Has anyone else been having this problem since upgrading to a 4.0 jailbreak? I didn't install multitasking so it's not that, and I usually have my iPod in airplane mode. I turned off location services and my iPod only checks for mail when I enter the application. It was 95% charged today, I listened to some songs for a while in the car and it went down to 94%. I went to sleep when it was at 94% and when I woke up 5 hours later, it was out of batteries. I didn't have any application on or anything. Sometimes I leave the alarm clock on, but that didn't used to drain it so much. This has been happening a lot lately. I got my iPod a little over a year ago, but the top button was broken so I got it replaced a couple of months ago for free. I'm pretty sure that that warranty has run out, but I've only had it for a couple months!!