Anyone try a 45 W Charger on 12.9 IPad Pro?

Discussion in 'iPad' started by Alaxlmartin, Nov 10, 2018.

  1. Alaxlmartin macrumors regular

    Alaxlmartin

    Joined:
    Feb 20, 2018
    #1
    Why do you need more than 18W?

    Faster charging baby! While Apple only ships with 18W, the new iPads actually go double that speed – up to 45W safely, according to Marco Arment on his latest Accidental Tech Podcast, where he asked Apple the question directly. This is nearing 13-inch MacBook Pro charger territory, as Apple ships that device with a 61W charger in the box. In fact, Apple’s new MacBook Air only ships with a 30W adapter.


    https://9to5toys.com/2018/11/08/top-5-usb-c-fast-chargers-for-ipad-pro/



    I currently have a 29 OEM Charger. Any suggestions?
     
  2. Reidan macrumors regular

    Joined:
    Apr 12, 2012
    #2
    Like you I read that they would work with higher wattage and charge faster. So I ordered the 29w Apple Power Brick and Seperate Apple Branded USB-C Cable’s from BestBuy. They have arrived, but still waiting for my 12.9” iPad. . So no experience yet.

    I want extra chargers for home, office, laptop bag, etc. I figured that 18w being the OEM Charger, the 29w should give plenty of extra speed.

    My MacBook is three years old and has the MagSafe connector, so will not need higher wattage chargers for a MacBook.
     
  3. profets macrumors 601

    Joined:
    Mar 18, 2009
    #3
    Marco later followed up on twitter mentioning that while they supposedly support 45W, the highest he saw (or maybe someone else) was 30-something watts (I think it was 38W?)
     
  4. AppleHaterLover macrumors 68000

    Joined:
    Jun 15, 2018
    #4
    Yay, another charger question!!!!!

    Here's the deal: 61W and 87W chargers will charge that iPad at 18W.

    The 29W/30W chargers will charge it at full speed - i.e. faster than the other chargers.

    It's not a matter of power, it's a matter of supporting a certain voltage and current profiles - i.e. the charger cannot choose at will to provide a variation of current and voltage, only a few certain pre-settings - to put it simply.

    I don't think that the iPads need more than 30W honestly.
     
  5. Alaxlmartin thread starter macrumors regular

    Alaxlmartin

    Joined:
    Feb 20, 2018
    #5
    Thank you. 30 W Apple OEM, even though it isn’t cheap, is still the Gold standard.
     
  6. WesEdit macrumors member

    WesEdit

    Joined:
    Nov 12, 2018
    #6
    There are two different Apple 61W Power Adapters:

    - Apple 61W USB-C Power Adapter A1947 (13” MacBook Pro 2018), 60,3W (20,3V/3A PD), 45W (15V/3A PD), 27W (9V/3A PD), 15,6W (5,2V/3A)

    - Apple 61W USB-C Power Adapter A1718 60,3W (20,3V/3A PD), 27W (9V/3A PD), 12,48W (5,2V/2,4A)

    While the A1947 will support charging at max. speed (theoretical up to 15V/3A), the A1718 won’t do. But it seems the A1718 could at least deliver 27W (9V/3A) to the new iPad Pro.
     
  7. iapplelove macrumors 601

    iapplelove

    Joined:
    Nov 22, 2011
    Location:
    East Coast USA
    #7
    Ohh sweet you mean I can charge this beast faster? My 12.9 doesn’t charge any quicker than my iPad Air did from zero up to 100.
     
  8. WesEdit, Nov 14, 2018
    Last edited: Nov 14, 2018

    WesEdit macrumors member

    WesEdit

    Joined:
    Nov 12, 2018
    #8
    At least it should be possible to use fast charging with an iPad Pro 12,9”. I never compared it with the iPad Air charging times. It depends on your iPad Pro generation, iPad Pro size, power adapter specifications and cable specifications. All this has an impact on whether fast charging works at all and how fast.
     
