"It's no use having 9hrs battery life if your CPU runs at 800Mhz."
800MHz would be more than enough processing power for most things I do. Just about virtually everything we do now, we were doing when 400MHz Celerons existed.
I have purposely configured my laptop with a maximum cpu performance target of 30% when on battery. No more fan noise, much longer battery life, performance difference is barely noticable (except in tasks like gaming and video transcoding which I don't do on battery)
