Correct, there is a difference between heavy usage and heavy data usage
Since the ios6 update battery life seems better on my 4S.
Haven't used the Mophie in almost 2 weeks.

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"What you hear in a great jazz band is the sound of democracy. “The jazz band works best when participation is shaped by intelligent communication.”
Harmony happens whenever different parts get to form a whole by means of congruity, concord, symetry, consistency, conformity, correspondence, agreement, accord, unity, consonance…….