Well that really depends on your use case Cord. I am saying if a person wanted MAXIMUM battery they would use the frequency that used the least voltage (obviously if you take that maxim to its logical conclusion the voltage be zero and the device would be off!). I was merely pointing out that there is quite a significant step between 250->600 and 600->750. The amount of extra power required to run the CPU from 600->750 is that voltage differance squared (times by itself) so big steps = even bigger increase in power requirements. From the graph you can see that the voltage step between 250->600 is not so big therefore it doesn't require that much more power.

The point is it is a trade off between power and frequency here and the most bang for your buck is at 600MHz.

The reason for removing unneeded frequencies is because it takes CPU time to check if a change is needed, then even more time to enact this change. From the graph we can see there is not really too much difference in voltage between 250->600 so why not just spank it all the way strait to 600?

I run my device at 805MHz as I am prepared to take a mild hit in battery life for the sake of performance.

Morphine ay? You either like to get REALLY high or...well you fight it.