iPhone OS 3.1 Battery Problems
There have been a number of reports of iPhone users experiencing battery problems since the latest iPhone update, iPhone OS 3.1, with lots of users reporting the problem on the Apple Discussions forum.
Some users have reported that the battery seems to last about 25% less, than with iPhone OS 3.0, and some are even reporting that the iPhone is using as much as 10 to 15% of the battery power for every hour it is in standby mode.

It looks like Apple [AAPL} are taking this problem seriously, and their support team has been in contact with customers who have had the problem, and they are asking customer to enable a battery life logging tool, to monitor the battery usage.
Personally, I have noticed the problem on my iPhone since the update, and the battery at the end of the day is definitely around 25% less than before I upgraded to iPhone OS 3.1.
We would be interested to hear from any of our readers who have had a similar problem, to find out how widespread the problem is.
via Cnet
Update 22nd January 2010
Details have been leaked of the latest version of Apple’s iPhone OS 4.0, you can find out more at the following link.









September 22nd, 2009 at 4:10 pm
Very interesting since I seem to be experiencing the opposite effect with my iPhone. My phone’s battery lasts distinctly longer. Although of course I am not sure if it has to do with the update.
September 22nd, 2009 at 4:18 pm
I didn’t realize it was happening until I read this post…now that you mention it, hah hah.
September 22nd, 2009 at 5:34 pm
since i updated my phone last night, it has been shutting off constantly if i am texting someone. I did not have the problem until i plugged my phone in last night to update it
September 22nd, 2009 at 9:56 pm
I agreed with Drake, not so much battery issues as the phone either locking up or indiscriminately shutting off.
September 23rd, 2009 at 10:27 am
I have the same problem ..
Now, I need to recharge it everyday ..
September 24th, 2009 at 9:31 am
I too need to recharge everyday after moderate email/internet use.
September 25th, 2009 at 6:05 pm
My phone started having very noticable battery life impacts after the update. Starting this last weekend it now is horrible. I load a couple of web pages and check a few emails and the battery drains up to 10% at a time. Doing very minimal activity and my phone drains completely within a couple of hours. It dropped 20% sitting in my shirt pocket on standby mode on the 20 minute drive to work.
September 25th, 2009 at 10:57 pm
I haven’t upgraded yet, have a 3G… Seems that what I’ve read about it that it’s mainly affecting people with the 3GS… so I’m curious if it’s also affecting the 3G? Anyone have any ideas?
September 26th, 2009 at 6:27 am
Hi Bubbsdaddy
It seems to he happening on the 3G as well, the Mrs has one and she has noticed a difference since the update.
November 10th, 2009 at 8:46 am
i am from india and i am also experiencing problem of less battey life when i updated it to os 3.0 .will anyone please tell me how to increase battery life