from website from post above:

There’s probably a few hour error margin on those tests, so basically the battery lasted roughly a bit over 90 hours in both tests.

so Total idle is 90 hours of standby. that is 4 days almost.

and when you use apps, it instantly becomes 6-8 hours? say 9 hours that is 10%

so it uses 10 times as much power when apps are on.. ? :S

what the -alienspaceship-

i dont get it. that cant be.

It can be. The OMAP3 goes into an extremely low power mode when it can, where it basically consumes no power. This is why optimization and testing is important--a phone spending most of its time doing nothing, and a few seconds crunching everything it needs to, is a phone with a long battery life.

Most people aren't really familiar with this kind of behaviour in a mobile device (at least not to this degree), so i see over and over here that something that wakes the phone a lot causes much shorter battery life. It's not really a surprise, but until people get used to the idea, they're going to be surprised by it.

Moar Battery!!

ye. the battery is pritty bad. i have had the device for 3 weeks now and it still is not even close to my n82. i disable the internet connection all the time. i dont have 3g running all the time. i dont have the face book widget running at all.

like yesterday this is what i did.
surfed the net for 45minutes.
took 5 photos.
recorded 1 minute of video.
played with the phone on the train for 1 hour.
turned off 3g so it was on 2g most of the day.
and the internet was disconnected the whole time beside that 45min

after all this i only got 13 hours till it was dead from 100%.

my n82 could beat that.


why doesnt nokia use those advanced battery i have been hearing about for years. like the 15min charge batterys or the ones that last for a week before a charge.

Ok, i'll bite.

The 15 minute (or 5, even) charge lithium batteries use a different chemistry that sacrifices capacity for power density, so that is not really what i want to see in my phone. It's great for making battery-powered motorcycles that burn up their motors and set speed records, though.

Lithium rechargeable batteries of one type or another are by far the most effective on an energy density basis, and not too bad on a power density basis either. Essentially the only way to get higher density than by using the extremely lightweight lithium atom (remember, it's element 3 on the periodic table, so you get lots of atoms (and electrons) per gram) is to use hydrogen (atomic number 1). Hydrogen isn't a nice compact solid like lithium, so until someone actually demonstrates a carbon nanotube adsorption approach that works at a commodity level, you have to use a form of it that is combined with carbon and maybe oxygen (an alcohol), and that means a fuel cell. Fuel cells aren't really appropriate for phone use, especially not the kind that can be made today.

In short, there are no rechargeable batteries that will last a week at the power draw of the N900. So what battery would you like Nokia to use?

Fortunately, we could make an effort as a community to isolate and eliminate the inefficiencies in the software to a degree never before done on a pocket computer. That's where we can make improvements. Figure out what really hurts your battery life and help work with devs to fix what can be fixed.

nice response gotta hand it to ya. ye your right 100%

After the second week of usage I must confirm that my N900 (and from the posts I've read some other too) will occasionally have an issue with the wifi connection. It looks like the Wifi module/service hangs and will not find any Wifi spot until it gets reboot. And I would guess the wifi hangs in an "always on" condition as this will casue the battery to drain VERY quickly (4.5 hours with a full battery).

I haven't been able to reproduce the issue, it seems to happen randomly... When I see the battery drain too fast, I check wifi connection and see it does not pick up my wifi router (nor the others that are in the area), If I reboot everything returns normal, and fsat battery drain stops.

Is there a way to check wifi service/module status through xterm commands?

I will try posting this also on Nokia Support Discussions.

To increase energy & power density - that is, energy & power in a fixed volume - the problem isn't weight.

The lightweight property of lithium atoms is irrelevant to that.

Your description works very well when you desire the best energy-to-weight ratio, but I think I wouldn't mind if the N900's battery were twice as heavy, if it lasted twice as long.

Good lord I would - Its quite heavy as is. The problem that all tech devices have is that battery tech is lagging far behind device tech. The demands for power have increased exponentially while the ability for the battery to supply that demand has not kept pace. Lets not forget it wasnt that long ago that NiCad batteries were the best we could manage.

try to disable GPS setting/location/gps---disable