2 old 4 this

I'm expecting to go on a long haul flight to NZ next year. Are there any 'powerpack' devices to extend the playback of the NW-A806 whislt travelling? Or as mentioned a mains charger of some description? Any suggestion as to best place to buy one of these without it blowing up 'cause it's a cheap/nasty unit? thanks. ps Still highly unimpressed with the Atrac avi to video transfer times, 4 hours+ for a 50 minute program- its a joke!

Hmm, Can anyone explain to me as to why the transfer times of AVI to Atrac files are sooo slow? A 50 minutes tv program has taken over 7 hours ( yes really) to transfer as an AVI file via Image converter 3 onto my Walkman( NW-A806). If this wasn't given to me as a gift I'd have sold it for something much better. Even a 5 minute music video took over 55 minutes. Pardon my language but its cr*p. What a complete waste of electricity.