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      01-22-2013, 09:49 AM   #5
creepy coupe
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Drives: M235i
Join Date: Aug 2007
Location: UK

Posts: 8,173
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2009 335i  [0.00]
As per Xenon. I bought one of these for the Porsche as the battery was fairly small. It has a condition monitor and you can leave it connected as long as you want.