lol i think it all depends. You can probally do a quick charge which means it obv wont last as long, also it obv depends on how long the movie is. Also you can encode the vidoes is more fps n that, ive had the program to do it, because i was helping james, the lad, do them. So i think also if you have a huge file in mass detail it'd probally last less long, but i, would much rather have a psp, movie player, than a chunky ass ds. There both not bad tho.
You do have to consider it is only a hand held console, the battery cant last forever. Also, i suspect ul be able to buy liek battery packs.
Id recommend the psp, there nice.
I think the only advice i can say is if you prefere nintendo games go for ds n ps games go for psp lol, i think psp is more adult than ds.
Thats my 2pennith worth
Venney
fair enough 
