I'm planning on buying a new 15" MacBook Pro and I'm deciding whether or not to stick with the default 5400 rpm drive, or to upgrade to the 7200 rpm drive. The performance boost is nice, but the main thing I'm wondering is does the 7200 rpm drive have a fairly large impact on battery life, or is the difference between the two drive speeds negligible?
I cannot comment specifically on the models that the Macbook Pro uses, but on standard laptops that I have upgraded, I have noticed that quite a few have incrased vibration and / or heat, but battery life is hardly changed at all.
If the Western Digital Specification is anything to go by, it looks like the 7200RPM drives use less power... I have no comment to say :S.
5 VDC Read/Write 500 mA Idle 400 mA Standby 50 mA Sleep 20 mA Power Dissipation Read/Write 2.50 Watts Idle 0.85 Watts Standby 0.25 Watts Sleep 0.10 Watts
5 VDC Read/Write 360 mA Idle 165 mA Standby 40 mA Sleep 40 mA Power Dissipation Read/Write 1.8 Watts Idle 0.83 Watts Standby 0.20 Watts Sleep 0.20 Watts