12v charging for iPhone 3g

I have a 12V charger adapter for my 5th Gen Ipod. It has the same connector on the bottom as the iPhone. Can I use that adapter to charge the iPhone with a battery?
I am hoping to get my iPhone before a leave for a month in Alaska in early August. If I get the iPhone then find that the adapter does not work at that time, I won't have time to order something else. The only power I will have is battery power.
Thanks,
Terry

Not necessarily. If your charger outputs 12v like most car chargers do, it won't work with the iPhone 3G. iPhone 3G only accepts USB charging at 5v.
Message was edited by: Samuel Bradbury

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