iPhone 12 pro magnets trigger foreign object protection on wireless charging stands.

While charging an iPhone 12 pro using a mophie wireless charging stand (previously sold by the Apple store) I’ve noticed that, after a few minutes, the light starts flashing on the charger and the current shuts off. This indicates that the charger has detected a foreign object on the stand. I’ve tried charging with the magsafe silicon case on and off and I get the same result on two different mophie wireless charging stands (charging in both landscape and portrait orientations). Is anyone else seeing the problem with their non-MagSafe wireless chargers?

Posted on Oct 24, 2020 1:17 AM

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Posted on Feb 9, 2021 9:57 PM

Same issue, iPhone 12 not charging, LED on wireless charging stand starts blinking.

Here is the charging hardware specs:


Monoprice Fast Wireless Charging Stand with 2 Coils, 10W, Qi Compatible

Monoprice Obsidian Series USB Smart Charger with Qualcomm Quick Charge 3.0 technology.


I have 2 sets of these as well as 2 iPhone 12's (iOs 14.2.1 on one phone, 14.4 on the other).


I interchanged/swapped all of the above components, including the USB to Micro USB cable. I even switched AC power sources where the charging adaptor was plugged in to. I pulled phone covers off. It starts blinking before 5 minutes are up. I also switched phones.


The most bizarre thing (I have both chargers on our king size bed headboard) is that the failure at this moment stays on the same side of the headboard, even though I've entirely swapped all components from one side to the other. However, let it be known that the same thing happened on the other side of the headboard over night while I slept.


The charger on my side (the side that is working correctly at the moment) was blinking when I woke up today, and I had only about a third of charged capacity on the battery. It should have been fully charge. I have had these brand new phones for a total of 4 days. Each phone has a different case (Otterbox Prefix Series, Casekoo Defender), but that's on non-issue since the problem is present with the cases off.


Frustrated, I put the phone on the problem side directly on a cable connected to the phone's charging port; it's charging correctly.

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Question marked as Top-ranking reply

Feb 9, 2021 9:57 PM in response to PTG0728

Same issue, iPhone 12 not charging, LED on wireless charging stand starts blinking.

Here is the charging hardware specs:


Monoprice Fast Wireless Charging Stand with 2 Coils, 10W, Qi Compatible

Monoprice Obsidian Series USB Smart Charger with Qualcomm Quick Charge 3.0 technology.


I have 2 sets of these as well as 2 iPhone 12's (iOs 14.2.1 on one phone, 14.4 on the other).


I interchanged/swapped all of the above components, including the USB to Micro USB cable. I even switched AC power sources where the charging adaptor was plugged in to. I pulled phone covers off. It starts blinking before 5 minutes are up. I also switched phones.


The most bizarre thing (I have both chargers on our king size bed headboard) is that the failure at this moment stays on the same side of the headboard, even though I've entirely swapped all components from one side to the other. However, let it be known that the same thing happened on the other side of the headboard over night while I slept.


The charger on my side (the side that is working correctly at the moment) was blinking when I woke up today, and I had only about a third of charged capacity on the battery. It should have been fully charge. I have had these brand new phones for a total of 4 days. Each phone has a different case (Otterbox Prefix Series, Casekoo Defender), but that's on non-issue since the problem is present with the cases off.


Frustrated, I put the phone on the problem side directly on a cable connected to the phone's charging port; it's charging correctly.

Oct 31, 2020 5:32 AM in response to PTG0728

I think some Qi chargers have 'foreign object detection' which is designed to stop the charger from giving off energy when something other than a phone (ie metal objects, keys, etc) is placed on it. (Edit, sorry I missed the part in your post where you came to the same conclusion!)


Likely, the magnets in the back of the phones are triggering it. There is another post: iPhone 12 and Anker Powerwave 7.5 - Apple Community - about Anker stands doing the same thing.

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iPhone 12 pro magnets trigger foreign object protection on wireless charging stands.

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