Originally Posted by Viny

i havent used wifi since i got my device, about 2 weeks now and on moderate use, (some browsing, few calls, moderate text..etc) it lasts about 8-10 hrs.. on idle it lasts more.

Originally Posted by ysss

Just repeat the mantra that people have been saying...

"3G is a power killer"

It's eats thru your power more than 3x faster compared to EDGE/GPRS/WIFI.

Originally Posted by spousey

Hi, either all this information is misguided or 90% of n900 users have faulty units other than the wifi. I have had the 7 hour problem, since I have now tested it by doing the following-
uninstalled all apps
removed all widgets
deleted one desktop
disabled gps totally
not even tried to active any internet since switch on (so no wifi at all)
enabled gsm only, so 2g only
after this i have sent 40 sms, made one 15 minute call an thats all i did, it was totally idle an it still only lasted 16 hours, this is totally unacceptable (oh an have brand new sim card) and I want some-one to personally prove to me they are getting more than this cause i dont believe a word of it, that or like i said the majority are having problems so nokia have really screwed up an will receive alot comin back!!!! cause mine will be.

If I've offended anyone I apologise but after all the fuss of waiting three months for it I'm beside myself with it now that i dont believe that i have a device that it ment to be perminant 3g, perm gps an perm internet connection an theres just no chance at all less ye dont want a portable device ye just want a wire sticking out of it plaugged in all the time, whats the point?!?!?!?

Originally Posted by Phantasm

I have heard that some people have some problem with calendar widget using lots of battery. And some IM widgets also use much.

I myself have phone set to dual mode (stays on 3G at all times here), have bunch of widgets (calendar, media player, foreca weather and location) etc... GPS and GSM network location are enabled, but nothing should use those other than when I manually activate location widget or use some other program using location info. I do not have any IM widgets or anything that checks stuff from the net periodically. Foreca weather widget is set to update manually only (whenever data connection starts or I manually refresh it). I don't have much stuff on calendar though.

Anyway, other than the Wi-Fi bug, I do not experience any problems with battery life.

Originally Posted by REMFwhoopitydo

i took my n900 off charge at 8:30am, and connected to my company wifi at 9:30am.

i only have a 2G connection, but even so my battery is still at 80% by 14:30pm, despite being continuously connected to the wifi for five hours now.

Originally Posted by Phantasm

I suppose the worst efficiency on 3G is when there is some data going constantly but the amount of data is very small.

On other hand, while browsing for example, the time it takes to load a page on 3G is so much faster than on 2G that you might actually save power. Eg. 2 Mbps 3G and 0.2 Mbps 2G gives you 10 times the download time for a given page (assuming the server you download from is fast enough) on 2G. So, 10 times longer of moderate battery usage compares to short heavy battery usage. It would take more experimenting to know how it goes. And signal quality etc will matter of course.