I have my Lilliput 629 set to turn on when the computer sends a VGA signal. I do not drive my car much during the winter months so it just sits in the garage. But my battery is dying after two weeks of storage. I have disconnect all my after market equipment including cutting power to my DSATX. The only thing left maybe the Lilliput. I don't remember if it is wired to a constant 12v or ign. Would the screen drawing anything idle?