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Movi Juicer. Try google - there are more coming out as the weeks go by from the 3G launch, as they confirm compatability.
 
thanks for the hilarious responses :rolleyes:

it'll be good to know how your one ginguar turns out.

I also found this iSound plus one http://www.play.com/Mobiles/Mobile/4-/5416357/iPhone-iPod-Backup-Battery-Pack/Product.html# , which looks a bit better...

Have to wait and see I suppose...

I liked the fact that the other one can charge using the normal iphone charger, it means when I'm away it's one less cable to carry and that both can be charged off one cable at the same time.
 
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