iPad 2 Battery life drains faster after iOS 5.0.1 update

I have noted that the battery drains faster than usual on my iPad 2 since upgrading from iOS 5.0 to 5.0.1. The battery life was lasting up to a week, but now it goes down 1% every 5 minutes of casual use.Then I try turning off push for mail/calendars/contacts, turning off Bluetooth, disabling service locations and iTunes sync, but no avail. I don't think iOS 5.0.1 has fixed battery life issue. I