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Battery drains faster since 4.3.5 iOS update

I'm noticing that my iPhone 4 battery is draining faster since last update. Is it just me? Is someone experiencing this? Is my iPhone battery dying?

iPhone 4

Posted on Jul 29, 2011 3:20 AM

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77 replies

Jul 30, 2011 12:45 AM in response to BrunoOliveira

Me too -- major battery problems after the update. I've also noticed that "Usage" and "Standby" time are almost the same. I think this indicates that there is something running in the background, per:


http://support.apple.com/kb/HT1805?viewlocale=en_US


I haven't installed any new apps.


Can you guys check to see if you are seeing the same behavior with the usage statistics?

Jul 30, 2011 2:51 AM in response to Fishman Dan

If the 2 times are the same, that means the phone is always doing something.


I also noticed my celluar data use was very high when I haven't been using the phone.


I just went into settings and disabled: location services, push notifications, and set "Fetch New Data" to off, set polling to manual. It appears to have fixed the problem -- "Usage" is now less than standby, and the phone is running cooler.


I'll let it go for a while to verify, and then start turning the services back on to see what the culprit is.


I'm gonna bet its my MobileMe syncing.

Jul 30, 2011 10:10 AM in response to BrunoOliveira

Thanks for your replies :) Well, I think there might have been some sort of service running which was consuming power. I let the iPhone drain battery until it "dropped dead" and then I put it reacharging until battery full. Now it seems like it's working on a more normal fashion. Maybe restarting the phone solves the issue but it can happen again. I'll let you guys know if it gets worse again.

Jul 30, 2011 3:32 PM in response to BrunoOliveira

Another night to wake and find my phone completely drained.


I have 2 mail accounts, the Exchange server is only managing my Contacts at this time (long story). I've fiddled with it to see if that settles down. If that is part of the problem, my concern still exists as to why it's such a major problem with this version of the iOS, when all previous weren't.

Jul 30, 2011 3:41 PM in response to Fishman Dan

Fishman Dan wrote:


Another night to wake and find my phone completely drained.


I have 2 mail accounts, the Exchange server is only managing my Contacts at this time (long story). I've fiddled with it to see if that settles down. If that is part of the problem, my concern still exists as to why it's such a major problem with this version of the iOS, when all previous weren't.

All previous weren't for you, perhaps, but were for others. There is no problem with 4.3.5. There is a problem with your phone. Delete your Exchange accounts, reboot the phone and add them back.

Jul 31, 2011 4:21 AM in response to Lawrence Finch

Lawrence Finch wrote:


Fishman Dan wrote:


Another night to wake and find my phone completely drained.


I have 2 mail accounts, the Exchange server is only managing my Contacts at this time (long story). I've fiddled with it to see if that settles down. If that is part of the problem, my concern still exists as to why it's such a major problem with this version of the iOS, when all previous weren't.

All previous weren't for you, perhaps, but were for others. There is no problem with 4.3.5. There is a problem with your phone. Delete your Exchange accounts, reboot the phone and add them back.

Turns out it was my Exchange connection (which is only used for Contacts currently). I'm still scratching my head as to why the battery drain only surfaced after upgrading to 4.3.5, but regardless I've deleted the profile. Being the weekend it isn't a good time to troubleshoot, I'll suss it out in the morning.


Basically after another full charge, it took 45 minutes to drain 10%. I deleted the profile and the battery drained a further 15% over the next 7 hours (including general phone/internet use). Problem solved .... sort of.

Battery drains faster since 4.3.5 iOS update

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