So it all started out with me being EXTREMELY annoyed of my 3Gs battery, compared to my wonderful 3G battery. I don't use 3g, GPS, or push email, unless I REALLY have to, which doesnt happen everyday. So in my 3g, i can be at 90% after close to 2 hours of actual usage.. (web/text/call) My 3gS, would be close to 75% after 2 hours of the same type of usage. I then restored my 3gS, activated it, took the simcard out, and let it sit for 20 hours.. (it was charged to 100%) and at the end of 20 hours, it was at 52%. WITH NO SIM CARD INSERTED. Similar test with my 3G---> 20 hours = 94% battery left. Explain this?