|
I use a generic DC-DC laptop power supply that allows you to select the output voltage. So long as you're very c-a-r-e-f-u-l in setting this you should be fine.
Converting from DC to AC back to DC is very inefficient, and inefficiency is probably something you would need to be concerned about if you're going to use your laptop for any length of time with your engine off... you might find your car doesn't start. :D
|