Just how fast is faster 7.5W wireless charging in iOS 11.2? As per early testing conducted by Matt Birchler, the difference between 5W and 7.5W charging speed is negligible.

Before iOS 11.2, wireless charging on iPhone 8, iPhone 8 Plus and iPhone X was limited to 5W. iOS 11.2, which is currently in beta, raises that limit to 7.5W—a 50% increase in power on paper.

Having tested the speed difference between 5W and 7.5W implementations, Birchler initially saw no change in performance as his phone took 30 minutes to reach 11% charge.

At the end of Birchler’s two-hour test, his iPhone 8 Plus running iOS 11.2 went from zero to 47% versus 40% with this same charger before iOS 11.2.

He summed it up:

If you have 2 hours to change your phone and there is a 7% difference in the change level, I don’t think that’s a huge deal. Especially when you compare 30 minutes on the charger, I saw literally no change in performance, as it took 30 minutes for the phone to reach 11% charge.

To put his findings in context, the standard 5W charger that came in your iPhone box gets your iPhone 8 Plus to 79% in 2 hours (68% faster) and up to 21% at the 30 minute mark (91% faster). And if you go the fast charge route, Apple’s 29W USB-C charger gets your iPhone 8 Plus to 100% in 2 hours (112% faster) and up to 43% at the 30 minute mark (391% faster).

Another way to look at it: 15 minutes on a wireless charging pad will get you to 6% and the fast charger will get you to 23%. Bottom line: while 7.5W is an improvement, it’s still lacking in the world of wireless charging.

Keep in mind that the current Qi 1.2 standard allows for up to 15 watts of power for wireless charging. There’s no indication as of yet whether Apple will be supporting 15W wireless charging on the current iPhone 8 and iPhone X series.

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Aside from Belkin and Mophie, which partnered with Apple on wireless charging, 7.5W wireless charging is supported by other wireless charging mats, like the RAVPower charger.

If you want to charge your iPhone faster than wireless charging, you’re advised to use your 12W iPad wall adapter or a USB-C Lighting cable and a USB-C fast charge wall adapter.

iOS 11.2 is currently in beta, and will release to all users in the coming weeks.

  • Jon20

    Why is no one comparing the 12W one that comes with the iPad for fast charge results since most people that have iPhones more than likely have an iPad with a 12W charger which is what I use to charge my iPhone 8+. I would be curious to see the results of that.

    • 9to5Slavery

      Good point !

    • CASEACE79

      The iPad wall charger would be the fastest at 12w output. Even with the inclusion of fast wireless charging you only get 7.5w. It’s a pointless comparison as it’s impossible for wireless (at this point) to beat the iPad charger.

  • Gregory D Foster

    They’re saving the higher wattage for the iPhone XS.

    • 9to5Slavery

      That would be funny!
      “Battery from the A11 chip makes it unstable to charge from x to x, that’s why the A12 would make a difference in not only performance but also your daily lifestyle” bs lol

      This is coming from A10 chips can’t do H.265 (new standard with new compression 50% storage) vs A11.
      – though there was a post about grandfathered licensing could be the issue.

      Can we get more support or port from A11 to A10 or A9 for HEVC/h.265 jailbreak?

      • Gregory D Foster

        I fully expect to hear that explanation next year

  • 9to5Slavery

    Jailbreak that iOS 11!!! Mod that plist like i said a couple days ago!

    Boom!! Jailbreaking back to life!

    • Michael Bemelmans

      Wouldn’t it damage the battery over time?

      • 9to5Slavery

        The phone you have majority of the people including you don’t keep the phone for more than 1-5 years. The time where the battery start to drain under heavy usage is usually after 2 years. And that’s a transitional step down every period in the time frame. It should be perfectly fine unless you believe phones with lithium batteries last forever in it’s long term state.

  • Standout

    I get to 55-60% with the 12w charger in about 30 minutes. Both iPhone X and 8plus

  • igorsky

    I’m sure, from Apple’s standpoint, the “negligible” improvements are totally worth it to shut the complainers up.

    • Michael Bemelmans

      They should try and get the same tech as OnePlus with dash charging. They should build a good wall charger and thick cable that allows the through put, then it wouldn’t harm or limit the phone charging capabilities.

      • Or just provide the 29W charger (usb pd) + USB-C calbe with the phone.

      • Michael Bemelmans

        Yes, ok that as well, but still it’s slow.

  • Robin

    Good point !