Bob,
does your power cable work when you connect to a computer? I have to use
the batteries when downloading / uploading to laptop because the same port
is used for both. Seems like a poor design in an otherwise quality Garmin
product.

Scout, I have not connected the unit to my laptop yet. We just ran the cable
through the pedestal guard so we could have the GPS always on if we wanted.
Perhaps you can split the power leads from the port?

RB