Howi,

I tbelieve that for whatever reason the current Porsche cars draw higher then average current when parked. The Porsche is programmed to turn off it's remote lock/unlock receiver after 4 days to conserve power.

I was having problems with my Boxster S starting up. I would drive it for 45 minutes and park. You would think that would be enough to get to full chage. I then had trouble turning it over after sitting for an hour. It never stranded me or needed a jump but that time was fast approaching. Went to the dealer as my warrenty was near the end and they said the battery was just tired and nothing was wrong with the system, so they would not replace the battery under warrenty. They seem to regard the battery as a "wear item" like brakes and clutches and they will only do a warrenty replacement if a real problem is detected.

Your problem seems to be comming on sooner then is reasonable and I would try another dealer to see if they can find a problem. The bottom line seems to be, no identified problem - no warrenty fix on batteries.