When you say powerpack... do you mean pwoer supply? as in mains charger? or do you mean a portable pack, which takes standard cell batteries which charges your unit on the move?
Also i cant say unless i know the make of your laptop... You can get universal mains chargers for the laptops, but then some brands like HP have their funny little connector on which means you have to buy one of their power supplies.
If it is a battery pack... for a laptop theres this and others similar:
http://www.maplin.co.uk/module.aspx?...490&doy=search
Theres this if you want a laptop universal power supply:
http://www.maplin.co.uk/Module.aspx?...=43515&doy=2m2
Or theres this that will charge your ipod on the move from cell batteries again:
http://www.maplin.co.uk/Module.aspx?...=99334&doy=2m2
I can't find anything that will do both your laptop and ipod though, possibly if you gave the make of your laptop, might make it easier. In fairness you could build one if you were up to it