My cheapo android phone from Virgin had an app installed by default (ICS) that lets you automate power control. My phone goes from 100% to 60% about twice as fa

My cheapo android phone from Virgin had an app installed by default (ICS) that lets you automate power control. My phone goes from 100% to 60% about twice as fast as 60% to 0%, because once it hits 60% it automatically dims the screen (unless you force it bright). And if you ever watch power consumption, by and far it's the screen that uses the most.