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      04-12-2012, 11:36 AM   #1
Drives: 2008 E92 M3
Join Date: Aug 2010
Location: Los Angeles

Posts: 490
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Random Question - USB Port

I use the USB port for both flash memory drives (mp3s) as well as to charge various devices.

Does anyone know whether leaving a device plugged into the USB port saps the car's battery? I've always assumed yes, so when the car is off, I pull the device. Still, if the car has a port shut-off feature then I'd prefer not do something that is otherwise not necessary.
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