On this subject,

I'm a new N9 user and I've been casually monitoring battery performance for the past few days. It started off with a bag (36 hours on one charge), but as of yesterday it lasted less than 24hrs before going dead.

My situation: I use t-mo's unlimited data (prepaid) plan in the US, so my phone is always connected to mail, calendar, facebook, etc. Apart from tht maybe 1.5 hours of talk time at the max. I listen to some music, and hardly ever use Wifi. My auto internet connection is set to the t-mo data plan.

Today I changed settings for mail (gmail and one more), fb, calender (once a day syncing now), to much less frequent refreshing times (every 4 hours during peak time cuz I have my laptop on wifi), once daily for calendar sync etc. So, I'm hoping this at least gives me 24hrs for a full charge. Otherwise I'd be bummed...