iOS 11.4 battery drain

I have a iPhone 7 and a 7 plus. The 7 has a three month old battery exchanged at the apple store, the 7plus is less than a year old. After downloading 11.4 both phones only hold a charge for less than a day. The 7 plus use to last for 4 to 5 days. My wife’s 7 also had a battery swap and her battery drains as well after loading. All 3 phones?? What is the issues?

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.

Update on the 6S Handoff disabling. It does work for me, but there seems to to be a time period of several hours where it becomes ineffective. BUT- if I do a toggling to enable> disable, I'm good for several more hours. I'll try to discover the length of time it is good. I also have auto bluetooth disabled. Airplane mode preserves the battery - but less useful for phone use.

This a huge fail for Apple- in support it just has a reference page on proper care of lithium batteries!

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.

Hi, It seems like the iOS version is faulty. I did fix the problem on my iPhone 5s. I downloaded the iOS off the internet and then restored my iPhone as a new phone from a backup. Because of this mess, I asked iTunes for a refund as I thought I lost everything including ringtones which I later found. Nevertheless, they did say that everyone should provide feedback.

I had posted that iOS 11.4 was killing my battery even though I tried many ways to install and re-install it and had tried re-setting network settings etc. etc., all to no avail. I finally decided to try iOS 12 beta 1 and everything worked fine for several days. Today Apple released iOS 12 beta 2 - as soon as I installed it, my battery life got killed again, as bad or worse than iOS 11.4. My recommendation is to install iOS 12 beta 1 but DO NOT INSTALL beta 2. I reverted back to iOS 12 beta 1 and am a happy camper again!

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?

yes has same problem. very sad battery drain problem become worse every update and it is the worst in this 11.4 ... please fix it asap. now scare of any future update from apple and need to becareful before update. such a simple thing Apple also cannot provide. ( sad , dissappointed and angry).

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

I upgraded on May 29. It will soon be month that I have this battery drain problem. I have hands off turned off. I have notifications turned off and background refresh has never been turned on. I have deleted apps. I have done hard resets. A few weeks ago I went to the Apple store. They told me there is no problem with battery drainage and I should buy a new battery. They checked my battery and found the health to be at 94% so declined a new battery. They said they could do a factory reset. I went that route and it reinstalled os11.4 so I am back to the same problem. Turned off wi fi and it didn't help. I have the iPone6. I am charging 4 times a day. I can pick up my phone after not using it all day and watch the battery drop by 50%. My daughter has an iPhone7 plus and has the same problem. Some people say their phone works fine at the wi fi at work. That isn't so for my daughter. Here battery drops whether she is at home or work and has to keep it plugged in while at workI was very happy with my phone until this upgrade and it makes me leery about installed the os12 update when it comes out. I have turned off automatic updates so I won't get anymore unpleasant surprises from Apple. Come on Apple. When are you going to fix this problem.

I, too, am shocked that Apple has not released a fix for this WIDESPREAD problem or even acknowledged it. They unsigned 11.3.1 so users can't even install that anymore. I'm saddened to say that Apple may have lost its way.

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 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.

If that’s the case then why is my SE draining when I don’t use Bluetooth or have a car? Keep cellular off unless I really need it, have never had this problem before last update. I can have my phone off, no cell, no WiFi assist, as many background apps as possible turned off, only use the phone to make calls and quick texts. It drains completely overnigh, without having used the phone even. Have on battery saving mode, battery health is 100%.

My mini 4 is only getting about 4 hours before the low battery warning pops up. That never happened before, always a good 8+ hours before needing charging.

Having initially had this problem (see my earlier post), I simply continued to ride out the issue and now, about a week and bit after I posted the intial problem, battery life seems to have settled down somewhat without me doing anything at all. From 100% at 11pm last night, left on bedside table (not plugged in) and battery only dropped to 98% by 7am. My guess is that the update just needed to do a lot more background indexing etc over the course of a couple of weeks.