A few years ago I hard-wired my car for my iPod. This is a factory kit that plugs into the dock and keeps my iPod charged. It has worked on two iPods without any issues. I'd like to know if the charge is appropriate for my 'new-to-me' 1st gen iPhone. I don't want to fry it but have a couple long trips coming and don't want to lug my Macbook with me or purchase a separate charger. Thoughts? Thanks!