low battery warning from nav speaker

[GaryG7]

I've had the car battery and the key fob battery checked at the dealer. The ipod Nano connected to the system was fully charged and my iPhone, connected via Bluetooth, was over 80% charged. I heard the nav system voice say "Low Battery" (or was it "Battery Low") a couple of times.

Any clues or suggestions?

Thanks,
Gary

[audtatious]

If it's the key fob you will get a notification on the dash saying it is low. I have a similar nav package in the sedan and have never heard it say the battery was low, even when I had to replace the battery. Could it have been from one of your bluetooth or ipod components?