HELP! New IPhone 4 has 9 hours of standby time!

Question

I've had my iPhone 4 for three weeks. It usually gave me two days under light usage; now, all of a sudden, I only get about 9 hours. Of standby! I used battery doctor to fully charge last nite before I went to bed, and woke up with a 9%  charge, and confirmed that all 9.5 hours since the last charge was on standby. I had long ago done all the tricks:
Wi-Fi off
Notifications: on for just one app (and haven't changed this setting recently)
Brightness: about 60%
Bluetooth: off
Location: on, maps: on, all else off
Mail: FindmyIphone: on; Gmail: on (only mail); Exchange: all on, sync 3 days,
Fetch new dataff
Room temperatue: 78 degrees
Signal: 5 bars, 3G
# of free space: 13.5GB
Again, without touching the phone (100% standby), and all the above settings, and a full charge, it drained to 9% in just 9.5 hours. Interestingly, I've noticed this turn towards 0 battery life after I downloaded the Pandora app two days ago. I deleted it, but the problem remains. Also, when I scroll through my contacts list, for example, it is very choppy, like something is processing in the background...Please help before I dump this phone on a Verizon store counter....!
Thanks,
Roland

Answer 1

fossey2 wrote:
I've had my iPhone 4 for three weeks. It usually gave me two days under light usage; now, all of a sudden, I only get about 9 hours. Of standby! I used battery doctor to fully charge last nite before I went to bed, and woke up with a 9%  charge, and confirmed that all 9.5 hours since the last charge was on standby. I had long ago done all the tricks:
Wi-Fi off
Notifications: on for just one app (and haven't changed this setting recently)
Brightness: about 60%
Bluetooth: off
Location: on, maps: on, all else off
Mail: FindmyIphone: on; Gmail: on (only mail); Exchange: all on, sync 3 days,
Fetch new dataff
Room temperatue: 78 degrees
Signal: 5 bars, 3G
# of free space: 13.5GB
Again, without touching the phone (100% standby), and all the above settings, and a full charge, it drained to 9% in just 9.5 hours. Interestingly, I've noticed this turn towards 0 battery life after I downloaded the Pandora app two days ago. I deleted it, but the problem remains. Also, when I scroll through my contacts list, for example, it is very choppy, like something is processing in the background...Please help before I dump this phone on a Verizon store counter....!
Thanks,
Roland
I have an idea for what could be going on, do you close running apps after you are done with them?
Try this, double tap the home button (button with the white square), you should see a bar pop up at the bottom of the screen showing apps that are currently running in the background, hold down one of the apps until they begin to jiggle and you see a red dot on the upper left of the apps, now tap the red dot for the apps you are finished using (don't worry, it will not delete the app from your iPhone), I have noticed if I have less than 2 rows (8 apps, 4 apps per row) that my battery life seems to be pretty good, if I have more than 2 rows of apps running, then my battery tends to discharge much faster
What is happening is whenever you close out of an app, the app still runs in the background, allowing multitasking, the more apps you open in the background, the more apps you have that require processing power, the more prossing power, the more battery needs to be used, this is also why the iPhone may start to get slower the more apps you leave open, as they are competing for processing power, this is one of the reasons why Android phones are known to have such bad battery life, there is no active task manager on Android phones and therefore there is no way to close apps in the background and keep them closed (as the Android OS just wants to open them back up on it's own)