Wow I couldn't even get close to that. so I assume no wifi browsing whatsoever?
do you put it in offline mode when you go to bed?

I wonder what my issue is.
How much can an old sim affect the battery life?

my battery life significantly improved the last couple days

So right now i'm a little bit impressed of mine.
Charged it till 0800am yesterday;
Only use 2g; connection: Allways ask; no use of wifi; no vibration by touching the screen;
brigthness: first 2 bars;
did some websurfing ~ 1h; some calls ~1h; and some shortmessages;
no email sync (exchange 2003 ); no active widgets;
And the usuall demonstrating of bounce to friends

so after 30hours i have 47% left.

I turned my Im status to offline. This increased my battery life dramatically.

It seems that anything that uses even a little bit of 3g kills the battery.

I've had my phone 5 days and I can take it off charge first thing in the morning and go until bedtime the following day. Usage = constant 3g (not internet connected), a tiny bit of Wifi (set to always ask) no widgets other than OMWeather, probably an hours worth of browsing with prompted 3G connection, a good batch of SMS and a few calls etc.
I've just turned off touch vibrate but don't expect it to make that much difference, and I have screen on 4/5 bars because, well, screw having to get the phone right under my nose every time I check it just to save a little bit of battery
I'd really like to squeeze more life out of it though if possible.

I hear this wifi bug can be a killer and although I don't seem to have it, I'm concerned that when I hit the Web app for a quick email update or facebook check, it always searches wifi networks- does this mean it is constantly aware on wireless? Surely that's a big drain; is there some way to turn this FULLY off until I decide to manually connect when I really need decent data rates?