Results 1 to 7 of 7
  1. #1


    Member Since
    May 02, 2005
    Posts
    173
    charging with car's AC - how many devices can be charged
    Hello,
    I am going on a road trip through NZ and I will be driving a lot and be out in the wild for extended periods of time doing photography work. I have a number of devices that need to be recharged by USB and it looks like my car's cigarette lighter may be the only option at times.

    I have an inverter that changes the lighter into a 3 pronged standard plug and I also have a power strip. How many devices can I plug into this power strip to be charged by the car's AC port? Is there any danger there? Obviously I need to be cautious when the car is not running and not kill battery, but while driving; would I risk damage to devices or would it just not charge at all or charge very very slowly?

    With the engine off would the power drain from car battery be the same regardless of the amount of items that I am charging?

    Sadly these days, we are so dependent on rechargeable batteries. I will need to charge and power these items:

    Necessary:
    Batteries for Canon DSLR's
    AA battery chargers for flash
    macbook pro battery (4 yrs old so very little battery life as is...mostly just to keep running while downloading mem cards and backing up on external HD's)

    Not completely necessary:
    Ipod
    Iphone
    backup iphone battery

    Ideally, at the same time while driving; I'd like to charge an iPod, charge DSLR camera batteries, and power a laptop while backing up onto an ext. HD.

    thanks so much for the help and advice!
    Cheers,
    Micah

  2. #2

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Keller, Texas
    Posts
    50,239
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, Sierra
    I really don't have a good answer for you but wanted to warn you about using an inverter which attaches thru the cigarette lighter port. They get hot and can easily blow the fuse of the circuit your lighter is on. Make sure you carry spare fuses along with you.

    As for the devices you mentioned, the MacBook Pro and iPhone will likely draw the most current from the charger USB port.

  3. #3


    Member Since
    May 02, 2005
    Posts
    173
    thanks so much! So with the AC port, I am better off using that mainly for charging AA's and DSLR batteries? And if it get's too hot the fuse will blow before any damage is done to devices?

  4. #4

    chscag's Avatar
    Member Since
    Jan 23, 2008
    Location
    Keller, Texas
    Posts
    50,239
    Specs:
    Late 2013 27" iMac, iPad 3, iPhone 6s+, iPhone 6+, 3 iPods, Sierra
    The AC port should be OK to charge the batteries for your DSLR camera and the AAs. If any over current occurs or the inverter gets too hot, it may blow your auto circuit fuse that the cigarette lighter is on, but there is no danger of overloading or damaging your MacBook Pro or iPhone.

  5. #5

    harryb2448's Avatar
    Member Since
    Nov 28, 2007
    Location
    Nambucca Heads Australia
    Posts
    22,795
    Specs:
    Imac 27", i7 3.5GHz, 3TB Fusion drive, 32GB memory, macOS Sierra.
    You could try solar USB chargers. Without my mate hughvane finding out I said this ~ they don't get that much sun in NZ!


    http://www.jaycar.com.au/productView.asp?ID=MB3593
    Hang on to those original install discs like grim death! Using OS X.7 or later make a bootable USB thumb drive before running Installer!

  6. #6


    Member Since
    Jan 22, 2010
    Location
    Victoria, BC
    Posts
    20,911
    Specs:
    Mid-2012 MBP (16GB, 1TB HD), Monoprice 24-inch second monitor, iPhone 5s 32GB, iPad Air 2 64GB
    all this VERY MUCH depends on how much power the inverter puts out and how much ampage the items you want to charge draw.

  7. #7

    cradom's Avatar
    Member Since
    Feb 14, 2004
    Location
    Groves, Texas
    Posts
    4,614
    Specs:
    21in. iMac 10.11 --- HP Linux Mint 18
    Do yourself a favor, only charge when the engine's running. Unless you like being stuck in the middle of nowhere with no battery.
    And don't exceed the wattage rating of the inverter by plugging too many things in at a time.
    One manís theology is another manís belly laugh.
    -Lazarus Long

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Putting macbook pro in a car fully charged 7hours?
    By Retake in forum Apple Notebooks
    Replies: 2
    Last Post: 07-22-2012, 01:43 AM
  2. Leaving Fully-Charged Devices Plugged In
    By Meteora in forum Schweb's Lounge
    Replies: 9
    Last Post: 01-07-2011, 07:10 PM
  3. Charging a MacBook in the Car
    By davidmichaelson in forum Apple Notebooks
    Replies: 10
    Last Post: 10-14-2009, 06:41 PM
  4. Replies: 2
    Last Post: 06-27-2009, 09:53 AM
  5. looking for one device for car/wall charging
    By wrightm in forum iPod Hardware and Accessories
    Replies: 2
    Last Post: 03-25-2006, 12:26 AM

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •