What could be causing battery drainage on iPhone 4?

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nan

New Member
May 22, 2010
28
4
3
#1
My iPhone 4 is draining in 4 hours. Just started after updating new software. Don't know if it's a bad app or the software. Any ideas?



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nan

New Member
May 22, 2010
28
4
3
#3
It was fine till a couple of days ago. Did the update and updated a few apps and know I get less than 4 hours on a charge.


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Europa

Moderator
Senior Moderator
Dec 12, 2008
28,365
5,505
113
Utah
#7
And ISO 7.1


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You didn't describe your type of usage or mention how long it lasted before the update. That would be helpful.

I get close to six hours of internet usage. It's longer if it's just music or something less battery-intensive. However, that's a 5s with a battery that's only six months old. Your 4 might have an old battery that doesn't hold its charge as long anymore.
 

Ozzie5374

Contributor
Bronze
Nov 7, 2010
422
43
28
Country South Australia
#8
My iPhone 4 on 7.1 & JB has the same good battery life as ever. Updating did reset some settings so I guess you've done all the usual stuff like check screen brightness (which is the biggest drain-even a small change makes a difference to drainage), turn off wifi/bluetooth/push notification and reboot occasionally.
 

nan

New Member
May 22, 2010
28
4
3
#10
Going to purchase a new battery and see what happens. I turned everything off and left my phone for a couple of hours and my battery did a huge drain.


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Europa

Moderator
Senior Moderator
Dec 12, 2008
28,365
5,505
113
Utah
#12
Going to purchase a new battery and see what happens. I turned everything off and left my phone for a couple of hours and my battery did a huge drain.
Do a restore to factory settings first. Your battery was fine before the update so it's probably software-related.
 

Ledsteplin

Genius
Gold
Oct 29, 2013
4,791
979
113
65
Florence, AL
#13
Here's a battery drain test offered in a blog by former Genius Bar worker Scotty Lovelace.

Your Usage time should be accurate to how much you've used it since you took it off the charger.
So here's the test: write down your Usage and Standby time, press the sleep/wake button (or lock button, as some call it) to put the device to sleep, and set the device down for five minutes. When you come back, take note of the change in time. If your device is sleeping properly, then the Standby time should have increased by five minutes and your Usage time by <1 minute . If your Usage time rises by more than one minute, you have a drain problem. Something is keeping your device from sleeping properly, significantly shortening the time it will last.
 

nan

New Member
May 22, 2010
28
4
3
#14
Thanks for the info. I went to Apple. They tested my battery and said it was fine. We reset phone to original and then I reloaded the phone. It still is draining. If I go out for three hours with it in sleep it's dead?. I'm thinking to replace the battery and see what happens.


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RoofMonkey

Genius
Gold
Jun 21, 2010
8,856
2,047
113
Florida
#15
Thanks for the info. I went to Apple. They tested my battery and said it was fine. We reset phone to original and then I reloaded the phone. It still is draining. If I go out for three hours with it in sleep it's dead?. I'm thinking to replace the battery and see what happens.
If Apple tested the battery and said it was fine, it must be an app or something else causing the drain.
 
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