Question: Is there any way to underclock a P4 Laptop for the purpose of saving battery power? 

Answer: Over/under-clocking is rarely a simple task on a generic computer.  If it isn't done automatically and can't be done in the BIOS (watch as your laptop boots), I would't mess with it.\n\nNext time around, make sure you get a mobile processor in your laptop instead of a desktop replacement if battery life is a concern.
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