SFletch:
This one can be used inside the car. Unless I'm missing something.
I think the 1 posted needs to be attached to battery via crocodile clips, I think

could be wrong?
But this 1 below with lower wattage ,which is fine to use for lappys etc inside car,as it has cigarette adapter,see piccy.
350 watt with 500 watt peak power.
Plugs directly into 12V car cigarette lighter socket.
Allows the use of domestic home appliances to be used outside.
Play stations, CD players, portable DVD, drills, tv, lap tops etc.
Also ideal for camping and caravans.
Power on the move
http://www.argos.co.uk/static/Produc...3EINVERTER.htm