iOS 11.4 battery drain

Hi nibor209

I think it may be related to what apps you have open when connected to wifi, even if the apps are not being used. I found that if the Safari and/or Map apps are open, my battery drains four times as fast since the 11.4 update. I confirmed it by ensuring I only have open what I truly need all the time, Messages, Notes and Settings and my battery drain is down to 1% every three hours. However, I had to turn of iMessages as that was increasing battery drain even when not using Messages. I still have to try opening Safari and Maps to see if consumption increases again to confirm. Still, even 1 % every three hours is more then before the 11.4 update. Prior to the update I merely used 3% in 24 hours when my phone was idle for most of it.

I’m having the same issue.....on my iPhone 6.

What I have found may work for others.

After charging your phone, remove the charging cable, use the shut down option under General Settings. Wait for 30 seconds and plug the charging cable back in.

Let the phone fully reset till it gives you the option to enter your passcode.

Enter your passcode, remove charging cable.

It‘s been 45 hours and I have 70 % power left.

It’s not perfect, not the answer, but then again, I don’t work for Apple and have access to their resources. If I did, maybe you’d be receiving a solution update from me tomorrow morning.

Texts and FB Messenger, some use on FB, Emails, made two short calls.

Surfed the web for a short time.

Did not want to push too hard first time.

I’m sure many others use their phone more than I do.

WiFi is off now. Looking to see if it completely drains the battery from this point.

This past Sunday I charged it normally, left it on with no soft reset. No use. Wanted to see how long it would last.

Completely charged ....lost 100% in about 12 Hours.

According to battery life info, I have 92% capacity use. Don’t know if that has any bearing on it.

Going to keep trying.

I've been having the same problem ever since I updated to iOS 11.4. I can go to bed with a fully charged phone and wake up to find it stone cold dead. I went to the Apple Store suspecting a bad battery, and after the tech ran some diagnostics, he identified a known problem that Apple engineers are supposedly working on. I went home without a solution to the problem and have been living with it for several weeks now.

BUT! I decided to use low power mode one day and no more battery drain. Yes, I have to live with low power mode for the time being, but at least my phone doesn't have to be charged three times a day anymore.

Sorry but not much of a solution, but it does help somewhat.

I'm sorry to hear that. I've switched both my wife's and my own phones over now, and neither have shown any sign of the battery drain problem today - yet.

This is really a weird one, and I hope Apple gets the problem fixed pronto. They told me at the Apple Store when I went in that their engineers are aware of the problem and are working on a fix for it, but that was almost two weeks ago now. They really should test their iOS upgrades a lot more before inflicting problems like this on us.😠

My wife's iPhone 6 is on 11.2.1 with no issues. She might plug it in once a day and can leave it unplugged over night with little drain. She also uses it as internet hotspot. My iPhone 6s on 14.1 can only go maybe 3 hours without plugging in. I personally won't try 11.4.1 or 12 until there are numerous all clear notifications. I doubt I will ever load later SW into her phone as I would rather stay with what works.

I only can say: MEE TOO

iPhone 6s. Battery health level. 87% but since 11.4 I have to recharge 3 times per day.

From 100% charge it drains to 90% within 15 minutes.

Desperataly waiting for the 11.4.1 fix. I just wanted to install beta 5 which recently was released for developers. But I have only access to the public betas, and only for iOS 12 which is not an option right now.

I am aware of the network setting reset to fix the problem (maybe), but I do not want to kill all my wifi password collection.

greetings

Bruno

Excuse me for my english, I am french and I have the same problem since I install the version 11,4. On my iPhone 6s, if I close the wifi, the battery is ok. Then I have a network wifi with 2 bands 2,4 and 5 ghz since a long time. I shut the 5ghz band on my network wifi and now it works only with the 2,4ghz band. Since my iPhone works correctly and thé battery is ok during 2 or 3 days. My iPad works also correctly now. I Don't open the 5 ghz band before a bew ios version.

Hi all, I've been faced with the same issue of battery drain since I installed iOS 11.4. Also with the iOS 12.0 public beta the issue was present. Yesterday, an update to iOS 12 public beta 2 was rolled out. It seems to be, that this an improvement. I left my 6s with 78% load over night connected wit 5Ghz Wifi. In the morning- 10 hours later, the battery is at 73%. Before it drains completely- First impression not bad.

Same issue. Virtually bricked my iPhone 6S now for all intents and purposes. Oddly, when actively using the phone battery life is OK, but as soon as you stop using it, the phone rapidly discharges the battery with or without WiFi on.

I think a class act against Apple will likely follow as they appear to be sitting in their hands and saying and doing nothing.

I just set background app refresh to WiFi only and switched off location services. Now my iPhone 6S appears to be back to normal. I’ll test put a few more scenarios, but that seems to be the basis of the problem.

The only way I can conserve battery is to switch to Low Power Mode.

Yesterday I was able to go from 7:30 to 2:30 and go from 100% to 69%.

This included 3 hours on WIFI. All on Low Power Mode.

My Battery Standby was about 2.5 hour greater than Usage so I wasn't using it constantly.

When I did start using for Hot Spot then the consumption went down rapidly.

It would help to be able to leave 100% on low power mode and not have it reset when it reaches 80%.

Try turning off location services and background app refresh. Then switch them back on. I set my background refresh to WiFi only. Still playing with those settings to try and narrow down the culprit. I appear to have better battery management now bot won’t know until later today.

My suspicion is Apple have put a new API or rules for apps that call background refresh.

My attempt to try another restore phone as new failed so I went for the iOS 12 public beta and the battery life is much better, probably normal, I can't remember what normal really was because it was so long ago. I think I must have the latest beta because the update check doesn't tell me there's a new version.

Update to my post from a couple of days ago:

This battery drain issue is far more complicated than I had thought. Even after updating our iPhone 6s and iPhone SE to Beta 12.0, our batteries sometimes work fine, and sometimes go right back to the draining problem at random. There's no pattern whatsoever.

I've tried changing our modem from 5 G to 2.4 G but again the same issue: sometimes batteries both work fine and sometimes they start draining just like before so I went right back to our 5 G wifi connection.

Just as an aside in case anyone's interested, this issue hasn't affected our iPad at all, just our two iPhones.