when u don't turn it on well hmm there isn't any "do this" sort of thing, but lcd's take up battery so use screen saver kind of thing on your mp3 player. and use the battery options on laptop. when u're on battery u can create profiles for your hardware and disable specific ones + u can set your services with that profile and disable the one's u'd not need when u're on battery.. as for mp3 player letting the player play songs 1 after the other is good, heh that sentence doesn't make sense. i mean if u press "next" all the time and skip too many music it'll eat up more battery, so i advice u to create a nice playlist and let the player run through it. and let the screen go blank at certain timeout. decrease the brightness of the laptops screen. slow the cpu, if u're not playing games decrease the battery usage of the graphics card, nvidia has this option, i dunno if ati has it.. alternatively u can use battery program from Dachshund soft. it's supposed to double the time of your battery, but i never managed to benchmark it, bc i use it differently everytime . that program slows down the hdd spin, cdrom spin, etc etc.. it sounds cool i dunno if it works:) check their website...