laptop question!?

[Kris.P]

hi guys!

im about to be getting onto a 10 hour bus journey and i am taking my hp pavilion laptop with me! i just want to know whether there is much difference between using the dvd drive to watch a film or just straight off my hard drive!

i really want the battery to last as long as possible!

thanks

Kris

[mrt9888]

The hard drive will use less.