Look at this thread. Those info might be exactly what can be used with the widget I mentioned!!

Desktop Command Execution Widget
http://talk.maemo.org/showthread.php?t=39177

has been discussed in many threads.==> click here for reference
With a widget to show the percentage Ive noticed this every time. The battery never reaches 100%

is there already a bug raised ?

I'd prefer if it was left the way it is. Or possibly recalibrate the battery capacity making 98% the new 100% instead of just using the capacity supplied by the battery at bootttime, which seems to varry from boot to boot, probably due to temperature.

N8x0 always reports 100%, remaining millamphours = battery's original capacity, and the meter thus gets progressively worse as battery ages and loses capacity.

Yes a bug has been raised and it is not a bug... See https://bugs.maemo.org/show_bug.cgi?id=7636#c16

As a summary battery charge percentage is current capacity divided by DESIGN capacity. Thus it is a feature it never reaches 100 %. Instead, a new battery at 60 % will last as long as say a 2 years old battery that can only reach 60 % at full charge lasts from that.

yes I had raised that bug
anyways, i wasnt fully convinced with that bug resolution, will be getting back on that with more info when I have to reopen.
Any *fairly new" phone on the market always reports 100% battery and I dont believe that other OS'es extrapolate the value to display 100%.
All facts stated abt a lithium battery in that bug holds good for even other phones not only the N900 so that explanation didnt convince me fully.

Most devices (laptops and phones) calibrate the battery capacity again with every full cycle. And they are made to show the battery as 100 % when it is full, no matter what is the wear level of the battery. On laptops you can typically see the current fully charged capacity and design capacity. And thus see the wear of the battery. Still it is displayed as 100 % when fully charged no matter the wear.

N900 doesn't do it the same way. Yes, it calibrates the capacity every full cycle, but it doesn't use the capacity for calculating the percentage. It is only used in calculating the mAh of the current charge. Eg. on a full charge, you'll get the mAh of fully charged battery based on latest capacity calibration. Then the mAh the device sees you having will be divided by design capacity and you get current charge percentage.

It is a feature and not a bug and there is no way around it whatsoever.

If you have something regarding some people having problem with the new phone battery rarely having figures in the order of 70 % or even lower when fully charged, then that is case for another bug report regarding that problem. It is no use reopening the old bug report for a whole different problem, as the bug report only deals with the specific problem it is about.