Belkin and Kensington Car Charger

I have both a Belkin charger and a Kensington charger/fm transmitter that I''ve used for several years for my 3rd gen. ipod. Will these work with the phone? I'm not concerned with the fm transmitter working, I would use that one for charging only. I don't want to damage the phone and will buy a new one if necessary but would like to use what I have if possible.
Thanks for your help,
John