Charging late 2016 13" MBP in car: how safe is it?

Discussion in 'MacBook Pro' started by RichardF, Jan 10, 2017.


Road warriors: do you charge your MacBook Pro with USB-C port(s) in the car?

  1. I don't

    0 vote(s)
  2. Yes, with an inverter

  3. Yes, with a USB-C charger

  1. RichardF macrumors 6502a


    Oct 27, 2006
    New York City
    I have ruined the battery on a rMBP 13" laptop in the past using an inverter while on the road before I knew better. The power coming out of those things is not good unless it is a Pure Sine Wave inverter.

    So now, I see Belkin has a USB-PD Certified USB-C Car Charger.
    • Supports 5V and 9V USB-PD up to 3A, total 27W output

    How safe is it for my MBP to use to charge it over USB-C?
    My laptop uses the 61W wall charger.

    If this car charger is not good, which one would you recommend as a power solution while on the road?
  2. kmac007 macrumors regular

    Mar 21, 2016
    How can you not find a charger in between or make the battery last up to the featured 10 hours? How long is your commute for the battery to get a full charge?
  3. New_Mac_Smell macrumors 68000


    Oct 17, 2016
    It should be fine, but won't provide much of a charge to your machine. I think the 13" is wanting around 20v and 3A. So you'd still likely want an inverter to deliver the power needed to charge the laptop. However, I'd say that'd drain your car battery pretty quick and put extra strain on your alternator, which might not be a good idea.
  4. RichardF, Jan 10, 2017
    Last edited: Jan 12, 2017

    RichardF thread starter macrumors 6502a


    Oct 27, 2006
    New York City
    The battery life does not extend anywhere near 10 hours depending on how the laptop is being used.
    I want to flexibility to charge up without wasting additional time hanging out at a place to use their A/C outlet.

    Thank you very much for answering my questions.

    You are right @New_Mac_Smell (love the Apple brand new smell btw), the supplied Apple charger outputs 20.3V and 3A.
    This Belkin charger only outputs 9V USB-PD up to 3A, total 27W output.

    To clarify for others who may be reading this and wondering:

    Amps would be the volume of water flowing through the pipe.
    The water pressure would be the voltage.
    Watts would be the power (volts x amps) the water could provide (think back to the old days when water was used to power mills).

    More reading here:


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