So, I'm actually having pretty good battery life on my iPhone 3G. I took it off a full charge yesterday morning at about 9am and it's still going... infact I'm trying to drain it now by playing a movie at full brightness and it's still not dead. By comparison, I used the phone for about 1-1.5 hours of Pandora radio yesterday, taking some photos, texting a ton, using some apps and then standby until this morning... now 2 hours of full brightness movie and as soon as it finally dies, I'll plug it in and let it go to full charge. Question is... how long should I leave it charing? Can you calibrate the battery like you can with the MBP's? Thanks in advance!