iOS 11.4 battery = disaster! Handoff is culprit?

++++ iOS 11.4 Battery drain problem SOLVED ++++

Here is the easy fix that worked perfect for me on my iPhone 6s. The battery drain issue is related to wi-fi on the 5Ghz band. You can either stop connecting to the 5G band manually (by forgetting your network and thus the password) or just select non 5G networks. The best solution though is to reset your iPhone network settings by : Settings > General > Reset > Reset Network Settings.

You will need to select your wi-fi networks again and enter the password one time.

After doing the Network Setting reset yesterday evening, my phone battery drain is back to normal on both 2.4G and 5G wi-fi connections. Others have reported similar results. Try it !!!

i tried all the suggestions above and much more, without success.

Wifi: Off

Cellular data: Off

Bluetooth: Off

Location Services: Off

Handoff: Off

Background App Refresh: Off

Siri: Off

Network settings : Reset

Low Power Mode: Always On

The most used app in the past 2 days: Safari 38% (24 min on display)

I tested ios 12, changed my old battery with a new one, full reset and testing, full reset and backup from icloud, no difference.

Hi, I have iPhone 6s, my battery life has been reduced by ~50% with iOS 11.4

! Without any change in my usage pattern.

My battery health is 96% (device is just 6+ months old). I used to get from 100% down to a single digit in a day+ (30-35 hours) with iOS 11.3.1, now it takes 15-16 hours! And my daily usage pattern hasn't changed a bit. It started immediately after installing 11.4 two days ago (official version, I do not install betas).

I suspect handoff between iPhone and my Mac is the main culprit. Today took my phone off the charger in the morning at 100%. After 11 hours at work and commute (no handoff there) I was at 65%-70% when I got home. After 2 hours at home, working mainly on my Mac (very little on the phone itself), I was down to 50%. After 3 more hours (again, barely touching the phone), down to 7%. What is that???!!!

I am sorry, but this is a huge FAIL. This software "upgrade" has downgraded my battery life by 50% or so. It is unacceptable. Give me back iOS 11.3.x!

I have the same problems, I like iphone 6s like hardware, but I start to hate softwere : so what I need to keep with me all time power station? I start to used LG G5 its work one day and half. Android stay better like IOS . its shame developers from Apple. Sallary and price its big, but quality and results are cheap

iOS 7.0 is probably one of the most hated changes that appeared here and it was initially hard on my battery.

Something is impacting your battery, go to Settings > Battery and see which processes/apps are consuming most of your battery.

And Apple isn't here.

I think you may be on to something. I just installed a bunch of smarthome apps and to get all of the functionality, I had to add my address to the apps and my contact profile. Since then battery has been draining like crazy. I took the phone in and was told the battery was fine. I've done all the little tips and tricks to extend battery life and nothing has helped. I just deleted my address info in the phone. Curious if that will make a difference.

So you basically had to make your device close to useless to save the battery. I did the same thing. I looked at all of the analyticis, competely reset it (to factory settings), turned everything off and the problem is still there.

The battery status on my iPad says it’s 100%. When I unplug it,it shuts down. It has to be plugged in to start. Apple told me to take it in.

iOS cannot be downgraded. Sorry.

https://support.apple.com/en-us/HT208387

https://www.apple.com/batteries/maximizing-performance/

I definitely hope this gets fixed.

2 days in a row now. Phone charged till 100% around noon, dies over night.

6s plus that used to have excellent battery life before.

I have the same issue. iPhone 6s updated 2 days ago.

iOS can be downgraded as long as Apple is still signing the release. See here for instructions:

Solved all our iPhones battery drain issues.

Update : ios 11.4.1 beta did not solve the problem.

Might try a restore anyway, although all was just fine until I installed 11.4

Update : It's fixed after a complete wipe /restore. Still on 11.4.1 beta.

The exact root cause is still a mystery to me, all I know is that the 11.4 upgrade triggered it.

I got the same in iOS 12 beta. It only helps to turn connectivity of going into dumb mode