So I got the extended battery at the same time I got my Bionic. I've heard through random places that the battery usually lasts about 34-36 hours with moderate use. So, I play Surviving High school for an hour and a half, and it goes down from 70% to 20%. Is that common with the extended battery? The Verizon store told me it was normal, but that still seems like a large amount of battery life.