Will two plugged-in devices drain battery?

BarryJI · 06-19-2015, 11:15 AM

I have an iPhone that I plug into the front cigarette lighter port via a USB adapter and an old-school 30-pin iPod Classic that connects to the car through the aux and USB ports in the center compartment. As long as the engine is running, will it tax the car battery unduly for them both to be plugged in at the same time?

bungee91 · 06-19-2015, 12:47 PM

No, the current draw on these devices is minimal in comparison to the amperage provided by the alternator.

BarryJI · 06-19-2015, 12:51 PM

Thank you.

It might be worth noting that certain devices such as my iPod Classic and my OBD2 scanner (both unsupported by iDrive) will continue to draw from the car battery even with the engine off, so should probably be unplugged every time.

06-19-2015, 11:15 AM	#1
BarryJI Captain 425 Rep 980 Posts Drives: 2015 BMW 228i M Sport Join Date: Apr 2015 Location: United States iTrader: (0)	Will two plugged-in devices drain battery? I have an iPhone that I plug into the front cigarette lighter port via a USB adapter and an old-school 30-pin iPod Classic that connects to the car through the aux and USB ports in the center compartment. As long as the engine is running, will it tax the car battery unduly for them both to be plugged in at the same time?
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06-19-2015, 12:47 PM	#2
bungee91 Private 4 Rep 56 Posts Drives: Wife's F80 Y.M.B. 6MT Join Date: Apr 2011 Location: South of Chicago iTrader: (0)	No, the current draw on these devices is minimal in comparison to the amperage provided by the alternator.
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06-19-2015, 12:51 PM	#3
BarryJI Captain 425 Rep 980 Posts Drives: 2015 BMW 228i M Sport Join Date: Apr 2015 Location: United States iTrader: (0)	Thank you. It might be worth noting that certain devices such as my iPod Classic and my OBD2 scanner (both unsupported by iDrive) will continue to draw from the car battery even with the engine off, so should probably be unplugged every time.
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