Pentium-M (aka centrino) is where it's at (Score 1)

If you are looking for long battery life, look into Pentium-M / Centrino laptops. Banias was an excellent chipset in that it brought both performance and power efficiancy to laptops at the same time. Now, the Dothan chipset seems to be doing it again. As far as brands/models... Intel Thinkpads are nice... some of the gateway models get excellent battery life as well. Personally, I use an ABS ZForce F2; which uses an aopen 1557g "barebook". I get an average of about 4 hours out of the battery... not shabby at all.