From the start, notebook vendors have raced to speed up their notebooks but almost always at the expense of battery life: faster processors meant limited time away from an outlet. Thankfully, times change. Rather than throwing more megahertz at computing tasks, Intel's new Pentium M processor, which makes its long-awaited debut today, significantly increases notebook battery life. One notebook we tested--IBM's ThinkPad T40--hit the seven-hour mark.
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