With credit to the original poster:
disraeli posted this on
Porsche Pete's Boxster Board (*)
"The factory technical manual (Section 97-07 page 2) has the following table of total electrical load after the car has been shut off (ModelYear 02):
(electrical current is worst case, i.e. car loaded w/all options...)
FROM TO mA
0 min 5 min up to approx. 950
6 min 15 min up to approx. 900
16 min 20 min up to approx. 750
21 min 60 min up to approx. 50
61 min until the battery is empty up to approx. 30
1000mA equals, of course, one amp.
If the car had no options whatsoever, the load after 60 min would be 17mA instead of 30mA.