Better off with Ipod and Freecharger
Too expensive, lack of power I suspect from the cheap alternator, if it is the same one I tested in Baylis's torches.
If you want to go the wind up route, get the more powerful Freeplay 'Freecharge' hand cranked charger in conjunction with the video Ipod or similar.
Please see my test page here.
http://www.gotwind.org/freeplay_energy.htm