So if the stock battery last 8hrs for me every day normal usage and this new one last 2x or 3x longer, then it's reasonable to say the capacity is as good as advertise which is 2050mAh.
Does anyone know if the charger can be set to charge higher than 1280mAh? I have a new 2450mAh battery, and have to use an external charger, the N900 charger stops the charge half way.