  9. DNichter macrumors G3

    DNichter

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    Apr 27, 2015
    Location:
    Philadelphia, PA
    #9
    I went with the 30W Anker one, works well.
     
  10. masotime macrumors 68020

    masotime

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    Jun 24, 2012
    Location:
    San Jose, CA
    #10
    I don't have enough time to do a comprehensive review, so I thought I'd just drop a few stats (12.9" 2018 iPad Pro)

    I have a cheap USB 2.0 USB-C charging cable from Monoprice ($0.38 lol), and a clearance Incipio 65W USB-C PD charger lying around, so I did some very quick tests after using GFXBench Metal's Manhattan Battery Test to drain my iPad Pro.

    Here's a quick table - most of these are with the screen on (which makes the iPad draw more power, usually about 3-4W more)

    Code:
    +------+---------+---------+-------+
    | Batt | Voltage | Current | Power |
    +------+---------+---------+-------+
    |  3%  | 14.3V   | 2.38A   | 34W   |
    |  12% | 14.3V   | 2.36A   | 33.7W |
    |  29% | 14.2V   | 2.54A   | 36W   |
    |  62% | 14.3V   | 2.35A   | 33.6W |
    |  80% | 14.4V   | 1.57A   | 22.6W |
    |  86% | 14.5V   | 1.09A   | 15.8W |
    |  90% | 14.5V   | 0.83A   | 12W   |
    +------+---------+---------+-------+
    
    There's some margin of error in my results, but based on my observations:
    • The new iPad Pro is capable of drawing more than 30W, but not much more.
    • It sustains a 15V input for much longer than the older generations, and a higher power draw for longer.
    For the 15V input, I noticed it would accept that voltage level all the way until 100%, after which it seemed to drop to 5V.

    I'll see if I have the time to do a more comprehensive test, but first I have to find out how to buy the A1947 @WesEdit mentions - I can't tell from the Apple Store packaging that it's the right model :rolleyes:
     
  11. WesEdit macrumors member

    WesEdit

    Joined:
    Nov 12, 2018
    #11
    Thanks for the measurement data. That's a huge boost. Almost twice as much watts until the battery is charged to 60% (possibly even to 70%).
    Btw., the exact Power Adapter specifications and the Model Number are always printed on the charger.
    I think the A1947 is the charger which came with the 2018 MacBook Pro 13”, but I am not sure. So better check this.
     
  12. masotime macrumors 68020

    masotime

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    Jun 24, 2012
    Location:
    San Jose, CA
    #12
    Thanks! It’s definitely on the charger, but not on the box :(. I’ll have to snag an Apple employee at the store to open it and let me take a look heh.
     
  13. Zune55 macrumors 6502a

    Zune55

    Joined:
    May 2, 2015
    #13
    What does it mean “charge it at full speed” I have 87W charger and it is charging 50% in 30 minutes. Are you saying 30W charger would charge iPad 11 faster than 87W. Please let me know, i bought the charger from bestbuy, i would exchange it for 30W if its no difference or would get better charging. Thanks
     
  14. JPack macrumors 601

    JPack

    Joined:
    Mar 27, 2017
    #14
    The 30W and 61W (updated version) have the 15V profile which will charge the iPad Pro faster than the 87W adapter.

    As far as I know, the 87W doesn't have a 15V profile. You can check the printed text on the adapter.
     
  15. WesEdit macrumors member

    WesEdit

    Joined:
    Nov 12, 2018
    #15
    Yes, the LIFEPOWR 65W USB-C Charger also supports Power Delivery with 15V/3A. This is the Fastest charging profile for the new iPad Pro. Can you please tell us a charging time from 0-100% (standby mode).
     
  16. Zune55 macrumors 6502a

    Zune55

    Joined:
    May 2, 2015
    #16
    Is MNF72LL/A Model A1718 an updated version of 61W? Just got from Bestbuy thinking it would have the 15V profile but it also has 9V profile just like 87W. Specs are written on charger & not on the box that’s I couldn’t check that in store.
     
