Amazon.com: UpBright Car 12V DC Adapter Replacement For GPS Garmin StreetPilot C320 C310 C330 C340 C 320 C 310 C 330 C 340 Street Pilot GPS Cradle 12 Volts Auto Vehicle Cigarette
One Familys Blog: GPS Review - Garmin StreetPilot C series (C310, C320, C330, C340, C510, C530, C550, C580)
Garmin StreetPilot c review: Garmin StreetPilot c - CNET
Amazon.com: Accessory USA AC DC Adapter for Garmin StreetPilot C320 C310 C330 C340 Street Pilot GPS Cradle Power Supply Cable Cord (Note: This AC Adapter Plugs in Garmin GPS Cradle, NOT USB