Prior to leaving my truck this morning I checked my email and put the Droid to sleep. 90& battery available. Left it in my truck all day.
Came back 9 hours later and the battery was stone cold dead.
I've been doing the same thing for two weeks and I typically have 80-90% battery available for the drive home.
Not sure what was different about today...other than not having a phone for the long, lonely drive home.
I've got GPS and Sych turned on...but they've been on every other day with no problem.