Porsche battery etc.

[Tessie McMillan]

The only reason I can think of why you wouldn't want to put a given 
connector into any given cigarette lighter is that some electrical systems 
work with reverse polarity.

I haven't seen anything that describes Porsches as being reverse polarity, 
and I've swapped optima batteries from my Audi to my 911 to my Alfa and 
back. Someone said Alfas run reverse polarity, but apparently not my '87 
spider.

I'm not an electrical/mechanical type person, but my first instinct would 
be to get something to test the ends of the machine you want to run and 
see which way the current flows...

I missed the original thread, so apologies if I'm not on the right 
topic...

Tess
in Bellevue, WA USA