I have a macbook and I get about 2 hours of battery life. 
When my battery is fully charged, I unplug the adapter and (after 1 min)
I read :

[EMAIL PROTECTED]:# cat /proc/acpi/battery/BAT0/state  |grep remaining
remaining capacity:      38420 mWh

then I try idling with lowest backlight setting, hdd power down, no mp3
playing, just wifi and bluetooth on. And i get 

[EMAIL PROTECTED]:# cat /proc/acpi/battery/BAT0/state  | grep "present rate"
present rate:            17893 mW

As you can see 38/18 -> 2 hours and some mins.

Compared to OSX the battery should be charged to 50 W, not only 38 W.
And minimum power discharge rate should be about 13 W, against 18W.

I'd like to know about your parameters (measured as I did) and battery
life.


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