I have a problem that just started about 2 months ago with my 2009 Beetle Convert. If my car sits for more that 2 days, the battery is dead. I thought because the battery was the original battery it must be going bad. I put in a new battery and it has been fine until this morning, I go to start it and the battery was dead. I put it on a charger and within 20 minutes it started fine. Nothing is left on while it sits and the charging system is operating normally, any Ideas?