battery cut off switch

[sd_boxster]

^ If that's the kind of thing he was asking about, that wouldn't solve the problem anyway. If he's got a parasitic draw on the battery that takes a few days to drain down, it's probably not going to blow a 500ma fuse.

It sounds like you need to have your battery tested... And if it's bad, think twice before shelling out the bucks for a Porsche battery. My AutoZone battery works perfectly and fit perfectly.

[Roxy]

Take the car to an auto electrician and he will check current draw.
If you have access to a multimeter with a fused 10amp test facility, turn everything off remove the keys depress any alarm switches or light switches that are active when the front bonnet is open and check voltage and current draw between the + battery lead (disconnected from the battery) and the battery terminal. Have the battery tested with proper current test equipment.
Roxy