  17. JPack macrumors 601

    JPack

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    Mar 27, 2017
    #17
    No, the updated (2018) version of the 61W adapter is A1947.

    63f7b454gy1fu865r2ontj20sg0izdyv.jpg

    63f7b454gy1fu865r6vj1j20sg0izkci.jpg
     
  18. aevan macrumors 68040

    aevan

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    Feb 5, 2015
    Location:
    Serbia
    #18
    Are you sure? This would actually be good news for me as I don’t need fast charging (I either charge over night or use the iPad at desk, while it’s connected to power) and slower charging is better for the battery. I have a 87W charger for my 15” MBP and was thinking if I could use it to charge my iPad Pro too once it arrives.
     
  19. Beards macrumors 6502a

    Beards

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    Mar 22, 2014
    Location:
    Derbyshire UK
    #19
    There is also this similar charger ~ Inateck 60W USB C Charger with 2-Meter Type C Cable, Power Delivery Wall Charger compatible MacBook Pro 2017/2018, and other Type C Devices, Black https://www.amazon.co.uk/dp/B076Q6Z2RL/ref=cm_sw_r_cp_tai_YCu8Bb0W2XYWB
    The cable though is 2mtrs so I wouldn’t use it for data transfer.
     
  20. yegon macrumors 68030

    Joined:
    Oct 20, 2007
    #20
    Does the bundled 18w charger fast(er) charge the XS Max? (With the correct USB-C Lightning cable)

    I’ve already got the 29w charger, works great. The 18w charger is nice and small with the folding pins, I’d like to buy another one when Apple start selling them individually, nice and small to leave in my work bag.
     
  21. AppleHaterLover macrumors 68000

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    Jun 15, 2018
    #21
    All current Apple chargers will charge all iOS devices.

    We really need a sticky for this subject
     
  22. yegon macrumors 68030

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    Oct 20, 2007
    #22
    I mean fast charge the XS Max. I’m pretty certain it does, but I’d like to know for sure. Immaterial though as Apple don’t sell the 18w charger individually yet, oddly.
     
  23. AppleHaterLover macrumors 68000

    Joined:
    Jun 15, 2018
    #23
    It likely will. We don’t have the specs for the 18W charger but I’d assume it’s using 9V-2A.

    But really the most cost-effective way to “fast” charge an iPhone is the 12W USB-A iPad adapter that Apple sells for $19, and you already have the cable. The difference when charging the iPhone vs. a 18W adapter is marginal (a LOOOOOOT less than the 50% you would expect). I charge mine exclusively with the 12W charger.

    See https://www.macrumors.com/guide/iphone-x-fast-charging-speeds-compared/
     
  24. yegon macrumors 68030

    Joined:
    Oct 20, 2007
    #24
    I’ve accumulated quite a few 12w chargers already. The attraction of the new 18w charger is it’s almost as compact as the crappy 5w charger, the folding pins make it much easier to store in my bag. UK, the three pronged 12w charger is quite cumbersome in my bag. Sound like nothing, but I have to carry a LOT of stuff in my work bag, any space saved is a bonus.

    Plus, I get limited time with access to mains charging at work so the faster the better, however insignificant.
     
  25. Zune55 macrumors 6502a

    Zune55

    Joined:
    May 2, 2015
    #25

    Thanks for the info, i hope apple is selling this version separately & not just packaging it in their MacBooks. The charger i bought I bought from bestbuy was a1718, i guess Bestbuy hasn’t gotten new chargers yet.
    --- Post Merged, Nov 18, 2018 ---
    You post is very informative, do you know if cables makes any difference in charging process i.e usb 2.0/3.0 cable, usb-c to usb-c, usb-c lightening. Do the cables have to be of certain specs for fast charging?
     

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