6

I recently purchased an iPhone X, and along with it I also purchased a 29W USB-C Power Adapter and a USB-C—Lightning cable. This setup is supposed to enable Fast Charging of the iPhone X.

However, always when plugging in the iPhone X to this setup, the phone gives a way the "charging" sound notification twice. Is this normal behaviour?

I don't get the double sound notification when plugging in via normal Lightning-to-USB-A to another 12W adapter, nor when connecting the phone with a Mac.

I'm thinking the second sound notification may have something to do with switching over to Fast Charge, but I haven't been able to find a definite answer. Or perhaps some component is faulty?

This thread (external link) has people asking the same thing: https://forums.imore.com/iphone-x/396144-fast-charge-apple-ac-adapter-cable-double-sound.html

2

Yes, when fast charging iPhone gives the charging sound ("Ding") notification twice. And definitely you will not get sound notification twice when you have used the 12W iPad charger.

12W Charger => The downside is that while it’s faster than the brick that comes with your phone, it’s still not quite the true quick charging speed that a USB-C brick should offer. Simply you could not get the true fast charging. But it is better than what comes with the box.

29W Charger => Apple isn’t saying what the maximum fast charging speed is for the new phones — only that it achieved those fast charging results with its 29W, 61W, and 87W USB-C chargers for the new MacBooks and MacBook Pros. These chargers offer the best fast charging power where you hear the charging sound twice.

References : (EasyAcc, 2017), (Apple Inc., 2017) , (The Verge, 2017).

  • PS: Does Fast Charging still make the sound twice, in iOS 12? For some reason, my iPhone X with a 29W USB-C adapter doesn't make the double sound anymore. Not sure if it's Fast Charging or not. – Winterflags Oct 25 '18 at 9:17

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .