? on power antenna not going down

hello,
my power antenna on '97 galant has become stuck in the up condition w/the cold weather. I've been pushing it down but i was wondering if keeping it up once I leave kills the battery. i dont hear motor turning but i had neighbor w/cutlass cierra that got stuck in up position and it kept on trying to go down even w/engine shutoff and killed his battery....

thanx,
alan k