MBP Unibody HD power consumption ?

[Blackfoot]

Hey folks,

does anybody know how much power the MBP Unibody's standard 5400 rpm HDD needs? I read that the Hitachi Travelstar 7200 I'd like to put in this laptop has a power consumption of roughly 3.2W, and since I use it for work outside, I really need maximum battery-efficiency.

Thanks

EDIT : Actually the official numbers say the Travelstar has an average read/write consumption of 2.3W ... which makes quite a difference

 

[Sun Baked]

Either some people have posted the HD part number here, or on the Unibody take-apart pages.