View Full Version : Battery Alarm Standby

18th August 2010, 10:54 PM

I been having an issue with my iPhone 4 and standby battery life when setting an alarm.


Got to bed at 12:30 --> set alarm for say 7:30am --> Phone battery at 100%

Wake up to alarm sound to find 15% battery remaining. Anyone had similar issues?

I have tried a restore as new and will be deleting the ispw file and restoring with a fresh dl'd copy.

This also was happening with 3GS prior to upgrade of handset...

18th August 2010, 11:54 PM
Calibrating your battery - see here (http://support.apple.com/kb/HT1476?viewlocale=en_US).

With external devices, I have found that using the Apple USB Power Adapter - click here to see the Apple Store (http://store.apple.com/au) and enter that product name into the search panel; is faster and far more efficient than charging from a computer's USB Port.

See Battery Charging tips. (http://www.apple.com/batteries/iphone.html)

And a further note on Lithium-ion Batteries (http://www.apple.com/batteries/).

Also remember that using Wifi and BlueTooth will drain the battery faster than having those options off.

19th August 2010, 03:07 PM
Yeah bluetooth is never on, and prior to 4.0.1 update on the 3GS standby would usually be about 2 days.

Seems weird that both the 3GS and 4 both have same problems. Right now stand by time is like 7 hours... (when alarm is set)

19th August 2010, 03:22 PM
An easy fix would be to put your iPhone into airplane mode.

Question though: are you setting the built in Apple alarm or one inside an app?

25th August 2010, 09:54 PM
Hey sorry for the late reply. Yeah i'm using the built in alarm clock and airplane mode would be a good idea, but I might have to call apple care because both my partners and brothers iPhone don't seem to replicate the issue. How about yours? If it's at 100% before bed time what % is it when you wake up?

25th August 2010, 10:01 PM
If I put mine into airplane mode at 100%, when I wake up it will be 96% or so.

25th August 2010, 11:46 PM
What about if you leave your network on?

26th August 2010, 12:11 AM
I have no idea...I'll try it out tonight

26th August 2010, 08:21 AM
I leave my wifi etc on (no Bluetooth though) and I generally crash at around 1am. I'd be lucky to lose 2% overnight no matter what charged state it is in.
I'd say there is something wrong...

26th August 2010, 11:23 AM
Left my wifi, cellular, bluetooth and push all turned on. 94% when I woke up. I think something is wrong with yours. I would try a hard reset (holding the home and lock buttons until the phone reboots itself)

26th August 2010, 02:49 PM
Are you making sure you close all apps that are running in Multitasking? that'll drain your battery real quick.
i only lose 2-4% overnight (7 hours)

26th August 2010, 10:21 PM
Are you making sure you close all apps that are running in Multitasking? that'll drain your battery real quick.
i only lose 2-4% overnight (7 hours)

Apps don't use any power in "Multitasking".

Unless they are streaming sound/music, are using voip (Skype) or for a few minutes to finish downloading or possibly location services (and you can tell if something is using location services IF there is the arrow icon).

Other than that ALL APPS go into a frozen state mode at best using NO power.

29th August 2010, 08:30 AM
Mine had the battery issue, fully charged but still drained over night. Had it replaced by Apple. The replacement one has amazing battery life, I have to recharge every second day.