While I was making the phone call neither Edge nor 3G where activated. I.e. the battery consumption should be as low as possible.
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Is my iPhone4 battery draining too quickly?
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While I was making the phone call neither Edge nor 3G where activated. I.e. the battery consumption should be as low as possible.
The iPhone makes calls over the 3G, Edge, or GPRS networks. I'm guessing what you mean is that you didn't use the phone for any data while you were on the call. 3G talk time is less than that of calls made over the Edge network. Apple list the talk time for 3G as 7 hours, and Edge as 14 hours for the iPhone 4. Your phone definitely isn't achieving those numbers though.
One problem might be is that the proximity sensor on your phone isn't shutting off the screen while you're on a call. You can test it out while you're on a call to see if that is the case. Hopefully this issue will be fixed in the next iOS update. That may not be the case, and if not getting a replacement is your best bet.
That screen brightness is probably saving you a lot of battery power
Mine was at about 2/3 with the auto adjust on. I just set it to 1/2 with auto adjust off, because it would almost immediately brighten my display in a room with any light (even my CFL lit bedroom at night).
Hope your battery still holds up with the jailbreak
One problem might be is that the proximity sensor on your phone isn't shutting off the screen while you're on a call. You can test it out while you're on a call to see if that is the case. Hopefully this issue will be fixed in the next iOS update. That may not be the case, and if not getting a replacement is your best bet.
That screen brightness is probably saving you a lot of battery power
Mine was at about 2/3 with the auto adjust on. I just set it to 1/2 with auto adjust off, because it would almost immediately brighten my display in a room with any light (even my CFL lit bedroom at night).Hope your battery still holds up with the jailbreak
I don't think this is correct. There have been several times when I've seen processes running that are tied to apps in the multitask bar. Closing/quitting the app from the multitask bar will often end those active processes.
EDIT: Also, there is a fairly long, ongoing thread on this topic over at the apple forum.
I'm not confused on this I spelled it out clearly and linked to the iOS 4 developer page on how multitasking works. The iPhone may still register some apps in processes but they are just in a frozen state. Voip apps and gps apps are the only ones that can actually have endless processes in the background. Skype is always listening but uses less power then apples phone app. If gps is being used a purple arrow will appear in the bar next to the battery. It's important that this distinction be made because people don't need to waste time trying to get better battery life by "closing" apps that aren't using memory or processing power any more then an unopened file does on a hard drive. I really wish apple would disable the ability to clear out the recent apps tray. It gives the wrong impression and as Jobs said if you have a task manager you've failed. Well iPhones don't have that but it looks like it and now I'm wasting time trying to explain it so people can fix their phone. The fix is simple if your not getting an easy day of moderate to heavy use restore to new device and if that doesn't work take it back for an exchange.
Your optimism is wonderful, but several people have already done all of that and are still having battery problems. And while I'm sure you have accurately described the way background processes are intended to work, that doesn't jibe with what we've actually seen. Sometimes code doesn't actually work the way it was meant to, especially in an initial release such as iOS 4.0.
I did the same thing. I traded my first IP4 for a new one because I had one of those NOW stupid ghost shield's on it that apparently when put on, after they sprayed it down, eventually ruined a battery sensor. Not the point. Point is, with my new phone, I too, don't feel like the battery life is as good as my first. Standby is great. I can take it to work and leave it on standby for 8 straight hours, not checking it once, and I'll maybe have a voicemail, and a few txts and new emails, all unread/unheard, and my battery will be 100% after 8, almost 9 hours. But as soon as I start getting into all of that, I can watch my percentage drop at an alarming rate, at least to me. I will watch it drop a percent or two while responding to a txt. All of that being said, however, I've gone to bed without charging it overnight, and after a 14 hour day between work and home, it will usually sit between 87-90% approximately, and overnight, again, with a few new unread emails and txts, it will drop maybe 2% tops. Last night was one of those instances. I went to bed with it at say, 89%, and I woke up with 2 txts and it was at 87%. So from last night leaving around 630 at 100% to this morning around 9, with moderate txting last night, I dropped 13%. Idk. I think what someone else said is absolutely correct. I think the OCD is getting the better of us, me for sure. With all of these reports of battery issues and whatnot, and I'm still debating on if I take my IP4 into Apple again and see what they have to say, if anything. But after reading through different threads and posts, I think this is just normal use. For the most part. Some are defective, yes, but overall, I think turning off the % is the best thing to do, that way we will hopefully stop watching it obsessively. I know that I'm going to do that. I never gave much thought to my battery life before you could have the % notification. Now I can't even enjoy my phone like I should because I'm watching my battery more than what's on my actual screen. So IDK.
So if apps in the app switcher bar aren't backgrounding/multitasking, then why the hell when i've got Skype open in there and someone calls, it pops up with the call?? HM?.... i must be online... some of you are severely misinformed.
One thing I've noticed is that the iPhone 4 generally starts reducing the percentage/graphic immediately, whereas I could go 3-4 hours before I'd see any reduction in the battery meter for my 3G/3Gs. I'm wondering if that's what's worrying people...
With my 3Gs, I couldn't go two days without charging; my iPhone 4 allows me to go 2 days and some change, if I forget my charger for a weekend trip.
With my 3Gs, I couldn't go two days without charging; my iPhone 4 allows me to go 2 days and some change, if I forget my charger for a weekend trip.
Nope. YOU are misinformed. With iOS 4 Apple released to developers 7 services APIs that can be used in the background. As a developer, if you have the need to do something in the background (i.e your app is not the current active one), you can implement such a service. This is why after iOS 4 was released, Skype still wouldn't accept calls when it was closed (even though it was still in the switcher bar). Only when they implemented the VOIP backgrounding service and released an update, you could accept calls while in the background.
The switcher bar is a recents app switcher. It has nothing to do with backgrounding. Apps open from where you left off because iOS4 does this automatically for all apps when exited (freezes them and puts them to sleep). Only apps that explicitly implement a background service will actually run in the background.