i am a newb when it comes to PSP so what is the 75% and 1/2 settings? can you change the amount of power to use like on a lap top, while you lose quality you gain battery life? and 2.5 hours is okay i suppose kinda low but then again you said you were watching a movie. and if batteries are only $30 it would not be a bad idea to pick up another one.
Think not disdainfully of death, but look on it with favor; for even death is one of the things that Nature wills.