iOS 11.4 battery drain

Have you tried a hard reset of your iPhone 6/6S by holding down both the Home and sleep/wake buttons until your iPhone goes to black and restarts with Apple logo, then release the buttons?

How much free data storage space is left on your iPhone?

iDevices need to always maintain, at the very least, between 2-3 GBs, OR GREATER, of free data storage space.

In Settings app, under General settings, Reset panel, at the right bottom of the list, Reset All Settings.

In Settings App, Battery, check to see if any apps/processes are eating up your battery.

In Settings App, General,Reset, Reset Network Settings, try resetting your network settings.

In Settings app, General settings panel, turn OFF Background App Refresh for any apps you feel do not need constant data updating/Internet updating in the background when not using the an app OR turn OFF Background App Refresh entirely/globally for the entire device.

Do the same in the Settings app under Notifications.Turn off notifications for apps you do not think you need notifications for and/or edit the different ways you receive notifications to help with performance by not always using all the notification methods together.

In Settings app under Mail, you may want to set a longer fetch time or set your iOS Mail app to only manually fetch your mail ONLY when you launch the iOS Mail app.

In Settings app (NOT from the iOS Control Panel) turn OFF Bluetooth when not using any Bluetooth devices.

Also, in general, if you want a faster IDevice, on all of my iDevices, I turn off most of the iOS motion graphics eye candy, by simply turning ON Reduce Motion in Settings app, General, Accessibilty settings.

Make sure you aren't running 30 -50 OR EVEN MORE background apps in the iOS 11 Control Panel/App Switcher.

If you are, you need to quit the bulk of these background running apps by tap and hold a finger on an app window in the switcher and slide your finger upwards to quit an app. You should be able to use more than one finger to quit more than one app window simultaneously.

Also, make sure you don’t have 20-50 OR A WHOLE LOT MORE of active website tabs running in the web browser.

If you do, greatly reduce the amount of active website tabs your web browser.

Some minority of user have been turning ON and leaving ON iCloud backups continuously backing up on a constant and daily basis.

If you are one of these users, in Settings App, tap your Apple ID, then tap iCloud, then find iCloud backup and turn off iCloud backup and only turn this on to do daily backups either when you are not using your iPhone for a prolonged period of time (like when you are sleeping), then turn iCloud backups OFF when actually using your iPhone.

OR

Only perform your backups on a lesser time schedule.( like twice a week, once a week, once every two weeks, once a month, etc.).

Any large amount of background running apps or active processes that have to constantly go out to the Web to fetch data ALL THE TIME is going to slow down ANY iDevice and can, also, negatively impact battery life.

In addition to all of the possible fixes and solutions presented, another iPhone 6S user, in another single posting in the iPhone support communities, suggested to go into Settings, General, Accessibility, Increase Contrast and turn ON Reduce Transparency.

Your iPhone 6/6S won’t look as pretty, but that user reported that his iPhone 6/6S speed improved considerably.

If none of this, so far, has helped your iPhone 6,/6S,

What about doing a complete backup to iCloud or iTunes on a computer, then do a complete erase and reset as new in the Settings app under General, Reset then restore your backup from iCloud or iTunes?

If still no joy after the erase and restore, hammer Apple with constant feedback about the iPhone 6/6S issues here.

iPhone Feedback

http://www.apple.com/feedback/iphone.html

This is THE ONLY avenue to get Apple’s DIRECT attention to any and all iPhone 6 issues!

IF no one continues to post regular feedback about iPhone 6/6S issues, Apple will NEVER know there is an issue and will never correct it!

Cognizant Apple employees read ALL feedback generated from all of the various feedback pages and transfers the data to the appropriate Apple personnel , but NO Apple employees will ever respond with any type of direct, individual replies from the feedback you post.

Good Luck to You!

No te pasa a ti sólo, después de la actualización a iOS 11.4 a mí y a todos los usuarios de iPhone 6, 7 y 8 que conozco les dura la batería la mitad.

Yo sustitui mi batería con un 83% de salud por una nueva en una tienda de Apple y ahora con 100% de salud me sigue pasando lo mismo.

Después de restaurar el teléfono varias veces y configurarlo como iPhone nuevo, sigue igual.

Tras varias pruebas de configuración me di cuenta que desactivando el wifi la batería vuelve a durar lo normal.

Pero si activas el wifi y te conectas a una red wifi la batería vuelve a durar la mitad.

Actualmente tengo que tener el wifi desactivado constantemente para que la duración de la batería sea normal con el consiguiente gasto de datos adicional.

Es muy frustrante

This battery drain problem is to do with Bluetooth and Cellular access and directly associated with the following;

Bluetooth audio to my car - 87% of the battery usage and I didn't use bluetooth audio at all, I listen to the radio. Battery went from 100% to 21% just sitting on my desk that night.

Bluetooth is not disconnecting from the car and continues to search for it, once connected! I didn't use my car for two days and all was good for the battery. Then I used the car so the phone connects to the audio system and never wants to let go!

The other problem is with CarPlay and it's apps, like Maps, Car Parking location, syncing contacts etc which require the Cellular side of things, the software is obviously set to search continually.

The point is that this is NOT a wifi issue and only happens to devices that have cellular access. My wifi only iPads do not have this issue and they are running 11.4

The workaround is to turn off Bluetooth at night or if you want to be more brutal, put the phone in Airplane mode.

