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Battery life cut after 3.1.3 update on iPhone 3G

Ever since the update to 3.1.3, my battery life is about half. Last two days have had to charge halfway through the day.

Anyone else see issues with battery life, since update?

Macbook, iMac, iPhone 3G, Mac OS X (10.5.6), 4BG, 500GB

Posted on Feb 4, 2010 7:52 AM

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119 replies

Feb 4, 2010 8:33 AM in response to Yaxide

I haven't updated yet but IIRC the updated says it improves battery level accuracy. Maybe you need to let the iPhone measure your battery charge again. To do this completly drain the battery till the phone shuts itself down. Then do a full charge. Then use the phone till it's completly drained again & do another full charge. Hopefully this will reset the battery charge measurements.

Feb 4, 2010 9:01 AM in response to sschwar4

I am also having problems with battery life since upgrading my iPhone 3G from 3.1.2 to 3.1.3. I had no problem going a whole day with quite heavy usage on one charge before, however since updating the firmware it only lasts about 5 hours with NO use. My battery fully discharged last night and was fully charged this morning, but don't want to have to spend my evenings without a phone so need to charge it mid-day... not happy at all!

Feb 4, 2010 9:40 AM in response to Acijam

It's natural to assume that the problem is 3.1.3, but there are so few problem reports with this release (compared to other releases) that any problems are almost certainly with your phone rather than being a general problem of the release. Try the usual troubleshooting steps and at least one of them will likely fix the problem. These include recalibrating the battery gauge; rebooting; turning off any push accounts, rebooting, then turning them back on; closing Safari windows; reset network settings; Restore again; restore as a new phone.

To recalibrate the battery gauge run the battery down until the phone shuts off, then charge fully, for 4 hours if possible.

Feb 4, 2010 10:42 AM in response to Acijam

You don't want to install any apps initially as a diagnostic tool. If it still has a battery problem with no apps installed there's something seriously wrong with your phone (not 3.1.3). If you don't have a problem then you know that it is an app or corrupted settings. Once you have done the test without apps you can add them back and see which one (if any) is causing the problem.

Battery life cut after 3.1.3 update on iPhone 3G

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