battery goes flat - '06

anyone else having this prob?.........the battery will go dead in my '06 'stang within 3 weeks parked in the garage........a lot less if I turn the alarm on (factory).
dealer sez they've tested everything and no unusual drain - all normal - I should just drive it more. great. I've got a number of cars and the older ones can sit all winter without going dead,.....looks like the 'stang would go dead in a week if I left it at the airport with the alarm on, etc. crazy!

Add pictures here
<% if( /^image/.test(type) ){ %>
<% } %>
Add image file
Upload is a website by car enthusiasts for car enthusiasts. It is not affiliated with any of the car or spare part manufacturers or car dealers discussed here. All logos and trade names are the property of their respective owners.