Buy The 18w or 30w USB-C Power Adapter?

Discussion in 'iPhone Accessories' started by BigBen2493, May 13, 2019.

  1. BigBen2493 macrumors regular

    May 10, 2016
    So having a hard time deciding which adapter to buy for my Iphone XS for fast charging, been reading about how the iPhone XS and iPhone XR will only draw a maximum of 18 watts?
    Any difference between the two? Charging speeds?
  2. QueenTyrone macrumors 6502a


    Sep 21, 2016
    Yes the more watts the faster it charges, but it’s not a huge amount. The 30 watt will charge slightly faster than the 18watt. There’s YouTube videos about it that did tests.
  3. Shadowbech macrumors 601

    Oct 18, 2011
    Planet iPhone
    Even if you get the 30W charger, it will only draw it's max of 18 watts. So there shouldn't be any difference. I have the 30W charger because I have the Smart Battery case and it charges the phone and the case at the same time. I'm sure the 18W would have done the same.
  4. TheIntruder, May 13, 2019
    Last edited: May 13, 2019

    TheIntruder macrumors 6502a


    Jul 2, 2008
    Read these (1, 2, 3) before you decide.

    Unless there is an immediate need for USB PD, or a desire for future proofing, a 12W adapter is the best bang for the buck.

    Going above 18W won't bring much, if any, advantage for the relatively small batteries in iPhones.
  5. Derzkin macrumors newbie

    May 27, 2015
    30W+ on the iPhone side is only really useful if you have the Apple smart battery case, in which case both the iPhone and the smart battery case will fast charge at the same time. Otherwise, 18W is as much as the iPhone will pull, on the 8 series and newer.

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