Okay this has got to be the worst battery in the history of cell phones. I FULLY charged the battery before I left for dinner at 7:30pm EST tonight. BARELY used it the entire night but left 3G on and turned location services off. Wrote 1 email maybe 3 SMS messages and a note in the memo pad app. After dinner went to see a movie and just got home. It's not 12:05am EST (4:35 min since it was fully charged) and I got the 20% battery warning.
Now I know you're supposed to calibrate it over a few days but I know it won't make THAT big a difference. I didn't even make ONE phone call and the phone can't go 5 hours with 3G active!! Now I know some of you are going to say I'm exaggerating but I made sure to note the exact times bc I wanted to see how long it would last b/c I have been having these battery issues since I got it. I don't know what to do besides turn 3G off which I really don't want to do. I also live in Manhattan which is supposed to have great 3G service so it shouldn't be looking for signal too hard and wasting battery. This is sooo frustrating and disappointing. Is it possible I have a defective battery?
I'm having the exact same issue as you! I got the phone Friday, charged it up, used it on Saturday morning and it was dead by lunch time (about 4 hours). Then, I charged it over lunch (about 4 hours worth of charging) and it was dead after another 4 hours! Insanity! My original iPhone could get through at least 1.5 days and that's when I'm using it. I've barely touched the new one.
As a test, I charged it again overnight. I turned off WiFi, 3G, Push Exchange email, Location Services and turned the screen down. So far today, I have sent two SMS's and made one 45 second phone call. It's barely 8 hours since I took it off the charger and the phone is down to 20%. I'll be taking it back to the dealer tomorrow, I'm sure it's faulty.
Imagine how quickly the battery would drain if I actually used it!
Damo