I have SE iPhone and problem started with Bluetooth pairing to car!

Battery drain overnight from 100% to zero.

I have turned off Bluetooth. Stopped drain.

Re-enable Bluetooth, turned off, sync contacts etc, disabled CarPlay, now have selected "Forget Device" from Bluetooth settings.

I only get the battery drain after using the phone in my car, charge the battery to 100%, turn charger off at night and voila, flat battery this morning again!

Something to do with Bluetooth and my car audio system. Seems to never release from the car and keep searching for it!

i got the tip to reset network settings and dont use 5Ghz but use the 2.4Ghz.

i did this and my phone used only 2% battery during the night when sleeping. two nights before it dyed during the night with 65% when i went to bed.

i hope this fixed the problem but i will monitor it for some days before i conclude it is fixed.

Add me to list of people having serious battery drain issues. Charge at 100% at 10pm. By 6 am phone at zero charge, won’t power on until hooked up to charger. battery health at 94% so the battery is okay. After reading multiple threads, I turned off Wifi at night, battery only lost about 5% overnight. consistent results over last 3 days.

Apple- FIX THIS please. Argh.

jtconte wrote:

Same issue here. My 6s is 2 years old and now drains completely in less than a day with very little usage. Can't be good for the battery. If the battery was good, it won't be for long.

Not sure it's worth getting Apple to replace the battery for $29 if the iOS is just going to drain it anyway.

Your problem is not iOS 11.4. Your problem is an old battery. If your battery is two years old, it's quite likely it needs to be replaced. A battery that old is not going to hold a charge the way a newer one would.

Could you go to settings, battery and look at your battery usage?

The cause of your battery drain can be listed here!

In my case, I am having some dramas that are not Apple's problem. My battery usage states that over the last 24hrs my phone has been busy trying to look for a stronger cell tower signal. The towers in my area are being upgraded so my phone is reporting 75% of the battery usage is "Low Signal".

My other direct causes has been everything to do with CarPlay and hands free stuff where the phone connects but will not stop searching for the car and flattens the battery. This is Apple's problem as I have other Bluetooth headphones, speakers etc and these do not cause issues.

Let me know what you find!

I was looking at the NEW inclusions in IOS 11.4 and one of them is iCloud Messages!

iCloud now stores EVERY message in the cloud so I guess for people that message a lot, that every message on your phone is now being uploaded to iCloud!

Read this article from Apple: Keep all your messages in iCloud - Apple Support

I turned off everything in iCloud settings except for find my phone, I left Bluetooth and Wifi enabled and charged my phone to 100%. This morning my phone was at 99%!

So, is iCloud messages the elephant in the room, flattening batteries everywhere by uploading all messages and images in the messages to iCloud?

Mine is related to WiFi. And a poster earlier in this thread fixed his by using 2.4 Ghz WiFi. Which worked for me.

I do, thank you, know how to use my phone. Had them for years. No I don’t have messages to the cloud. Never have. Never will. Of course I back it up. But those questions are moot as my battery is WiFi related. Or. How it is interacting with the 5ghz band. And temporarily solved.

Have a great day.

This response is to everyone with the problem!

I found that my phone had been draining to 13% or thereabouts over the last 3 days from 100% and had been stable for a week or so since I disabled Bluetooth and removed my car from Carplay settings etc.

I used my car 3 days ago and the next day and this morning has reflected the fact that every time that I use my car, my battery is flat the next morning.

I have tried to tell people to look at the way that they are using their phones and was convinced that the problem was with Bluetooth and Carplay (in my case) and it's associated apps such as audio! I was dumb founded to find that the problem is Carplay audio, but it is with both Bluetooth and USB, so any connection between the phone and CarPlay is flattening my battery everytime that I use my car because, once connected to the car, it won't stop looking for it!

My battery usage over the period has also told me that 93% of my battery usage is AUDIO and I don't play audio from my phone. There are no indications of background apps open either so how the **** are we to rectify this issue?

There has been many reports of flat batteries and CarPlay going back 2-3 years with no answer! Seems like 11.4 exacerbated the issue but don't forget that messages to the cloud was implemented in 11.4 so for those that text and mms a lot are having their batteries flattened by ALL of their messages being uploaded to the cloud! You can disable this function in your iCloud settings.

Please check your Battery usage reports!

I hope this report helps some of you with this issue!

In addition, I am on the beta test team and use my iPad. It is running IOS12.0 beta 2 without any issues but it doesn't go near my car!

My wife's iPad was on 11.4 and have upgraded to 11.4.1. She had no issues with 11.4.

My phone is a 5SE.

its now been 3 weeks since i started to use the 2.4ghz instead of the 5ghz net and the phones battery has been normal... no problems with battery drain.

I downloaded iOS 11.4 again from the website people have been suggested. The numbers or code next to that version seems different. It was the only one signed by Apple. I then had to start from scratch and restore it from backup. This seems to have fixed the issue. It sounds like a pain, I’m glad I did it.

Since my earlier append I left my 6S connected to a battery-powered charger overnight and since then it's been back to normal. I'm wondering if the charge level indicator was showing 100% somewhat before charging was complete and an extended charge pushed it back to normal?

I think different devices are affected in different manners. The battery drain of my iPhone 6s was definitely helped by switching the wifi from 5G to 2.4G, even with my bluetooth on. My cellular iPad Mini2 is unaffected by being on 5G.