Something like this may help out to power your device in the car. Check the power consumption of the Lexmark against the maximum supported. There are other options in inverters so I am sure you would find one to do the job.
Hope you have a big enough boot to store all this hardware in!
Bought a Nikkai 300W Invertor from Maplins yesterday. Does the job fantastically and not too expensive at 40 quid. An added bonus for me is that it will power the family's laptops with ease, a real boon on those long journeys.
Thanks again, you're stars.
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