I took my iPhone 3G off the charger at 6:45am this morning when my alarm went off. I did not attach it to a computer or charger all day - first charge was to sync the screenshots. Usually, my phone is at 1/4 battery by 6:30PM when I get off work. I've been amazed all day and I am wondering if the battery meter is somehow not calibrated. But Saturday, as usual, the meter was at 1/4 remaining by 6:30PM and 20% warning by the time I plugged it in at night.
The settings today were:
WiFi: Off
3G: On
Location Services: Off
Push: On, without MobileMe setup
Bluetooth: Off
Brightness: Screenshot attached.
I turned WiFi off yesterday to check dslreports' 3G speed test in my house and forgot to turn it back on.
I always have 3G on, that's why I upgraded to the iPhone 3G. I am a service technician so I drive around San Diego all day. There are a few spots without 3G.
I turned location services off this morning before work because I still get asked if Apps can use my location with it on. I'm not sure what location services are actually used for if it's not a global authorization.
I haven't set up my MobileMe because of all the issues and the fact that I cant reply using my personal address. Therefore, I'm still using my Dreamhost email and checking manually, so I'm not sure if Push is really doing anything.
I've attached my screen brightness page. I didn't realize auto was off until I saw the screenshot. I thought auto-brightness was supposed to improve battery life anyway. I'll keep it off while I check my results tomorrow.
I don't know if something's wrong, but again I made a few changes recently (mentioned above) and my battery life has been amazing all day.
I turned WiFi back on this evening when I went to use Apple's Remote App, everything else will remain the same and I will see what happens tomorrow.
These results were crazy, so I want to verify tomorrow.
The settings tomorrow will be:
WiFi: On
3G: On
Location Services: Off
Push: On, without MobileMe setup
Bluetooth: Off
Brightness: Screenshot attached.