A while back I bought a Garmin Nuvi 2539 auto GPS for use both in the car and on the bike. Small enough to tuck in a bag and pull out on a ride. Large enough to see in a car. From Day One I've had trouble updating the maps.

Documentation is, generously speaking, very poor. But, after fiddling and calls to Garmin Support I've been able to update the maps. Until last night.

Now Garmin tells me their devices are not designed to be updated with a laptop. Only a desktop, or other full size computer, is to be used. The rep claimed laptops don't have enough power to their USB ports. No one has mentioned that before. It is not in their sales literature, or in the Owner's Manual.

Is this true? Anyone else's experience? Must I use either a powered USB hub, or a full size computer to update?

If so that is a real design deficiency.