it is having trouble maintaining a connection and this is draining the battery, even when not in use all night. Prior to the update I always had at least 2 bars of 4G, and the battery would last several days.

I have been through all the usual settings i.e. background app refresh, etc.

I had the same problem with my Iphone 6, drained the battery during the night from 66% to 0%.

I run a 5Ghz Wifi network at home (europe). I changed the connection to my 2.4Ghz network (told the Iphone to forget my 5 network).

Since then the battery is back to my 2 day cycle as it was with 11.3.4.

So there is definately an issue with Wifi in 11.4

Pretty sure this has everything to do with the following: settings —> privacy —> location services —> system services. After I unchecked all of the system services (except find my iPhone), the battery drain stopped completely.

I have a new SE with 11.4 and experiencing unusual battery drain.

My problem is not so much the overnight drain or wifi issue as is just using the phone.

In particular I've noticed a drain while using Safari. In 5 mins of browsing the battery went down by approx. 10%.

I tried this a few times, both with cellular and wifi off or just wifi on.

I had another SE with 11.3 and the battery performance was much better.

Hi, same problem on iphone 6. Battery drains at incredible speed. Charge collapses rapidly from 85%to 60%, it stands at 40% at lot of time. Then collapses again at ~20% in a few secs and again in a bunch of seconds it gets to 1%. Stand at 1% for a while and then it shuts down.

Battery is @93% max capacity.

Sterling,

with all due respect this needs to be addressed. My 6S sits on my desk at work most of the day; connected to the corp wi-fi; all of 15 feet away from my desk to the AP and the phone doesn't see a lot of use, however since the update that battery life has gone from me driving home and debating whether or not to charge before I go to bed to needing to charge before I drive home or my battery will redline.

I'm going to read the other 15 pages of posts but I hope I find somewhere that Apple is at least acknowledging the concerns of the community and of their customers.

I have a 6s+ and my battery will drain from full charge to less than 20% twice a day. I am not really on my phone all that much, and can see it drain 20% in an hour when in sleep mode.

I have tried so many ways to stop the drain, but nothing seems to be working for me. The best things I have found to slow the process is to dim the screen so low that at times you can hardly see what is one the screen. Sort of defeating the purpose of having an iPhone.

My Apple Pay also was messed up with 11.4 upgrade. It was working fine before the update, now I keep getting "invaild pin" "payment rejected" messages.

iOS 12 can not come soon enough with fixes, iOS11 is the Vista of iOS as far as I am concerned.

After updating my 6s to 11.4 and having it fully charged in the morning (7:00), I did not mention battery differences till about 15:00 - it went down to about 60% - as I looked to the phone again at about 17:00 it was down to 14%, not having used it. And I could watch the percentage going down by 3% just typing a text message.

To me It seems Eelco is right.

Wifi 5 GHz could be the issue.

At work on company's network 2.4 GHz Not much drain.

At home at the 5 GHz Wifi I can watch the battery percentage going down.

Network reset did not help..

I had the same problem with my iPad. From 100% to 20% in less than 10 hours standby. I switched it off completely and after a restart it‘s now working perfectly.

Still 90% after 24 hours and some use.