I don't have anything most of us don't have on our ONE's. Gmail, Imap email account, Facebook, Backup to dropbox. Those are all I can think of that would sync in the morning. The battery has behaved like this ever since I got the phone. I remember the first morning after a full charge I looked at my phone and read through Google reader and surfed a few webpages before getting up and I freaked out because the battery had gone down to 96% in a matter of 30 minutes. By the end of the day though the phone had about 60% battery left still. Now I'm usually down to about 50% by the evening, or 30-40% if I'm in the office a lot where the reception is poor.