iOS 8 Beta 5 - Severe battery drain even with "draining" features off

rrs0725

macrumors newbie
Original poster
Jun 19, 2012
16
0
Since updating to Beta 5 on my iPhone 5s, I'm losing about 10% battery per hour with the phone in sleep mode and no incoming calls or messages or notifications whatsoever, and with reduce motion on, brightness well below 50%, background app refresh completely off, push email off, and anything else I can think of that would drain the battery.

With the phone in complete airplane mode, without even so much as lighting the phone up once, I lose 4% battery life every 30 minutes. Normally I can go a good couple hours in airplane mode and lose maybe 1%.

When playing music via bluetooth to a wireless speaker with the rest of my phone in airplane mode (everything but bluetooth), I lose 30% battery per hour. I've never seen such drastic battery drain on my iPhone, a user of every model since the 3G.

Previously in iOS 7 versions and iOS 8 Beta 4, I would lose maybe 1-2% per hour even with an occasional notification or incoming message and with all previously mentioned functions off, and maybe 3% per hour when listening to music via bluetooth with the rest of the phone in airplane mode.

Anyone have any ideas on how to correct this, or is it now just about waiting for the next beta for 2 weeks?
 

Armen

macrumors 604
Apr 30, 2013
7,392
2,266
Los Angeles
Since updating to Beta 5 on my iPhone 5s, I'm losing about 10% battery per hour with the phone in sleep mode and no incoming calls or messages or notifications whatsoever, and with reduce motion on, brightness well below 50%, background app refresh completely off, push email off, and anything else I can think of that would drain the battery.

With the phone in complete airplane mode, without even so much as lighting the phone up once, I lose 4% battery life every 30 minutes. Normally I can go a good couple hours in airplane mode and lose maybe 1%.

When playing music via bluetooth to a wireless speaker with the rest of my phone in airplane mode (everything but bluetooth), I lose 30% battery per hour. I've never seen such drastic battery drain on my iPhone, a user of every model since the 3G.

Previously in iOS 7 versions and iOS 8 Beta 4, I would lose maybe 1-2% per hour even with an occasional notification or incoming message and with all previously mentioned functions off, and maybe 3% per hour when listening to music via bluetooth with the rest of the phone in airplane mode.

Anyone have any ideas on how to correct this, or is it now just about waiting for the next beta for 2 weeks?
I have everything turned on and background refresh for all apps turned on. Battery life for me is just as good as 7.1.2

Try restore as NEW?
 

doublex14

macrumors regular
Jul 25, 2014
106
2
PA
This happened to me in B4 and B5 too! I decided to restore to a backup but it seems the battery drain "bug" stays on the phone unless you restore as new. I will probably do that just to be safe (restore as new to iOS 7) but it IS a beta so these things are expected
 

MrGimper

macrumors 604
Sep 22, 2012
6,574
7,182
Andover, UK
Not any help, but I find beta 5 battery to be much much better than beta 4. Im sat on 60% now, where on beta 4 I'd be lucky to have 15% left at this time.
 

newfoundglory

macrumors 6502
Nov 5, 2007
272
5
Had excellent battery life with beta 4, some of the longest ever i would say. But 4S got very hot while charging.

Now with beta 5 doesn't get hot, but I have the worst battery life ever, lasts only several hours going from 100 to zero even when not being used. All battery draining features are turned off.

Had 42% leaving work and within 90 mins I was at 0, phone switched off - now done a full charge to 100 so going to see how it goes before deciding what to do next.
 

Stuke00

macrumors 68000
Oct 11, 2011
1,674
74
Collinsville,IL
Had excellent battery life with beta 4, some of the longest ever i would say. But 4S got very hot while charging.

Now with beta 5 doesn't get hot, but I have the worst battery life ever, lasts only several hours going from 100 to zero even when not being used. All battery draining features are turned off.

Had 42% leaving work and within 90 mins I was at 0, phone switched off - now done a full charge to 100 so going to see how it goes before deciding what to do next.
Have you look to see what is using your battery?
 

newfoundglory

macrumors 6502
Nov 5, 2007
272
5
Have you look to see what is using your battery?
Its not really clear. Safari 30-40%, Home/Lock Screen 20-25% are the top 2. Why it was draining so fast I have no idea. Standby its been static on 100% for the last hour or so now, so just going to monitor it. Maybe it was some sort of battery calibration thing... or maybe not lol :apple:
 

Xenc

macrumors 65816
May 8, 2010
1,037
180
London, England
It's the iOS 8 beta, not your battery. Try turning off data or entering airplane mode between charges if it's becoming problematic.
 

spiezer

macrumors member
Jul 5, 2009
34
7
I've been having a similar issue only when using bluetooth.

