Man hearing this stories from the Charge I'm glad I never got one! My Incredible with a 1750 mah battery last me ~14 hours between charges. Everything on, but it's only 3G. (Don't have 4G here yet, booooo.) I would imagine the better screen and software should provide me with decent battery life. My Asus Transformer tablet has ~ the same stats as the GN, and it last a LONG time on battery. (Granted the battery is a lot bigger too.)
As long as I can stretch it to 8 hours, anything past that is gravy. Which even then it doesn't really matter since I'm always around a charging source somewhere.