In Reply to: I was wondering if anybody knew posted by balione on Saturday, 29. December 2007 at 09:49 Bali Time:
Most cars run on 12 volt direct current, so it does not matter where in the world you might want to charge your phone. However, there are a few exceptions e.g. the old V-Dubs produced 6 volt D.C.
The same should apply to GPS systems, but to be sure check the input voltage for each piece of equipment on the equipment or in the specifications.
Happy charging