I went 11 hours today and went from 100% to 70% charge, use was minimal (less than 1 hr screen time on) and I had background data DISABLED, seemed to make a huge difference, whereas yesterday I went from 100% to 15% in 10 hours. Downside is you don't get e-mails and notifications other than texts.
Wow, I wouldn't be able to live without my data connection always on!
Today (my fourth day with the D3) has been my best day yet. The phone's been running off battery for almost 15 hours, and is reporting 20%. That's with me playing the NOVA demo (until it wouldn't let me play any more ;-), using Google Maps a little, IMing, emailing and a couple of short calls.
Maps 41%
Cell standby 17%
Wi-Fi 16%
Phone idle 14%
Android System 7%
Display 3% (amazing)
Android OS 2%
Pretty weird stats, especially considering my limited Maps usage. Yesterday this was probably true (used Maps a lot), but today it was brief...