There are many new products for the psp that add battery life. The nyko charger case adds an extra 5 hours i highly doubt anyone would ever watch 4 hours of movies on that tiny screen without taking a break. Plus it's really worth it if you think about. On a daily basis people would be playing games 3-4 hours, plus i would rather shell out an extra 250 dollars for a miniusb drive plus charger case to have 20+ gigs, instead of 200+ dollars for a 2 gig MS duo.