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      09-04-2012, 12:47 PM   #6
02420X3
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Drives: 2011 X3 35i
Join Date: Jun 2011
Location: Boston

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My recollection is that the OBD port stays powered up, unlike the Lighters, which will power down after 10-15 minutes. I recall past threads that discussed solar trickle chargers, where those two ports were discussed.