I have to say I am noticing an effect as well. On my previous N900 I had it on dual mode, even though I have at&t and no 3g, and I think that it's constantly looking for 3g is draining the battery some. Now on my replacement Im having great life. I also have no widgets other than Omweather set to update once daily, I have google chat setup and active all day, and im browsing heavily all day, refrshing facebook, lurking here, check various webmail accnts and I can go the full 8hrs of work with more than 50 percent life. I also have the wifi set low 10mw , and if I connect to wifi and disconnect I always reboot, not sure if every device has the wifi battery drain bug, but I reboot anyways to avoid this issue at least till the next fw update. Im only on two deep charges with this device too. It gets better after 4 or 5 supposedly. 3g is definitely a drain in my experience.