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IOS 4.2.1 battery drain

Anyone noticed any battery drain so far on IOS 4.2.1?

iPhone 4, iOS 4

Posted on Nov 23, 2010 10:19 PM

Reply
526 replies

Dec 10, 2010 6:27 PM in response to Lawrence Finch

Lawarence you think you know everything and really you are far from knowing it lets see some usage posts of what your getting with the settings your saying and the apps.. My guess is you have very little on your phone which is not the purpose of which it was designed for.. Apple paying you to stick up for there product?... certainly many of the people who come looking on this are not even aware what the causes could be and infact try your solution only to come back later saying nothing changes.. your worse then apple with delaying the solution hoping they will try things and might think its better but in reality there is a bigger issue!

Dec 10, 2010 6:50 PM in response to Mindblowerz

Well personally I want to thank Lawrence for the fixes, it helped me.

I still feel that users should not have to go to these lengths to fix this issue.

If anything it might be APPS causing the problem and not apple directly, who knows.

Anywho, "Set as New" should be used as a last resort, but for impatient people like myself it fixed the issue quickly.

Dec 11, 2010 1:01 AM in response to Calgarystar

I'm sure you must be right that I don't have enough apps. I have only 168 apps on my phone, 5 email accounts, 3 contact groups and I leave everything on all the time (3G, WiFi, Location Services, BlueTooth, Notifications, Push and I use a bluetooth headset extensively). I get over 100 email messages a day. I recharge the phone overnight so it is at 100% in the morning and at the end of the day in the evening my charge varies from 60% on weekends to 20% on most weekdays. On rare occasion if I make a few long calls I need to recharge before the end of the day (once or twice a month). I carry a spare Li-ion recharger so I don't have to plug it in.

oh thank you lawrence you helped me a lot thank you again


Lawrence, i did the reset for all network and general settings and my battery is holding its charge normally. Thank you very much for your advice


rence I love you. I was about to throw the phone out the window....So anyone with the same problem I would suggest Lawrence

Dec 11, 2010 2:30 AM in response to Lawrence Finch

I do not mind that the problem happened, but what I mind is who should take the responsibility of fixing it. It should be fixed. In my logically computer-engineering thought, by the small group of Apple's team rather than working around by some millions of 70 million users, if not all, around the world 1-by-1.

I really appreciate your helpful instruction to all of the iPhone users here. But it is different from the way we should solve this problem.

Dec 11, 2010 4:47 AM in response to ZyberSup

ZyberSup wrote:
I do not mind that the problem happened, but what I mind is who should take the responsibility of fixing it. It should be fixed. In my logically computer-engineering thought, by the small group of Apple's team rather than working around by some millions of 70 million users, if not all, around the world 1-by-1.

I really appreciate your helpful instruction to all of the iPhone users here. But it is different from the way we should solve this problem.

I agree that Apple should have a solution. My best guesses as to why they don't are first, that it doesn't affect millions of the 70 million, it affects a few hundred or a few thousand at best. When a problem affects millions of users (as the baseband problem in 2.0 did) the boards have tens of thousands of posts, not hundreds. If anything there have been far fewer complaints of this problem with 4.2.1 than there were with earlier releases.

The other reason is that it isn't one problem, it is many different problems. The SYMPTOM is consistent (unusually heavy battery drain), but the fact that different solutions work for different people means that there are many causes.

Between these two it is likely that Apple cannot reproduce the problems, and if they can't see them in the lab they can't fix them.

Dec 11, 2010 6:31 AM in response to Calgarystar

I have not seen anyone post what app was causing it, or which of Lawrence's steps were causing it. Just jumping right to a "restore as new" may help some, but not not others. What I'd like to see is more "I reset network settings and it fixed it". Or "I restored as new and only installed my apps a few at a time. I found it was the 'I love twitter app that caused it'"... The only commonality I've picked up on is Exchange 2010 activesync. Yes, that's the one I've been looking for, because that is the problem I am having. Not hardware, not app or network settings, Exchange 2010 with push on kills my phone! The solution for me has been leaving push off and only manually syncing my phone. I'm able to do this now because I've been working at my desk for the last week or so and not needed push email on my phone. But when I go back on the road, push has to be on! So my choices are to completely change my company's email service, or purchase an Android... I can't survive on only able to get 16 hours of total time out of my phone (8 usage 8 standby).

