Alright, so I ran the same exact test with the battery that Apple writes on their website: And my phone played video for 4.5 hours before it died. Their site said I should get 7 hours under those conditions. Should I request another replacement? I just got my first one swapped out last week for a new one with battery issues, and after running through this one for 4 cycles, it's still draining. Yesterday, it ran down to 20% with 1 hour of iPod use, 1 hour of phone calls, and some minor internet use. I had 3G on, Location Services off, Wifi off, and Bluetooth off. The battery on this phone has been somewhat better than my last, but it still isn't what it was on my first gen iPhone. Note: before I did this test on the phone, I let the battery drain till it died and charged it up from the wall rather than USB for the entire night and unplugged it in the morning.