ok...i've given up on a refurbed laptop. mostly because of the added cost of the battery. for $200 more i get can get a new one.

here's where i'm stuck...

i know the centrinos give better battery life but the centrino seems to be more of a reference to the underlying technology than the processor used.

so which has the best battery life?

amd mobile athlon
intel celeron M
intel P4 (i know it's not the best but had to add it)
intel mobile P4
intel pentium M
amd sempron

the one i want is a sony with a pentium M but i'm having a hard time justifying the extra cost of the centrino chip.