I agree that auto-processor-scale on Linux is not great, but I have been able to get good battery life from Linux by using LXDE and keeping the processor on its

I agree that auto-processor-scale on Linux is not great, but I have been able to get good battery life from Linux by using LXDE and keeping the processor on its lowest setting at all times. (This may or may not result in unacceptable compilation times, etc, YMMV.)