I have achieved 2 days of use without a recharge.

Battery life is not a problem exclusively with the N900 I have seen this with my N97 (NAM on AT&T). The scenario is that when on battery and WiFi is enabled the device chews a ton of battery. The N97 can drain a much larger battery in 3-4 hours if Gravity and ProfiMail are running. WiFi radios use a great deal of battery power.

The N900 is a sneaky bugger and will switch on WiFi without you realizing it!

The N900 has a sick WiFi setup. 1) It prefers WiFi to GPRS, so it automatically will switch you to WiFi. I have seen my N900 (NAM on T-Mo) switch from GPRS to unlocked WiFi networks while I drive down the street! 2) The WiFi Radio is hugely sensitive and powerful. I was freaked out when using Maps while driving I was stopped a a light about 800 meters from a mall and the N900 told me that I was logged into the WiFi network of the Panera restaurant in the mall???!!!, How crazy is that, my laptops don't have that kind of sensitivity/power.


We need to have a solution that allows us to turn WiFi on and off based on profiles. Several tools exist in the S60 space that allow this functionality. Some even automatically change profiles based on GPS coordinates, or cell tower ID ( Best GSM Navigator by Smartphoneware as an example). This would allow WiFi to be enabled at Home, but disabled in the car. Secondly the OS needs to manage WiFi better and turn WiFi off automatically when the apps widgets are not using WiFi.

Several suggestions:

On the support forum it has been posted that there might be a bug in PSM and moderate actually saves more battery then maximum.

I would also suggest turning on "always ask" in the internet connections section. This helps rouge jumping of WiFi networks.

lastly turn off WiFi when you aren't using it!