I'm not feeling good about battery life at all!
From Apple's website:
Talk time: Up to 8 hours
Standby time: Up to 250 hours
Internet use: Up to 6 hours
Video playback: Up to 7 hours
Audio playback: Up to 24 hours
From my today: I fully charged my iPhone last night with the supplied wall charger.
4:12AM Best guess at when the full charge finished after being placed on the charger before midnight, while in airplane mode
7:38AM I pulled the phone off the charger for the first time today and I turned airplane mode off
Usage and standby said 3:26 and 3:26, assumedly my full charge ended at 4:12AM indicating a 4+ hour charge cycle time
12:48PM 20% Battery life left message came on
12:56PM 15% Battery life left message came on
01:18PM 10% Battery life left message came on
02:06PM iPhone died, approximately 6:26 after phone was lifted from the charger and airplane mode was turned on
Usage said 8:06, and Standby said 9:54
Standby appears to reflect the total minutes since the iPhone thinks it last received a full charge (regardless of other factors).
Usage appears to reflect the amount of time the iPhone was not showing a black display.
I was in my home Wi-Fi area all 8 clock hours.
I used one minute of phone time (1 brief call). I had no Bluetooth usage.
I used email on a number of different email accounts with 15 minute cycles and forced receives and IMAP received messages.
I read blogs a fair amount of the time (not really intensive communicating activities) with minor additional browsing.
Conclusions: Steve Jobs would say 8:06 of usage is GREAT! But in real life, I am afraid that without mid-day battery charging (often impossible for me), that my phone will not even last a full business day (with lunch) before it dies, and it certainly won't run reliably into the evening for an evening out. It will have to be recharged EVERY night, with some cradle charging during the day to make even that work.
Secondary conclusion: When traveling, I often use my phone continuously while sitting in an airport and on the plane before take-off. With two regular layovers or long layovers, I might actually use all of my battery life before landing at home, and then have no juice left to call my ride or otherwise make my presence known. That is without using my phone as an iPod.
Tertiary conclusion: If you are a regular iPod listener as well as using your iPhone for every day use, you will likely use up your battery in less than eight hours - a full business day every time. If you don't sit at a desk plugged in for two plus hours, you will be sorely disappointed every day when your phone stops working due to your earlier tune listening.
What conclusions do you draw from my usage and limited battery life?