The item in the link would probably do the job, as would an inverter, but both would be reliant on a good battery that holds its power. if you were going to use either device connected to a laptop while using for long periods, then the vehicle battery might suffer a loss, which could result in ignition and other device failures.

Used wisely, and you will most likely be okay. Make sure though that you have a protection device in whatever you use, in case of sudden power or voltage fluctuations.

We run my wife's 15.3" Sony Vaio on an inverter (150Watts) when on a camp site without electricity. But the power consumed includes charging the computer's internal battery so if you go this route you need to look its 240v external power supply. If it dosn't tell you the wattage then, multiply the lowest current figure by 240v to give you the Wattage for an inverter. for example the label may say 110-240v 1.0A-0.5A . In this case you would need an inverter capable of supplying 240*0.5 =120 Watt. Hope this helps.

Good, thanks for your feedback.