amps is easy to figure out. just figure out how many watts something pulls. lets say you had 20 watts being pulled. Your car is a 12 volt system, so 20w divided by 12v=1.6amps most laptops dont pull more than that. some laptop chargers are like 95 watts, and that is still only 7.9 amps
basically you are going to need an inverter to run your laptop anyways right? so just get like a 100-400w inverter and make sure is has a 15 or 20 amp fuse on it and you are good to go. fuse blows b4 doing any damage to your system. not a big deal because the power outlets are fused with a 20 amp fuse under the hood anyways. if they stop working just replace the fuse.
Ill be here all week
