Here is an unscientific test I just ran...
I just took a look at the battery life on my phone and the battery life on my wife's phone. I turned both screens off for a half hour (exactly).
Her phone battery dropped 2% (from 95% to 93%) and mine dropped from 59% to 54%.
Now, the only applications I have downloaded on mine are Facebook, Foursquare, Kik, and Yahoo! Mail.
She has the same ones, except for Foursquare, but she has a few others. I just reset my phone this morning.
Now, how can mine have dropped about 2.5 times more battery life at the same time, in the same home (my WiFi on the phone was shut off - I think hers was on), with both screens off?
Is my battery bad?