I've got mine upto around 18 hours!!

• Moved the facebook widget off the homescreen
• Set brightness to level 3
• When at home on WiFi I switch off the cell and use tablet mode
• Switch off Bluetooth when not in use.
• At night in bed I use brightness 1
• I have an external GPS on bluetooth - more accurate and doesn't eat the phone battery.

I am using this a lot, playing with apps, downloading and updating things all the time, surfing, etc. etc.

Granted I'm not using the phone too much, but I do a lot of SMS.

Fully charged at 8am, it will be down to 20% by 10pm.

The facebook widget was the big battery killer for me.

"an hour of im"? You mean you set yourself offline after an hour? does that even work?

lol indeed it's not a bad thing... don't think my diamond lasted anwhere near that long, also didn't get hot at all like that used to.
think maybe a dc-11 type thing might be needed for when i'm away from a plug for longer.

"an hour of im"? You mean you set yourself offline after an hour? does that even work?

how did you mabge to post the same message 10minutes apart form each other?

my bat last from about 10-12 hours. some times its less sometimes its more depending on my use. i did find the first day of use the battery went in a few hours. this disappointed me but then improved say after day

I got increase from 10-15H to 30H just executing two commands in root shell:

echo "1" >/sys/power/sr_vdd2_autocomp
echo "1" >/sys/power/sr_vdd1_autocomp

Interesting, it looks like sequence has matter - I tried it in past but started from last week I occasionally set /sys/power/sr_vdd2_autocomp first, before /sys/power/sr_vdd1_autocomp and it produces this dramatic improvement. The setting sr_vdd1_autocomp first improves only around 30%.

I test it around 1.5 week and it created me now some (pleasant) problem - in the morning (after 24H) the battery still keep around 1/2charge now and I need to bring a charger to work or recharge it anyway. I hesitate to recharge it in 1/2 capacity ... just knowing the battery lasts longer if it is recharged after it comes red status...

Disclaimer: this trick may cause your N900 unexpected crash and reboot - it is not debugged well yet by Nokia. But try it and if it doesn't - you can be pleased.

mine lasted with more than 8 hrs.. with wifi enabled all the time, widgets running(facebook, foreca, and etc) played angry birds too( finished all the levels now =]) listened to radio and did web browsing..

Im just curious why on other ppl, the battery life doesn't last for more than 5 hrs even they are saying that they dn't even use it.. hmm... well, im lucky..

Another trick - keep one of four screens empty and keep phone on it while you don't use foreca, facebook etc. Because then you unlock the phone any widget on active screen starts working and some of them (like foreca) communicates via Internet and that consumes your battery.

EDIT: and if you use magnetic case (like me) then magnet may occasionaly switch the keyboard switcher while N900 is in case and phone think that you open KBD.

I've found that the worst thing I can do for battery life is constantly moving in and out of wifi range. If I stay on GSM, battery life is pretty decent. If I mostly stay on WiFi, it's even better. This is without turning either of the radios off entirely.

When I was working in a warehouse that only had wifi coverage to about half of the place last week, I'd be switching back and forth 20 times a day, if not more. I'd get about 20 hours out of it, with pretty light usage. It was pretty much dead by the time I got back to my hotel room with only 20 or 30 minutes of talking and 10 minutes of web browsing and 10 minutes of IMing.

When I got back home, where I'm on WiFi almost all day, I left it off the charger for over 30 hours before it started complaining of low battery, but that was also with light usage. Maybe an hour of calling, a bit of emailing, a few text messages, and a bit of IMing. I can usually get 16-20 hours out of it with more normal usage when I'm on WiFi all day.

I only have the calendar and several contact widgets on the home screen I normally leave active.

So what does it do exactly?