[Raikaito]

I am often taking long flights and I need a reliable long lasting external battery! I would prefer a battery which has a USB out so that I can charge other devices as well but this is now 100% needed. The main one I am looking at is the Kensington Battery Pack... Has anyone used this and also does anyone know of any others etc?

Dell : Kensington Kensington Battery Pack and Charger for iPhone and iPod - External battery pack battery charger Li-pol : MP3 Players : Home & Home Office

Cheers!!!

[Zzebedee]

Ebay is your friend

Not tried these but they are a lot cheaper than the dell one (in case the link doesn't work i just did a search for external iphone battery on ebay)
If you get one post back and let us know how well it works. I'm sure there are many other variations on there too, you might find a usb one like you mentioned

[Raikaito]

Well that one looks ok however I would want to buy from a English seller at least...

[RobM]

Cheap batteries can be more hassle than their worth and rarely offer the longevity of a decent, well made product. Spend wisely and buy with confidence.