When connected, the phone would operate at higher than normal temperatures. After disconnecting, the phone would return back to normal temperature and the battery drain would stop.

Happens with:
Pebble smartwatch
Garmin GPS
 

Stuke00

macrumors 68000
Oct 11, 2011
1,674
74
Collinsville,IL
Its not really clear. Safari 30-40%, Home/Lock Screen 20-25% are the top 2. Why it was draining so fast I have no idea. Standby its been static on 100% for the last hour or so now, so just going to monitor it. Maybe it was some sort of battery calibration thing... or maybe not lol :apple:
It may be. My phone was dying pretty fast. Google Hangouts was my #1 culprit. It even stated "Background Activity" even tho I had Background Refresh disabled for that app. But I decided to let my phone drain and recharge for calibration. It stayed at 1% for A LONG TIME. Maybe an hour or 2 of usage. It has been pretty good so far today.
 

newfoundglory

macrumors 6502
Nov 5, 2007
272
5
It's the iOS 8 beta, not your battery. Try turning off data or entering airplane mode between charges if it's becoming problematic.
I got to work today on 82%, put it in airplane mode and it was at 10% within 3 hours. It got quite warm too, even though there were no apps left running. The logs on the phone keep logging a bug type, thermal not updating backboardd... so maybe something is very wrong with this update. Going to do a restore and see if that fixes otherwise i'm back to 7.1.2
 

brentg33

macrumors 6502a
Mar 5, 2007
552
0
Beta 5 here too. Ota update from 4. On a iPhone 5. Really bad battery drain. Seems like it's worse between 100%-80%. Seems to slow down after until it's gets to 30% or so. Also feeling hot. I tried turning off handoff (as I don't have my imac running 10.10 yet). Still not much better. Has anyone found that a restore to beta 5 and starting from scratch helps?
 

brentg33

macrumors 6502a
Mar 5, 2007
552
0
a restore of iOS 8 beta 5 and starting the iPhone 5 from scratch (not an iCloud backup) seems to have made it a whole lot better
 

clevins

macrumors newbie
Jul 26, 2014
25
0
I got to work today on 82%, put it in airplane mode and it was at 10% within 3 hours. It got quite warm too, even though there were no apps left running. The logs on the phone keep logging a bug type, thermal not updating backboardd... so maybe something is very wrong with this update. Going to do a restore and see if that fixes otherwise i'm back to 7.1.2
The reason it got warm was SOMETHING was running, so it's incorrect to say no apps were running. B5 is, for me, about the same as 7.1.2 so there must be something causing issues for you and others. Remember, the first few hours it's resyncing to iCloud, updating to iCloud drive, etc. After that it should be pretty much fine. If it's not, you can try two things:

1) kill all apps (double press the Home button and flick up on each app), then force reboot (Hold Home + Power until it reboots). If that doesn't fix things....

2) restore as New AND setup your machine as new.
 
Last edited:

nheilweil

macrumors 6502a
Jul 10, 2008
599
147
Redmond, WA
Try checking Settings/Privacy/Location Services/System Services and see if anything is active (purple). My phone will get Location-Based iAds and others stuck on resulting in fast battery drain and a hot phone. My recommendation is to shut off all Location Services and see how your battery does.
 

E2EK1EL

macrumors 6502
Nov 19, 2012
493
8
Clean restore + fresh start

On my IP5s, browse the web and took a few pics and already the CPU started to get pretty warm.
 

mizxco

macrumors 6502a
Jun 17, 2014
742
256
Actually updating OTA from b4 to b5 has been great on me.
Battery life is significantly better on b5
 

MarcusCarpenter

macrumors 6502a
Feb 18, 2013
757
91
London
I don't know what you're on about, iOs 8 beta 5 has been by far the best in battery life experience I've seen for ages. I have two 5s's one with 7.1.2 and one with 8b5 and could easily last one and a half days usage without charge on 8b5 where as the device with 7.1.2 has to be charged everyday

[Edit] Also i would like to add that i have not turned ANY features off at all, everything is on inc Location [/Edit]
 

PNutts

macrumors 601
Jul 24, 2008
4,839
347
Pacific Northwest, US
Close all apps or do a reset. if it's not a beta bug then an app is keeping a load on the phone. If the reset works, the problem may return when you start the offending app.
 
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