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macrumors bot
Original poster
Apr 12, 2001

The iPhone Blog reports that Apple is taking steps to investigate numerous reports of reduced battery life from iPhone OS 3.1 users. The company's AppleCare division has reportedly begun contacting users complaining about the problem in its support forums, asking users a series of 11 questions about their battery life issues.
An undisclosed number of users who have posted on Apple's discussion boards about poor battery life following the iPhone 3.1 software update are being contacted by AppleCare helpdesk with a hefty list of 11 follow-up questions. These questions focus primarily on the usual battery culprits, email (especially push), WiFi and Bluetooth, and App Store apps. Number 10, asking "When you notice a power drop, does it seem to be a legitimate power drop, or rather an issue with the battery icon indicator?", is certainly interesting.
Users are also being sent a "Battery Life Logging" configuration profile for installation on their devices. The configuration profile reportedly tracks battery usage data and syncs it to iTunes, where users are asked to send the data back to Apple for analysis.


iPhone OS 3.1 was released earlier this month at Apple's "It's Only Rock and Roll" media event and brought a number of enhancements for iPhone and iPod touch users.

Article Link: Apple Investigating Reports of Poor Battery Life for iPhone OS 3.1 Users


macrumors 6502a
Aug 2, 2005
Good. I am one of the many that has seen a dramatic decrease in battery life since 3.1. I did NOT have any battery problems under the 3.1 betas.


macrumors 68000
Feb 5, 2008
Probably just a firmware glitch. I'm sure they'll do the appropriate analysis and patch it promptly.


macrumors regular
Jan 15, 2008
This should be interesting. I think it is funny how it mentions they ask about wifi bluetooth and push. I went to the genius bar asking about my battery life and he told me that I should have wifi location services bluetooth and push turned off until I have to use it.

I just think it is sad that other cheaper and much less advanced phones can have all of these things on and enabled and last days on a single full charge.


macrumors 68000
Jul 20, 2008
this is one reason why i dont update things for weeks or months at a time. i just realized there was a 3.0.1, 2 weeks ago.

itunes same thing. .i think i do have itunes 8 though.


macrumors G4
Mar 20, 2003
Bay Area
On one occassion with 3.1 I saw my reported % drop from 55 to 28. But as apple's question indicates, it was just an issue of reporting, not a real drop, because the % then stayed at 28 for a very long time, and when I plugged in, it "went up" to 36, which I assume is what it was really at. A little strange, but I'm more concerned with how long my battery actually lasts than what the indicator says.


macrumors newbie
Sep 24, 2008
Good. I am one of the many that has seen a dramatic decrease in battery life since 3.1. I did NOT have any battery problems under the 3.1 betas.

Initiate DFU mode on your phone and restore the phone. Be sure to set up as "new phone" when you sync your data back unto the phone. Prior to the growing numbers of users experiencing lack luster standby or usage reports, I was sure that I had a physical issue with my 3G. Since the process that i have described above I now have much better battery life. Please reply back either way if your finding differ than mine.


macrumors member
Sep 14, 2008
Reasonable Drain

hmmm...I'm wondering how much of the "poor battery performance" is due to increased iPhone usage of the new features.


macrumors 68000
Mar 10, 2003
Wirelessly posted (Mozilla/5.0 (iPhone; U; CPU iPhone OS 3_1 like Mac OS X; en-us) AppleWebKit/528.18 (KHTML, like Gecko) Version/4.0 Mobile/7C144 Safari/528.16)

I noticed diminished battery life on my 2G iPhone after the 3.1 update. Don't know if it's "legitimate" or icon glitch since I recharge when the indicator shows a loss of 30% power. Pre 3.1, I could go all day on standby with BT and wifi enabled and lose about 10% power.


macrumors member
Nov 1, 2007
The only time I've noticed a massive power drop is when I am in range of an active bluetooth device that has not been paired with my phone. Still, it takes 6-7 hours before it's dead. I happened to notice this last week when I had my phone sitting on my desk next to a dell mini 10v with BT turned on. By the end of the work day, my phone had gone from fully charged to nearly dead.


macrumors newbie
Feb 27, 2009
Interesting, I have not noticed any excess usage of battery in 3.1, but I have been playing intense game which do drain the battery. I'm sure there will be a patch in the near future if this is a real problem. I have to say when there is an OS issue with Apple, they do come out with fixes relatively quick which usually fixes the problem.


macrumors newbie
Sep 8, 2003
I'm glad to see this is being raised. I've been noticing really appalling battery life lately and I was getting concerned.


macrumors 604
Sep 20, 2006
There & Back Again
My battery life became awful after 3.0 - but since 3.1 I've had no issues again. Before 3.1 I could barely get 6-8 hours out of it - and this is normal use mind you. I'm doing the same thing now and it's fine. Weirdness.

Aside from that, I am finding that the overall stability of the OS has dropped significantly on my handset since 3.1 - lots of screen freezing, parts of the UI not appearing (eg when I open Mail the top and bottom grey bars are missing and I have to restart the phone). It's very frustrating when you have business to do on your phone!

I have the 3G - hopefully when I get the next revision all my troubles will be gone!


macrumors member
Jun 9, 2008
they need to fix the "unresponsive" issue along with this...not just a battery issue


macrumors 6502
Nov 1, 2002
The Desert
I have not noticed any problems with my 3G sine upgrading to 3.1; I do wish they had a customizable one step Energy Save preference option that would optimize power usage when needed.


macrumors 65816
Sep 29, 2006
Me too. I have it plugged in over night and take off at 7am with 100%. By 8pm with light use it is down to 30%.


macrumors 6502
Sep 19, 2008
Las vegas
Same issues here, although I find the random freezes that require a hard reset to fix more annoying then the battery life issue.


macrumors member
Aug 25, 2007
the battery on my 3GS has been terrible since I updated. Dramatically. I drop to 80% charge after an hour.. then it goes down equally fast for the next few hours, until it shuts down. So that tells me it's actual battery drop and not a power meter issue. I hope they get it fixed!


macrumors newbie
Jun 19, 2009

What great features did 3.1 add again?

'Cause the only diff I see on my 3GS is that my playlists are all messed up.


macrumors 6502
Jul 23, 2002
Boardman, Ohio
No issues here...

I'm beginning to wonder if this is either poor reporting by the battery indicator or an issue of "junk" being left over from upgrading the OS.

I have no problems whatsoever with 3.1 on my 1st gen iPhone. Actually, while battery life has stayed relatively on par with 3.0, the performance of my phone has been better. On 3.0, I would encounter short periods of time where the phone would hang while it checked for mail in the background. This appears to have been fixed with 3.1.

Also, my wife's 3GS is not experiencing any of these battery issues as well.

Has anyone who has restored their phone in DFU mode encountered similar reported issues with battery on 3.1?


macrumors member
Jul 10, 2008
How about logging and fixing the coma issue here, Apple.

This is ridiculous - I've been awake for 2 hours this morning and already suffered 3 complete crashes, one which, after rebooting, trapped the iPhone in the camera app, where any button input from either the sleep or home button took a fscking picture of the screen.

This is retarded - I didn't pay a premium for a phone/ipod/media device that can't stay stable long enough to DO any of it!
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