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Apple Watch Magnetic charging cable (connected via USB-C)

Regarding the Apple Watch magnetic charging cable (connected via USB-C), what is the maximum power output (in Watts) that the charger can produce?

Posted on Sep 11, 2021 8:15 PM

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deggie

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Posted on Sep 13, 2021 7:18 PM

Because it is basically a cable, just like the cable for your iPhone, it CARRIES power, it does not PRODUCE power. If you connect the device you pictured to the 20watt power adapter I posted the puck/cable will CARRY 20w to the puck at the end. If you connect it to a MacBook Pro power adapter it will CARRY 85w to the puck. But the Watches power management circuitry controls all charging and it will only ACCEPT 12w.

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jacob__k Author

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Sep 14, 2021 10:37 PM in response to BobHarris

I spoke with an Apple tech support worker today. She said that the Apple Watch Magnetic charging cable (via USB-C) has a maximum carrying capacity and output of 30 watts. Is she wrong? Because BobHarris and deggie both say that the Apple Watch Magnetic charging cable has no maximum carrying capacity and output (in Watts), and that the only regulation or maximum intake of watts exists in the Apple Watch itself.

deggie

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Sep 15, 2021 5:57 AM in response to jacob__k

Can you explain why you are pursuing this? What is the endgame?

As I’ve already said I’ve used an 85 watt charger with the USB-C cable. But also as you have been told anything over 12 watts won’t be used. And it is a power management IC on the logic board that regulates intake.

BobHarris

Level 9

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Sep 15, 2021 11:00 AM in response to jacob__k

The battery is the item that draws the current, so the battery electronics will control the energy flow.

You seem to want to understand how electricity and magnetic fields work. Have you considered that maybe you should pursue a degree in Electrical Engineering? Or Physics?

jacob__k Author

Level 1

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Sep 18, 2021 1:55 PM in response to deggie

@deggie, may I speak with you on the phone to discuss my questions? I created a "dummy" email (because I don't want to disclose my personal email on this public forum), and if you are interested in answering my questions, can you please send an email to the "dummy" email?

[Email Edited by Moderator]

jacob__k Author

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Sep 18, 2021 3:11 PM in response to deggie

Ok, that's fine. Does the size of a wireless charging coil affect its charging rate/speed? For instance, does the size of the wireless coil in the MagSafe wireless charging cable (for iPhones) and the Apple Watch Magnetic charging cable (via USB-C) affect each of their charging rates/speeds?

deggie

Level 10

167,519 points

Sep 18, 2021 3:15 PM in response to jacob__k

So are you trying to design your own charger to sell?

To learn about wireless charging a good place to start, assuming you already have a fairly advanced knowledge of electronics, is the Qi standards site and work your way from there. The Apple Watch puck is not a true Qi charger, but you can also check the Made for iPhone standards site. Again, it will help to have an electronics understanding foundation to read it. If you do not have that check with your local community college and see if they offer an adult course.

Your technical questions have already been answered in detail.

jacob__k Author

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Sep 13, 2021 11:53 AM in response to javaliga

I'm sorry, but this reply does not answer my question.

jacob__k Author

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Sep 13, 2021 2:49 PM in response to BobHarris

This doesn't answer my question: what is the maximum power output (in Watts) that the Apple Watch magnetic charging cable (connected via USB-C) can produce?

deggie

Level 10

167,519 points

Sep 13, 2021 5:52 PM in response to jacob__k

The maximum amount of watts the Apple Watch magnetic charger can produce = 0

javaliga

Level 10

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Sep 13, 2021 6:32 PM in response to jacob__k

Perhaps it would help if we knew WHY you need to know.

jacob__k Author

Level 1

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Sep 13, 2021 6:43 PM in response to deggie

What is the maximum power output (in Watts) that this charger can produce?

jacob__k Author

Level 1

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Sep 13, 2021 7:02 PM in response to deggie

If it can't produce any watts, then what is the maximum power output that this charger produces (in the correct unit measurement)?

jacob__k Author

Level 1

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Sep 13, 2021 7:46 PM in response to deggie

Hmm, I see. Does the Apple Watch magnetic charging CABLE self-regulate (or have a maximum wattage intake) from the power adapter?

deggie

Level 10

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Sep 13, 2021 7:47 PM in response to jacob__k

No.

jacob__k Author

Level 1

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Sep 13, 2021 9:36 PM in response to deggie

If I were to use an 85 Watt power adapter for the Apple Watch magnetic charger (and thus the end puck would carry and emit 85 Watts), would using this power adapter destroy the charger?

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Apple Watch Magnetic charging cable (connected via USB-C)