i honesty think the old one is better even though the ram is bigger(faster loading time) and the screen is a bit brighter the slim psp has a really cheapy outside feeling.if it falls one time it will brake....and the umd slot is cheap....so the only diffrence that is a good one is the loading time and brightness becuase i rathier it being a bit fatter and heavier then looking like a peace of cheap plastic.

so i recomand buying the pat psp !!!!!!!!!!!!!!!!!!!!!!!!!!! and their are no deffirence between the batteries....they have the same playing time...................

CYAAAAAAAAAAAAAAA