3 watts was 3 watts, just for the phone.

the 3 watt car kit was for a later moto, from 92 that was .5 or something, but the car kit brought it up to 3 in the car.

On another note. My #1 1K GF was on a flight into SEA once, and the pilot was aborting the landing, since they said someone in row 2 was on their cell phone and it was interfering with their tower communcations.

I wasn't there, so cannot confirm that they weren't just trying to put the story onto something less serieous like, landing gear that wouldn't go down, or they really didn't like the guy in row 2, or were just trying to set and example and decided that they would scare everyone on the plane and abort a landing, but I recall the incident.