See my earlier posts as to how I narrowed it down to an issue with my push Exchange account.

FYI, push has been off all week for me. Current usage is 2h26m, standby at 1 day, 15 hours...

Dec 11, 2010 6:46 AM in response to Nick Licari

Nick Licari wrote:
I have not seen anyone post what app was causing it, or which of Lawrence's steps were causing it. Just jumping right to a "restore as new" may help some, but not not others. What I'd like to see is more "I reset network settings and it fixed it". Or "I restored as new and only installed my apps a few at a time. I found it was the 'I love twitter app that caused it'"... The only commonality I've picked up on is Exchange 2010 activesync.

It takes some digging, as responses are in multiple threads, but as I posted the list I also track the responses. I've also noticed that it is very rare for people to report that something worked if it fixed their problem; it's much more common for people to say what didn't work.

By far the most common fix is to delete the Exchange account, reboot and add it back.

I've seen several responses saying Reset Network Settings fixed it. And several more saying Reset All Settings fixed it.

For apps, I've seen Game Center as a major one, and killing it in the Recent tape does not kill the background process. The only way to deal with Game Center is to set a restriction on Multiplayer games.

Other apps that people have reported are Skype and Facebook. I've done some controlled tests and found that DataMan uses up battery. Not lightning fast, but my battery life is 10-20% lower at the end of the day with DataMan on.

As to doing a Restore as New, almost all reports say this works, especially if you do an Erase All Content and Settings first. There are a few phones that are not fixed by this; my guess is that there is something marginal in the hardware that the new release has found. I've also seen responses that say doing a Restore as New, then later restoring the backup resolves the problem. However others report that once the backup is restored the problem returns.

Dec 11, 2010 10:04 PM in response to Lawrence Finch

Lawrence Finch wrote:
ZyberSup wrote:
I do not mind that the problem happened, but what I mind is who should take the responsibility of fixing it. It should be fixed. In my logically computer-engineering thought, by the small group of Apple's team rather than working around by some millions of 70 million users, if not all, around the world 1-by-1.

I really appreciate your helpful instruction to all of the iPhone users here. But it is different from the way we should solve this problem.

I agree that Apple should have a solution. My best guesses as to why they don't are first, that it doesn't affect millions of the 70 million, it affects a few hundred or a few thousand at best. When a problem affects millions of users (as the baseband problem in 2.0 did) the boards have tens of thousands of posts, not hundreds. If anything there have been far fewer complaints of this problem with 4.2.1 than there were with earlier releases.

The other reason is that it isn't one problem, it is many different problems. The SYMPTOM is consistent (unusually heavy battery drain), but the fact that different solutions work for different people means that there are many causes.

Between these two it is likely that Apple cannot reproduce the problems, and if they can't see them in the lab they can't fix them.


- From the symptom happened,
- and from the amount of people got the same symptom although it is from different causes (but surely not ten-thousand of causes),
- and from the history of version that the problem that happen to many stuffs in almost everytime of upgrading the OS,
- and from the cause of problem about the metadata or profile of some apps that Apple gave to us,
- and from my knowledge on developing many kinds of software (OS, compiler, win32 apps, web apps) for more than 10 years,

I do not agree to you that Apple team might not be able to reproduce the problems. It is not that difficult when there are a few different symptoms happen to ten thousands of users.

And it is possible for Apple to delegate the debugging task, including reproducing bug, to the developers of the app with their suggestion or updated document of what are changes.

Basically, as I expect Apple to be a high standard of manufacturer, they should calculate the affected gadgets from the statistic method, rather than just counting the users who posted the problem here. People can expect millions of iPhones affected with this problem, not just ten thoundsands.

Dec 12, 2010 12:56 AM in response to nymaxmo

Lawarance you are just making up excuses for Apples poor coding.. people should not have to redo there phone everytime, remove and add things manually turn off every setting its garbage you pay good money for phones .. and get poor product and service as a result of helping them become who they are today.. The apple can fall from the tree all it takes is a few strong people with knowledge to pick the apple and drop it in a bucket and make juice out of it 🙂

IOS 4.2.1 battery drain

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