HTC Eris :: Undervaluing / Battery Save Without CPU Killer

Ok, so im not really as concerned about overclocking the CPU, but since the phone is basically a computer. I am curious if anyone knows how to undervolt the CPU? This can easily be done on laptops with the help of apps like rightmark CPU. Basically you keep the clock speed the same (or overclock it) but you reduce the voltage at each cpu cycle. You do this on a laptop with an application such as rightmark and you continue to undervolt until your system crashes. Which basically means your CPU has become unstable. Then you raise the voltage a few notches back up to the point before the crash and run it for a few days.why would anyone care? Well the effect is you keep the same speed (or faster) BUT you use less energy.... which means longer battery times. I've undervalued the last 3 laptops I've had two half the voltage. Now my hunt begins for an undervolt app for Android. The semiconductor manufactures leave a "generic" setting. But, each piece of silicon is different, and came from relatively different parts of a wafer. So some parts can hold up to less voltage without becoming unstable. Hence why one cpu can be undervalued dramatically and others (of the exact same chip set) can barely get undervalued without crashing right away. This is why they leave it at a generic safer voltage.