As an experiment, I checked the current of a similar USB charging port for the cigarette lighter in my truck. Without devices plugged in, I read 50mA. That’s low enough that I’m not worried about leaving it plugged in all the time.
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-Scott, DW, DG, DB, and DD
2011 Passport 2590BH
2009 Ford F150 SuperCrew F X4 5.4L w/Max Tow
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