Weighing up your chips

Although not widely known, the chip in your laptop has a lot to do with how much time online your battery will give you.

Here's a rundown of how some of the more popular chipsets compare.

1. Intel Pentium M (part of the Centrino package)

Without a doubt, the Pentium M is the battery-life champ. With 77 million transistors, a megabyte of Level 2 cache, and the ability to streamline operations, it balances ...