Beagle, That is true...however on my recent trip, after buying a USB for my GPS...come to find out Garmin requires a USB cable with something in the line so the GPS knows it is hooked to power instead of a computer....I have both types of plug ins. now...but if you buy the cigarette type and USB plug that goes into a cigarette light style plug is only $5....

Bottom line what ever accessories your are going to run make sure you have the plug to run YOUR accessories...