I just downloaded SetCPU App, but I'm a little confused about how to use it to save battery. I want to use the app to lower the clock speed to very low while the screen is off. When I go under profiles and select the "screen off" profile, do I need to then set the clock speed down low or will it do it for me? Also from the main screen do I need to change the clock speed when setting it at conservative, low ect? Can someone explain how to effectively use the app to increase battery life! Thanks!