iPhone Usage Up While Sleeping

[modit]

Somehow, my iPhone's battery went down from 49% to 42% and usage increased 32 minutes (3:13 to 3:45). I didn't plug it but it does have a passcode.

Why is my iPhone battery going down and usage is going up if I didn't use it? Is there an app that can show what time my iPhone was on?

Thank you!



EDIT: Here's some other people with the same issue...

I went from 100% to 1% in 11 hours 35 minutes standby. The phone suggests 6 hours 3 minutes usage, which is interesting considering I was asleep for 10 of those 11 hours.

Does 'usage' tick over with push email enabled?

I'll be doing the following test and will report back...

hi all
i have a problem since a month..

my iphone 4 while in standby continues working..

i have done a test,i put my iphone in airplane mode,wifi off,push off...
after 40minutes i get 40minutes of standby(this is ok ) and 10minutes of usage!!!why i get these 10minutes if i didn't use it?

i have just restored my iphone 4 as a new one but it didn't fix the problem!

this problem drains battery..


help