Using 12V DC to DC converter as iBook power supply in car

I've built a power distribution box for my 12 volt accessories in my car. I bought a Carnetix DC to DC converter to power my VGA touchscreen connected to my G4 1.42 ghz iBook. It can also provide stable 12 volt power for a laptop, with settings of 18, 19 or 20 volts.
Anyone know which voltage to set the converter at, or if this will even work? I've searched the forum, but I can't seem to find a clear indication of the voltage needed for the iBook.

Hi David,
Welcome to the Discussions.
The iBook power adapter has an output of 24v @ 1.875 amps. I think you would be better off using a 12v DC to 120v AC inverter along with the power adapter.
John

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Using 12V DC to DC converter as iBook power supply in car

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