Chcharging using a vehicle utility plug USB adapter

Discussion in 'iPhone Accessories' started by DavidCee, Oct 26, 2015.

  1. DavidCee macrumors newbie

    Oct 26, 2015
    Sun City West, Az
    there has been lots of discussion about charging iPhones & iPads using wall chargers. Lots of talk about how the chargers only put out so much current & devices limit charging current.

    OK, how about the USB adapters that plug into the cigarette lighter outlet. Now I guess nowadays they are called utility outlets. Anyway the 12 VDC outlet in the dash;)

    How much power is provided thru these?

    And how long would it takes to drag a car battery down to point where it would be noticeable when starting a vehicle?

  2. mscann macrumors member

    Feb 10, 2011
    It varies from USB plug. I have dual 12w usb plugs in all my outlets in my Jeep Grand Cherokee. So i have plenty of power plugs for any passengers or devices I use. The in dash USB plugs are very weak but work in a pinch. I know it sounds crazy but between the factory installed USB ports and the USB plugs I have 9 usb ports in my car
  3. willmtaylor macrumors G3


    Oct 31, 2009
    A Natural State
  4. baller1308 macrumors 65816

    Dec 8, 2009
    Car chargers vary depending on manufacturer. Also, they sometimes say one ouptut number but is intended for both ports.

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