Fastest Way to Charge an iPhone?

Discussion in 'iPhone' started by Gyroworld, Apr 28, 2017.

  1. Gyroworld macrumors newbie

    Joined:
    Apr 19, 2016
    #1
    Hi all,

    I was wondering if anyone has discovered any tricks for charging your iPhone faster (besides using a 2.1A charger). With my own testing, this is what I've gathered:

    From fastest to slowest:

    1. Turn the phone off while charging (obviously makes it unusable)
    2. Turn airplane mode on, then turn on wifi and bluetooth with the screen on very low brightness (makes the phone 100% usable with wifi calling enabled). I also turn on Do Not Disturb mode to minimize screen on time and prevent vibrations along with closing all open apps. Low power mode is usually on as well.
    3. Everything on a.k.a. standard charging

    Things that I've noticed use a lot of power and slow down charging:
    1. Downloading/streaming with poor wifi or cellular speed
    2. Using any navigation app that uses the GPS for precise location (usually while driving)
    3. Playing graphically intense games
     
  2. bkends35 macrumors 6502a

    bkends35

    Joined:
    Feb 24, 2013
    Location:
    USA
    #2
    Yes, believe it or not, putting load on the processor/screen on will make it charge slower...

    Airplane mode and not using it will make it charge fastest without turning it off (Should be obvious). Also you can just use any power supply that is 5v and the iPhone will charge as fast as it can (faster than 1A/5W from the oem power supply).
     
  3. willmtaylor, Apr 28, 2017
    Last edited: Apr 28, 2017

    willmtaylor macrumors G3

    willmtaylor

    Joined:
    Oct 31, 2009
    Location:
    A Natural State
    #3
    Using it more uses more power which causes it to charge slower.

    Using it less uses less power which lets the battery charge faster.

    The end.
     
  4. m4v3r1ck macrumors 68020

    m4v3r1ck

    Joined:
    Nov 2, 2011
    Location:
    The Netherlands
    #4
    Is 5V the absoluut max for charging an iPhone? I came across a video where a DIY 9V charger was made, using the internals of a cigarette-lighters' to USB internals?



    Cheers
     
  5. maxjohnson2 macrumors regular

    Joined:
    Mar 24, 2017
    #5
    Somewhat unrelated, but I tried charging my iPhone SE with an Anker QuickCharge 2.0 charger which is typically for Android phones, and it went hotter than I felt was comfortable, I reverted back to normal chargers. I just use chargers rated at 2.3 or 2.4A @ 5V.

    You can buy USB meters to test your speed. Just be careful with using chargers using USB-C and Qualcomm QuickCharge standard because the meter have to be designed for it since they can charge at higher voltages.
     
  6. bkends35 macrumors 6502a

    bkends35

    Joined:
    Feb 24, 2013
    Location:
    USA
    #6
    The max it will charge at is 5v. If you use a 10v quick charger the phone would still regulate it to 5v.
     
  7. m4v3r1ck macrumors 68020

    m4v3r1ck

    Joined:
    Nov 2, 2011
    Location:
    The Netherlands
    #7
    Thanks for explaining!

    Cheers
     
  8. geoff5093 macrumors 68000

    geoff5093

    Joined:
    Sep 16, 2014
    Location:
    Dover, NH
    #8
    Don't bother with manually changing the brightness, putting on do not disturb, etc., the difference between just letting it sit as normal vs doing that is so minimal. Just use a 5v 2A charger and don't use the phone while it's charging.
     
  9. noobinator macrumors 601

    Joined:
    Jun 19, 2009
    Location:
    Los Angeles, CA
  10. Stefan johansson macrumors 65816

    Stefan johansson

    Joined:
    Apr 13, 2017
    Location:
    Sweden
    #10
    Why not charge it while you sleep,or with a car charger when driving?
     
  11. Applejuiced macrumors Westmere

    Applejuiced

    Joined:
    Apr 16, 2008
    Location:
    At the iPhone hacks section.
    #11
    Just use an ipad charger.
    I plug it in for 20-30 minutes and it goes up usually about 40% or more.
    I wouldnt bother so much with lowering the brightness or putting in airplane mode while charging or other small things.
    It will not make much difference or make it charge much faster.
     
  12. BigMcGuire Contributor

    BigMcGuire

    Joined:
    Jan 10, 2012
    Location:
    California
    #12
    You can't keep the phone off and charge it from what I know. To charge it fastest ? Use mfi certified cables and an iPad charger. That's pretty fast. I recommend Anker for chargers and cables.
     
  13. Yankee512 Suspended

    Yankee512

    Joined:
    Apr 29, 2017
  14. Foggydog macrumors 6502

    Foggydog

    Joined:
    Nov 8, 2014
    Location:
    Left Coast
    #14
    I have the iPad Pro 12.9. I often use that charger on my 6 plus. It charges very very fast. Phone doesn't seem to get hot either. Note, I do have an Apple leather case on it.
     
  15. chilman macrumors regular

    chilman

    Joined:
    Jan 2, 2011
    #15
    I use the car lighter as a source for power, i frankly don't know how much output the adapter produce, but its made to recharge cell phones. Would this be dangerous? Anyone has done or still been doing this?
     
  16. Newtons Apple Suspended

    Newtons Apple

    Joined:
    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #16
    Only way to charge with the phone off is by turning it off after it is connected to the charger. But I think this make so little of a difference that it is not worth the trouble or being out of touch.

    I might be in the minority but I seldom ever have to change my iPhone during the day. I take it off the charger at 3:30 in the morning and it lasts all day till about 8 or 9 when it goes back on the charger.
     
  17. I7guy macrumors G5

    Joined:
    Nov 30, 2013
    Location:
    What Exit?/Saguaro Country
    #17
    Most cars in the last 10 years have a separate plug for cell phone chargers and I don't specifically use the cig. lighter. My car charger is always plugged in and that's what I use when I am in the car.
     
  18. Newtons Apple Suspended

    Newtons Apple

    Joined:
    Mar 12, 2014
    Location:
    Jacksonville, Florida
    #18
    A cig lighter to USB adapter is what many use today. As long as they are fused they should be fine.

    A lot of new vehicles have USB ports built into the console, my SUV even has 100v AC in the back seat but prefer to use the USB ports when needed.
     
  19. joeblow7777 macrumors 601

    Joined:
    Sep 7, 2010
    #19
    This just adds up to, things that draw power from the phone while you are charging it makes it charge slower, which, no offense, is kind of common sense. The same activities that drain your phone quickly will also slow its charging the most.
     
  20. throAU macrumors 601

    throAU

    Joined:
    Feb 13, 2012
    Location:
    Perth, Western Australia
    #20
    Buy an iPad, use the iPad charger to charge the iphone, and use the iPad whilst your phone is charging :D
     
  21. lugworm macrumors 6502

    lugworm

    Joined:
    Apr 4, 2011
    Location:
    UK
    #21
    Bypass the charger altogether. Just stick some bare wire into the phone at one end, then into the mains socket at the other end.
    Switch on....Bob's your uncle, job done.
    Ignore any burning smells that may emanate from your phone, this is perfectly normal, as are a few small flames.
     

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