There seems to be a large discrepancy for user's listed times for maximum usage on a full charge. Pre-jailbreak I was getting 4 to 4.5 hrs on Safari, now I get about 3 hrs if I'm lucky (1.1.1). Categories for each of the available firmware version are: 1 to 2 hrs 2 to 3 hrs 3 to 4 hrs 4 to 5 hrs over 5 hrs I've set out some ground rules (if possible) for submissions to this poll based on the following criteria: 1.Stated time is categorized for 1.1.1 and 1.1.2 firmware. 2.While not being used predominantly as a musicplayer. 3.All unused applications are fully disabled at the time of exit (press and hold the home button until the home screen appears). 4.SSH/OpenSSH is off. 5.(Optional) Use Skylar's/Erica Sadun's Preferences app to monitor time used for an easy and accurate measurement. 6.Brightness is set to less than 50% 7.Shut off to sleep mode not full shutdown. 8.First prompt of a 20% battery level reached is ignored. Total time of use is established at the initial indication of a 10% battery level being reached.