T61p Freezes Only When On Bat Power

Jeff9

Distinguished
Jul 11, 2008
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My T61p freezes almost everytime it is run off battery power. It USUALLY, not always occurrs when I am loading something. This leads me to believe that it freezes when the CPU is in demand. I have the system undervolted via RM Clock. I would typically believe this to be the culprit but it has never frozen when on AC power. I checked and the profiles for the undervolt settings are the same when off and on battery power, so I'm almost positive that undervolting is not the issue. Any other ideas?

Jeff