2005 Boxster: Battery dead every time!!

Hi,
I have a 05 boxster. I dont drive it and keep it in parking garage at
work and I start it up every day and every time I need to get it
jupmed, the battery is dead. ive gone through three new batteries. Its
at the dealership now and they cant figure it out. Something unknown
is draining the battery. Does anyone else have this problem? Thanks.

You need to put a milliameter between the battery and ground to see
what the drain is exactly. It typically is a bad switch on the
automatic radio antenna. However it could be any number of things.
The amount of electrical drain will be a hint.