Is it bad for an MP3 player to be cold?

I know its not good to put them on your dash if the sun will get to them, but what about leaving them like in your glove compartment overnight when it gets frosty out.

Dont batteries keep longer when they are cold?

My liquid in my digital watch froze when it was really cold one day...TarmacChris

The anti-freeze in my car froze once too. It gets cold up here :(

cold = good for electronics. bad for batteries. Bad for monitors (certain ones at least, some have liquids)