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iPhone Update 2.2 Drastically Reduces Battery Life

I just updated my 3G iPhone to software version 2.2. After making no other changes to the phone, the battery life has been reduced to only 4 hours (with no talk time and wifi still turned off). After plugging in the charger, it still took 30 minutes before the red battery/lightning bolt symbol disappeared and the phone restarted. What's wrong with 2.2(5G77) and when will a new update resolve the problem?

Message was edited by: ldcjim

Message was edited by: ldcjim

PC, Windows Vista, iPhone 3G

Posted on Nov 23, 2008 6:29 PM

70 replies

nikey33

Level 1

149 points

Nov 24, 2008 11:17 AM in response to The Dude Abides

im the same i cant help here, as i barely use the phone or mail, or surf much...so my phone can last over 2 days

Nov 24, 2008 11:57 AM in response to ldcjim

Just to bring some info to all of you out there who have experience battery life reduction since 2.2, I found this page and its links about battery life on the apple site.
http://www.apple.com/batteries/ (check iphone)
I will (I guess easily) run the battery completely off and make a full recharge as indicated. If it improve things I will report it here.

Nov 24, 2008 12:07 PM in response to Childerick

My battery life has also dramatically reduced since upgrading to 2.2

Today I had only 3 hours and 38 minutes usage out of it before it died on me! I used to get about 6 - 8 hours of usage out o fit.

My problem is that I bought the phone for GPS, Push mail and Wifi ... I don't want to have to turn that off to get the same battery life as a normal phone would with all those features on?

Apple needs to resolve this ASAP. Regardless of whether it affects 1% or more (MobileME stats here), this needs to be addressed as, in my opinion, 3.5 hours of usage renders the phone useless and I will then be returning it for a refund.

Nov 24, 2008 2:06 PM in response to Childerick

Just to compare, my model number is MB500NF. I am curious to know the model number of the other faulty iphones?...

Nov 24, 2008 2:07 PM in response to ldcjim

I have seen drastic reductions in battery life. To those with the increased battery drain, are you running jailbroken 3g's?

Nov 24, 2008 2:23 PM in response to iFidoBark

No, I use MobileMe and it only works with legit version of the iphone software... I believe....
Anyway, I don't see the point of Jailbrake versions when the true power of the iphone is in its great interconnection, over-the-air, via MobileME with my other Macs and PCs. Well at least it does it for me.
Well that is when the battery last as long as it did under 2.1....

Message was edited by: Childerick

Rweasel6

Level 1

0 points

Nov 24, 2008 2:44 PM in response to ldcjim

Same problem here. I charged it, tossed in my briefcase before I went to bed, and in the morning it didnt even have enough juide to be turned on.

Nov 24, 2008 2:52 PM in response to Rweasel6

Actually, this is the test I am doing. I have discharged my Iphone completely and recharged it. I will leave it over night and check in the morning: that's about 7h30. We will see.....

Nov 24, 2008 3:04 PM in response to Rweasel6

This is /exactly/ what happened to me. With 2.1, I would get 36 hours between recharges. Now, I get about 9 hours. In fact, I had it plugged in this morning until 8:30A and I had to plug it in 4:30P (at 10% remaining charge).

My usage has not changed.

Someone theorized that the network switching algorithm has changed and that it's working harder to find the right network.

I do use 3G and fetch mail from Gmail and Home once per hour... the same with 2.1.

Cheers.

Nov 24, 2008 3:46 PM in response to ldcjim

Here is a link to another forum that discuss the same topic:
http://forums.whirlpool.net.au/forum-replies-archive.cfm/1093046.html

Nov 24, 2008 3:51 PM in response to Childerick

Try Restoring rather than updating, and set up as a new phone, this will stop corrupt items such as plists being carried over. You can then choose to sync your itunes etc... thereafter. You will lose settings and SMS and similar stuff as you will not be using the backup but setting up as a new phone.

Nov 24, 2008 3:59 PM in response to Childerick

Here are some more threads that are about the same subject:
http://discussions.apple.com/thread.jspa?threadID=1796131
http://discussions.apple.com/thread.jspa?threadID=1797971&tstart=0

and here is another link to a forum that discuss the same problem:
http://forums.macrumors.com/showthread.php?t=605612

Utskeets

Level 1

0 points

Nov 24, 2008 4:00 PM in response to ldcjim

I have experienced the same problem. Drains really fast when you use any type of internet service. What is Apple planning to do about this? All was good until this last "fix". In addition the phone is not identifying my WiFi network now.

Nov 24, 2008 4:04 PM in response to Utskeets

I had a Wifi problem too. I simply turned the iphone flight setting on and then switched it off. When I switched it back on again, I turned back off the flight setting and there was my Wifi back on.
Hope this helps!

Nov 24, 2008 4:05 PM in response to ldcjim

DRAIN YOUR BATTERY ONCE A MONTH AND WHEN YOU UPGRADE SOFTWARE

The reason every body has problems is they have the push mail on. If you are lucky the max you will get is 2.5 hrs.

************** You have to drain the iphone battery dead so the battery counter resets to 0000 ***********

Do this once a month and you wouldn't have any problems. BTW make sure your brightness is set half way or so. You get 4.5-5 hrs use.

iPhone Update 2.2 Drastically Reduces Battery Life