My N9 just turned off, after 6 days and 4 hours off charger. Powersaving mode was on, no lpm, no double-tap to unlock (don't know if it affects battery life), I didn't connect to wifi or 3G, I did about 20-30 minutes of calls, about 10 sms, and otherwise used it normally. I didn't hesitate to unlock it to check the time, I used the alarms once or twice a day with the snooze function ringing at least twice.

In general, I used my N9 as a dumbphone. It is new, has very few contacts and messages and no music or videos for tracker or smartsearch to index.

I don't advocate of using the N9 in this way, I just wanted to test it versus a dumbphone assuming similar use (mostly to have an argument against people who favor dumbphones because their battery lasts a lot).

The result is that with the N9 you have the choice. If the battery life is critical once in a while you can manage.