Background task/app eating battery life away?

Checked a dozen blog/websites, handful of email, 15min of games, 30-45min phone calls. Email fetch was on 30min intervals. Auto lock 1min.
I got about
Usage: 3 Hours, 25 minutes
Standby: 23Hours, 10 minutes
~50% battery left
Listen to a few songs on the iphone in iPod mode. Press "Pause" button then sleep button at top then went to sleep. Woke up the next morning
I got about
Usage: 11 Hours, 31 minutes
Standby: 1 Day, 8 Hours
20% battery left (iphone warned be battery was low at 20%)
I don't get how my usage went from 3 Hours to 11 Hours, unless iPod in pause mode counts as a usage while i was sleeping. But i also pressed the sleep button to turn off the screen so whats going on? Ate like 30% of my battery or more.

I know 3g eats more power but that is not the problem I'm asking about.
50% battery life after 3hr usage & 23hr standby...
Left ipod mode on sleep for 8hrs. Battery dropped to 20%.
so it would seem that leaving ipod on pause for 8hours eat 30% battery life over 8hrs? I expect leaving iPod on standby to eat way less power than that.
maybe it is a bug? 8hrs on pause counts as 8hrs of usage? or maybe there was a background task eating battery away since the usage went from 3hrs to 11hrs over night.
Message was edited by: threeapple

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