Battery running down fast - iPhone not in standby??

[ramparts]

I just restored my iPhone because of a cover art issue, and that works fine but now the battery can't seem to stay put for more than a day or two. It charged down fast a couple of days ago, which was weird, so I ran it down and recharged overnight two nights ago. Yesterday I took it out of the USB in the morning and the battery seemed fine throughout the day, but then at night it started going down faster and was about halfway down by the time I went to sleep. When I woke up this morning (~8 hours later), it was at 10% remaining, and an hour later I had to plug it in because it wouldn't turn on.

When I checked the usage stats after waking up (when there was 10% left), it said it had been in use for something like 20 hours since the last full charge (and standby for a day and three hours, which was about how long it had been since I took it out of the charge).

There's no way I used my iPhone for 20 hours yesterday or even in the last few days. Something must be sucking up the battery. What could it be? Location services and 3G are off, I'm connected to WiFi and fetch mail every hour from one account but that's never done this before.

What could be sucking up my battery, and how do I find out?

[danny_w]

I just restored my iPhone because of a cover art issue, and that works fine but now the battery can't seem to stay put for more than a day or two. It charged down fast a couple of days ago, which was weird, so I ran it down and recharged overnight two nights ago. Yesterday I took it out of the USB in the morning and the battery seemed fine throughout the day, but then at night it started going down faster and was about halfway down by the time I went to sleep. When I woke up this morning (~8 hours later), it was at 10% remaining, and an hour later I had to plug it in because it wouldn't turn on.

When I checked the usage stats after waking up (when there was 10% left), it said it had been in use for something like 20 hours since the last full charge (and standby for a day and three hours, which was about how long it had been since I took it out of the charge).

There's no way I used my iPhone for 20 hours yesterday or even in the last few days. Something must be sucking up the battery. What could it be? Location services and 3G are off, I'm connected to WiFi and fetch mail every hour from one account but that's never done this before.

What could be sucking up my battery, and how do I find out?
Do you have push email or calendars enabled? Usage sounds about normal if so, which I think is ridiculous and why I don't use push.

[ramparts]

Nope, no Push.

I'm using the same settings as I have for the last month I've had this phone (since I bought it), but it's never sucked the battery this quickly or added time to my "usage" stats when the phone was clearly in standby. I think there's something funny going on in the background.

[gadgetdad]

Is your iPhone Jailbroken? Do you have Swirly MMS? I had a similar problem and I downloaded the demo version. I have since deleted the app and back to normal battery usage. Odd.

[ramparts]

No and no...

[ramparts]

Update: I turned my e-mail fetch from update every hour to manual update. That was never an issue before but at least now it's not showing the ridiculous usage stats I had before. I'll update when I see how the battery life lasts. It shouldn't be like that but at least it might be a solution...

[jmccullough108]

Update: I turned my e-mail fetch from update every hour to manual update. That was never an issue before but at least now it's not showing the ridiculous usage stats I had before. I'll update when I see how the battery life lasts. It shouldn't be like that but at least it might be a solution...

Turn the screen brightness down, that's a battery killer.

[PNutts]

I don't have a solution for you other that try a reset. The same thing happened to me a few days ago. Full charge at 10 PM and less than 20% at 6 AM. Full charge that morning and then less than 20% at 5 PM. I did a reset and the problem went away. I don't know what caused it.