Qi Charging - Speeds, Amps, etc

Discussion in 'iPhone' started by Knightcastle, Nov 5, 2017.

  1. Knightcastle macrumors 6502

    Knightcastle

    Joined:
    Apr 25, 2015
    #1
    With Qi charging is it just a case of using a 2A power brick and enjoying charging at the same speed as a 2A (iPad) charger with lighting? Or do you need to make sure you’re using a particular Qi charger?

    Can you put the 29W charger into Qi?
     
  2. Ryan1524 macrumors 68000

    Ryan1524

    Joined:
    Apr 9, 2003
    Location:
    Canada GTA
    #2
    Quick-Charge 2.0/3.0 is not the same as plain high-amperage supply. There may be some logic built into it. I'm not the expert in this, so could be wrong, but if there is a standard named, it's safer to make sure that requirement is met.

    Most reviewers seem to recommend RavPower, including TheVerge. The thing is...on Amazon, it would be CAD$82 by the time it's delivered (taxes, shipping, customs). So for CAD$90, I decided the Mophie, which is endorsed by Apple and is available locally, was my pick.

    I'm going to be experimenting with some no-name standing docks though, since it would be better/easier for FaceID. Currently looking at This one.


    Here's a some info.





     
  3. BFG86, Nov 5, 2017
    Last edited: Nov 6, 2017

    BFG86 macrumors 6502

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    Oct 14, 2011
    #3
    I bought a no-name charge on amazon that doesn't work. Placing my phone on it I come back and notice my phone has slid off the charger , the heat most be making it move and the surface is not strong enough to prevent slipping.

    I don't really want to pay $60 for a charger, so may give one of the anker's a shot or not use wireless charging at all.

    I think it's better off getting one that comes with the wall plug instead of having mixed results with your own
     
  4. Knightcastle thread starter macrumors 6502

    Knightcastle

    Joined:
    Apr 25, 2015
    #4
    I’ve got this which is good (and was cheap) but keen to get something faster if it is out there, or at least learn how to make this as fast as possible, hence the post
     
  5. tromboneaholic Suspended

    tromboneaholic

    Joined:
    Jun 9, 2004
    Location:
    Clearwater, FL
    #5
    2A Charger required. iPhone charger is 1A. That’s why some people seem to have problems with some of these QI pads. They are not using the correct plug.
     
  6. Knightcastle thread starter macrumors 6502

    Knightcastle

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    Apr 25, 2015
    #6
    Never had an issue with it not working, works like a dream. Just prepared to pay for something better if it’s out there
     
  7. mrklaw macrumors 68020

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    Jan 29, 2008
    #7
    Why do you need a 2A charger? Current wireless will only charge at 5W so a 1A should be enough. Is there some loss due to the wireless system so you need a higher current at the source?
     
  8. iphonehype macrumors 6502

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    Sep 14, 2012
    #8
  9. mrklaw macrumors 68020

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    Jan 29, 2008
    #9
    Why is it a bad idea? It’ll charge at 5W which is the same speed as the charger that comes in the box. Not as fast as a 2.4A charger or iPad charger, but wireless is about convenience more than absolute speed right now
     
  10. Knightcastle thread starter macrumors 6502

    Knightcastle

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    Apr 25, 2015
    #10
  11. tromboneaholic Suspended

    tromboneaholic

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    Jun 9, 2004
    Location:
    Clearwater, FL
    #11
    I’ve seen several of these on Amazon where the seller/manufacturer says to only use with 2A. There is a difference between watts and amps, but I’m not an electrical engineer. My simple understanding is that amps allow more of charge to pass quickly to make up for the loss of watts due to inefficiency in wireless chargers.
     
  12. The Game 161 macrumors P6

    The Game 161

    Joined:
    Dec 15, 2010
    Location:
    UK
    #12
    Well if you buy the Mophie one when Apple enable wireless fast charging the cable that’s including will allow for fast charge
     
  13. big samm macrumors 65816

    big samm

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    Oct 27, 2008
    #13
    I bought one from Anker, which supports the normal 5w charging, and fast wireless charging which is 10w, and to get fast charging i must use a quick charge 3.0 power brick, anything else should work for the normal 5w charging
     
  14. Hoosier317 macrumors 6502a

    Hoosier317

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    Sep 21, 2016
    #14
    True, but the 8/8+/X will never use 10w. The max they will achieve, after an update, is 7.5.
     
  15. big samm macrumors 65816

    big samm

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    Oct 27, 2008
    #15
    Yes that’s what i heard but it might be useful for other phone in the future or future iphone model, who knows...
     
  16. rider900 macrumors newbie

    rider900

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    Oct 30, 2017
    #16
    I bought the Mophie one from the Apple store, yes it’s expensive but I thought firstly I’d treat myself and secondly that if Apple endorse it then it’ll be good quality and support fast charging later in the update. I could spend £20 a few times to try and find one that works right or £54 for the Mophie which works great.

    What I can’t understand though is why are the iPhone X and 8 series limited to 7.5 watts when I read Qi goes up to 15 watts?
     
  17. big samm macrumors 65816

    big samm

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    Oct 27, 2008
    #17
    They probably keeping this for the next iPhone
     
  18. floridonet macrumors regular

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    Apr 5, 2011
    Location:
    Irvine, CA
    #18
    I have the Mophie and found it to be inconsistent. Placement must be precise or it either will not charge or alternate between charging and not. (Blinking green light as opposed to solid). I’m going to most likely buy a cheaper Qi charger from Amazon and return this one.
     
  19. STC1709, Nov 5, 2017
    Last edited: Nov 5, 2017

    STC1709 macrumors 6502

    Joined:
    May 27, 2009
    #19

    im curious about this as well, the adaptor apple gives is 1A, a lot of these chargers if you buy without an adaptor require 1.5-2.4a adaptor. The Choetech T511 i bought says that in the book. Also a lot of these chargers im seeing that come with adaptors are all 2A

    i should mention that when i use the apple 1a adaptor with the qi wireless one i bought the adaptor gets hot to the touch after charging for a while
     
  20. tromboneaholic Suspended

    tromboneaholic

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    #20
  21. venste85 macrumors newbie

    Joined:
    Nov 1, 2017
    #21
    So will the Anker not charge at 7.5 when the update happens? Is this model ONLY 5 OR 10W, or is it a range of 5-10?
     
  22. Hoosier317 macrumors 6502a

    Hoosier317

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    Sep 21, 2016
    #22
    It's not an either/or situation. It's an "up to" scenario.
     
  23. venste85 macrumors newbie

    Joined:
    Nov 1, 2017
    #23
    Ok, so the Anker seems like the best bet, no? Buy the Anker pad now at $25, when update comes from Apple, buy the Anker plug for $15 as well. Cost is still less than Belkin or Mophie.
     
  24. big samm macrumors 65816

    big samm

    Joined:
    Oct 27, 2008
    #24
    Just buy everything now so you will be ready when the update comes out. I think the anker one is the best looking one also the smallest, i love it
     
  25. STC1709 macrumors 6502

    Joined:
    May 27, 2009
    #25
    so basically if its above 2a u can use any charger? my ipad charger is 2.1a, maybe thats why my 1a apple charger gets hot when connected to my choetech wireless charger ( says 5v-2a on back of the pad)
     

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42 November 5, 2017