I work in Detroit, at the RenCen. I noticed that my phone's power use it much higher when I am at work. I think it may be due to the close proximity of Windsor, Canada. For those of you not familiar with Detroit, the RenCen is right on the river, directly across from Canada. I have observed andywhere from 15% to 30% more battery draw than whne I am at home. Anyone else running into this? Is there a setting I should change to lessen this?