Excessive idle battery drain after 13.4.1 update

I updated my iPhone 7 Plus to 13.4.1 earlier this week. Ever since, I am noticing that my battery drains excessively overnight. Here is a screenshot from yesterday night:

As can be seen, the battery was fully charged at 2:22 a.m and the phone was unused until 11:20 a.m. In these 9 hours, battery drained from 100% to 78% with absolutely no use. Even the battery stats don't show any misbehaving apps.

Also, I was checking the settings to understand why it happened, and my battery dropped from 78% to 69% in less than 10 minutes.

All these problems have started after the 13.4.1 update.

Phone: iPhone 7 Plus

Battery capacity: 85%

Anyone else facing this issue?

iPhone 7 Plus, iOS 13

Posted on Apr 8, 2020 11:45 PM

Top-ranking reply

Sridhar Ananthanarayanan Author

Level 1

83 points

Posted on May 5, 2020 12:22 AM

It is definitely a software bug. Until 13.4, everything was fine on my phone (iPhone 7 Plus), and there was no problem with battery (Battery health is at 85% for over 6 months now). I always leave everything ON (Bluetooth, mobile data, WiFi, location, etc.) and the battery graph would be flat overnight.

This problem started with 13.4.1, which bought fixes for Bluetooth and FaceTime (ironically I didn't have any problems with either before the update). You can do the following:

1. Turn OFF both Bluetooth and FaceTime from Settings before going to sleep.

2. If the above doesn't help, turn on airplane mode before going to sleep.

In my case, I haven't turned off or tweaked any other setting to save battery. I mean background refresh is allowed for essential apps, location is ON and allowed for essential apps ('always' for Google Photos and 'when using the app' for maps, etc.).

The only thing I do before going to sleep is turn OFF Bluetooth from settings (WiFi stays ON). And my battery holds on well (flat battery graph) until I wake up the phone in the morning.

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62 replies

Apr 10, 2020 11:08 PM in response to Sridhar Ananthanarayanan

This is the screenshot from yesterday night:

As can be seen, the battery dropped from 100% to 84% in 6 hours of absolute no use. There are no offending apps either based on the stats.

I’m also noticing that once I start using the phone, the battery drops drastically by about 8 to 10% in the first 10 minutes before stabilising.

I have never seen this kind of a behaviour with my phone in the last 3.5 years of use throughout all the updates over that period.

DibM

Level 1

4 points

May 9, 2020 7:07 AM in response to Sridhar Ananthanarayanan

Sorry to say but on my iPhone 6s turning off bluetooth had no effect on the battery drain. I am running out of ideas.

50 percent loss after 8 hours in powersavemode!

My wife’s iphone 11 pro and her older iPhone X have no problems. They lose one or two percent over night with 13.4.1.

We have an older 5s who cant get ios 13 and with its very poor battery it loses a couple percent over night. Now it performs better than my 6s who got a new battery last year.

DibM

Level 1

4 points

May 9, 2020 7:18 AM in response to DibM

I have never turned on Siri so it is not the culprit on my 6s.

The worst is not the excessive drain when i sleep since i could charge it all night but for all those working away from a charger it could be a big problem that their iPhone drains battery without any reason.

dommy179

Level 1

30 points

May 15, 2020 1:10 AM in response to haMz22

, Holy Zeus, time to put my iPhone in the freezer, LOL, I meant time to put my iPhone SE on charge, this is large, the third, fourth, charge on the dayI have not experienced any battery join on my end, running an iPhone SA first generation, maybe it’s because I keep my phone on the charger pretty much all night, last night, some Apple support guy told me to reset my phone because of the software as you, I want to kick his butt now, he made my phone suffer, I was crying a bit last night because of it, and because I was crying last night, I could not go to bed until 1 am, stupid guy, least I got my phone back and running again, all my data was recent, but I well, least I Least I got my Apple ID now, my old one was reset Only reason why done on my data was the race because the backup was taking too long and I did, not once at the take too long, I’m way better now that my phone is working, I’m currently beta testing iOS 13.5, and I see no battery drain, iOS for 13.4.1, there was a little battery drain, but I must keep Bluetooth on to use my JBL tune 500 headphones with my iPhone SE first generation, Holy Zeus, time to put my iPhone in the freezer, LOL, I meant time to put my iPhone SE on charge, this is large, the third, fourth, charge in the day

May 18, 2020 4:44 AM in response to Sridhar Ananthanarayanan

https://discussions.apple.com/thread/251259807?answerId=252636491022#252636491022

I don't know how much this has helped, but post this my battery has shown considerable improvement since updating to 13.4.1 about a month back. I am back to leaving everything ON all the time. Here is last night's battery stats:

That's 3% in over 7 hours.

As someone in this forum said, we don't know if battery draining was due to iOS collecting Covid19 contact data using Bluetooth. Over the course of the month, it may have finished collecting much of the data required and hence battery life has improved. All these are, however, wild speculation.

DibM

Level 1

4 points

May 21, 2020 10:53 AM in response to Sridhar Ananthanarayanan

Sorry, i have not figured those out yet.

I have nothing running that can explain it.

Apple gurus could probably use some software to see exactly what is going on but for now i give it a rest.

Another positive thing about 13.5 is that the phone is much cooler during gaming!

Before it got so hot it throttled down CPU-speed and the game stuttered and i would get my *** kicked.

Now it gets warm but i can no longer fry an egg on it..

May 24, 2020 1:05 AM in response to GREAT DIVIDE

You can't call it bogus. The workarounds have worked for a few people, including myself. They haven't helped everyone, including yourself. Because each device, and usage is different. But good to know 13.5 has solved all those issues for you.

Wildrams

Level 1

4 points

May 25, 2020 12:21 AM in response to dommy179

Without an update to 13.5 and any change in setting, the over-night battery-draining disappeared for the last two days. So I think this is not related to the update but something what the system did at the background without any notification what is it.

hed1117

Level 1

31 points

May 27, 2020 3:34 PM in response to Sridhar Ananthanarayanan

I avoided upgrading my 7 Plus from 13.3 due to reading about battery and connectivity issues but my sister gifted me an Apple watch recently (very generous!) and in order to download the watch app to my iPhone I was instructed to upgrade my iOS

Ever since I have the same battery drain issue that Sridar describes. I also have never-experienced-before connectivity issues with internet and bluetooth!

Very upsetting. Fwiw I already sent feedback to Apple.

Apr 9, 2020 8:14 PM in response to Sridhar Ananthanarayanan

Same problem I have before upgrade I can use my phone over 8 hours but now only 4 hours

TCvannak

Level 1

4 points

Apr 17, 2020 9:27 PM in response to Sridhar Ananthanarayanan

https://games.app.goo.gl/1oiwdB7qY6oVDPFB7

Unklemac

Level 1

4 points

May 4, 2020 1:48 AM in response to Sridhar Ananthanarayanan

Yes, I will test during sleep tonight and report my findings. Probably aligned with your results.

May 9, 2020 2:27 AM in response to Sridhar Ananthanarayanan

Here is screen shot of last night my battery drainage is fast in idle mode. I had Off my Bluetooth from setting again its not useful

May 9, 2020 8:58 AM in response to Sridhar Ananthanarayanan

I had off the Bluetooth and Siri also from setting but not useful please tell me after updation why this suddenly start this problem

May 11, 2020 7:50 AM in response to SravanKrA

How are you “Apple recommended”? You copy and pasted a non related generic and robotic response to a very specific question. Super annoying in my opinion.

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Excessive idle battery drain after 13.4.1 update