4.0.2 guzzling my battery. Your's too?

the percentage does go down of course whilst in standby, but not as much or as quickly as mine used to when using 4.0.1. I must say that when i was running 4.0.1 i was less than impressed with the battery life. I turn all my apps off after using them so none are running in the background, my 3G is turned off as i dont live in a 3g area and i only turn the wifi on when using it. And yet my battery needed to be charged everyday. Yet after updating today, my phone sat in standby for a few hours and hadnt lost a percent - then i turned the wifi on, used twitter, checked email, played some games and the battery had only go down 1 percent. Yesterday this would have sucked atleast 5-7 percent. I have noticed that some other users on this forum have noticed battery life improvement so i know its not just me imagining it =)

If i notice anything else everyone on here will be the first to know =)

Greetings,

If anything, my run time has improved, but maybe just a little - I'd notice it as I'm a heavy phone user. This update wasn't about battery issues, but as with any update, regardless of it's intent, will often have an effect on other functions. I'd say my phone is a bit more responsive, but that could be an illusion.

At any rate, the phone performs pretty much flawlessly as always. This phone is my organizer, as well as a simple phone - I'd be lost without it, at work, as well as home.

Cheers,
M.
****

After seeing this, maybe the 4.1 update is the way to go according to Wikipedia's OS breakdown which mentions +Improved Battery life across the board+ and +Improved Battery performance will be more noticeable in the iPhone 4+.

Of course I am not a developer so I can't be held responsible for spoilers 🙂

http://en.wikipedia.org/wiki/IOSversionhistory

i too had this same error when i tried to update to 4.0.2

If you haven't got it working yet - connect your iPhone to iTunes again, and do a full restore. This fixed the issue for me.

I have a guess that some of these battery issues could be explained by a runaway process eating battery and CPU. There might be more than one possibility, but in my case, I saw a big improvement by turning off mail:



Settings -> Mail, Contacts, Calendars -> Mail Account -> Mail = Off

This made such a big improvement that I think there was some sort of mail process continually running. But sadly I had to turn mail back on, for obvious reasons.

Other cases might be caused by other runaway processes.

Yeah, I noticed it too... my battery life dropped from 100% to 58% in less than 3 hours. Haven't really used the phone that much. Yesterday before the update, I didn't reach 60% until about 5 hours of heavy 3G websurfing and playing a few games.

As I'm typing this, I'm literally watching the battery life drop while the phone is just sitting there doing nothing. I shut down all the apps in the multi-tasking bar to see if it stops and I restarted the phone, but it's most definitely eating battery life faster than before.

Just updating that my battery life has definately improved since updating to 4.0.2. I use my phone the same amount and as previously mentioned I don't let apps run in back ground or have 3G or wifi on when not in use and 4.0.1 sucked my battery life. 4.0.2 is so much better and after more than 24 hrs after updating I can't believe how much better the battery is. Also my partner has noticed his battery life has improved aswell. Don't know wat to say but the new update works for me 

media360degree wrote:
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I will surely be looking forward to 4.1 but would also love to know what my fellow iP4 users are experiencing with the updates happening every now and then.

I have two iPhone 4 units. One I use and one my wife uses. We have had no battery issues on 4.0, 4.0.1, or 4.0.2. Battery life is much better than on my 3GS and a somewhat better than hers was on her old 3G.