iPhone 4 Overnight Battery Drain

[Mike5100]

Is it possible that wifi in your bedroom is weak and maybe the phone has to work hArd to use it
On a separate point. Double clicking the home button on my i4 does not show only running apps. It shows every app installed
Mike

 

[mkisawesome]

Sudden extreme loss of battery life in iPhone 4

Often applications fail proper installation and a process can hang, causuing repetitive instruction calls (even in standby). With such a process continuously running on your iPhone, the battery drain can be significant - up to 25% or more in an hour. Here are a few solutions that have worked for me (it's happened to me on three separate handsets of the iPhone):

1) Do a hard reset - Hold the home and sleep buttons down together for approximately 10 seconds until the phone turns off. Wait a few second, then repeat to turn it back on. THIS WILL NOT ERASE any of your data or lose any of your setting, rather just a flash memory reset.

2) If that does not solve the problem, follow this procedure:

1. Under Settings, go to Mail/Contacts/Calendar - tap the name of the
Exchange account. You will see 3 switches. Turn them off (repeat for
each account), then back out of Settings. Do not turn off PUSH; only turn
off the 3 switches. You may receive warning messages - go ahead and
accept these - this data will be restored from your accounts once the
switches are turned back on.

2. Open the apps one at a time, first Mail, then Contacts, then Calendar
so these apps apply the changes.

3. Hold the home button for a few seconds and close all multitasking apps,

4. Turn off your phone, wait a few seconds, then turn it back on,

5. Go back into Settings and turn the 3 switches back on.

Usually the hard reset will solve the problem on its own, but the mail reset may be necessary in cases where the mail application is causing the process error.

Good luck! 🙂

 

[Ed Td]

I just got the iphone 2 weeks ago. I noticed that when my iphone 4 is in standby mode, the battery seems like working as what Mr. Job says - it uses about 1% in 3 hours. But once I started to use the phone, either surfing web (3G or Wifi), checking email or just turn on to play some icons (look and close then), the battery drains like very fast. It use almost 1% every 1-2 minutes (never over 3 minutes). In this case, 2minutes x 100=200 minutes, that is only about 3 hours.
I have configured battery saving mode as per iphone suggestions - like turn of Push email, turn off GPS ....

Is it normal or there is problem with my iphone battery?

thanks.

No that's normal. My iPhone 4 is the same