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aus+uk / uk.telecom.mobile / Re: USB-C to lightning lead

SubjectAuthor
* USB-C to lightning leadScott
+* USB-C to lightning leadTheo
|`* USB-C to lightning leadScott
| `* USB-C to lightning leadTheo
|  `- USB-C to lightning leadTweed
`* USB-C to lightning leadWoody
 `- USB-C to lightning leadScott

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USB-C to lightning lead

<802fji55sr96m0bpmi6snlff617vgqgt49@4ax.com>

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From: newsgroups@gefion.myzen.co.uk (Scott)
Newsgroups: uk.telecom.mobile
Subject: USB-C to lightning lead
Date: Tue, 24 Oct 2023 10:06:10 +0100
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 by: Scott - Tue, 24 Oct 2023 09:06 UTC

Just out of curiosity, I see Apple now produce a USB-C to lightning
lead. For an older iPad, is there any speed advantage in charging
given the USB-C charger is far more powerful? I have heard (1) +50%
and (2) +0% because the iPad software determines and limits the
charging speed.

Re: USB-C to lightning lead

<tYs*nsEtz@news.chiark.greenend.org.uk>

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From: theom+news@chiark.greenend.org.uk (Theo)
Newsgroups: uk.telecom.mobile
Subject: Re: USB-C to lightning lead
Date: 24 Oct 2023 10:45:27 +0100 (BST)
Organization: University of Cambridge, England
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 by: Theo - Tue, 24 Oct 2023 09:45 UTC

Scott <newsgroups@gefion.myzen.co.uk> wrote:
> Just out of curiosity, I see Apple now produce a USB-C to lightning
> lead. For an older iPad, is there any speed advantage in charging
> given the USB-C charger is far more powerful? I have heard (1) +50%
> and (2) +0% because the iPad software determines and limits the
> charging speed.

I don't know what iPad you have, but iPhones from 8 series onwards (2017)
supported faster charging via USB Power Delivery, which requires a USB-C at
the other end. I'd guess it came in for iPads at roughly the same time.

Charging is always software limited, to maintain battery health. It will
always charge faster when the battery is empty, and then charging speed slow
down as the battery becomes full.

Theo

Re: USB-C to lightning lead

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From: newsgroups@gefion.myzen.co.uk (Scott)
Newsgroups: uk.telecom.mobile
Subject: Re: USB-C to lightning lead
Date: Tue, 24 Oct 2023 11:50:38 +0100
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 by: Scott - Tue, 24 Oct 2023 10:50 UTC

On 24 Oct 2023 10:45:27 +0100 (BST), Theo
<theom+news@chiark.greenend.org.uk> wrote:

>Scott <newsgroups@gefion.myzen.co.uk> wrote:
>> Just out of curiosity, I see Apple now produce a USB-C to lightning
>> lead. For an older iPad, is there any speed advantage in charging
>> given the USB-C charger is far more powerful? I have heard (1) +50%
>> and (2) +0% because the iPad software determines and limits the
>> charging speed.
>
>I don't know what iPad you have, but iPhones from 8 series onwards (2017)
>supported faster charging via USB Power Delivery, which requires a USB-C at
>the other end. I'd guess it came in for iPads at roughly the same time.
>
>Charging is always software limited, to maintain battery health. It will
>always charge faster when the battery is empty, and then charging speed slow
>down as the battery becomes full.
>
It is a 'heritage' iPad Mini 2. It certainly works via USB-C but I
wondered whether it benefits. Given the cable came from Apple
(original), I assume it cannot disbenefit?

Re: USB-C to lightning lead

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From: harrogate3@ntlworld.com (Woody)
Newsgroups: uk.telecom.mobile
Subject: Re: USB-C to lightning lead
Date: Tue, 24 Oct 2023 12:22:35 +0100
Organization: A noiseless patient Spider
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 by: Woody - Tue, 24 Oct 2023 11:22 UTC

On Tue 24/10/2023 10:06, Scott wrote:
> Just out of curiosity, I see Apple now produce a USB-C to lightning
> lead. For an older iPad, is there any speed advantage in charging
> given the USB-C charger is far more powerful? I have heard (1) +50%
> and (2) +0% because the iPad software determines and limits the
> charging speed.

USB-C to Lightning is Lillhult from Ikea at £10 a pop - but very good
high quality 1.5m cables.

Re: USB-C to lightning lead

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From: newsgroups@gefion.myzen.co.uk (Scott)
Newsgroups: uk.telecom.mobile
Subject: Re: USB-C to lightning lead
Date: Tue, 24 Oct 2023 12:26:18 +0100
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 by: Scott - Tue, 24 Oct 2023 11:26 UTC

On Tue, 24 Oct 2023 12:22:35 +0100, Woody <harrogate3@ntlworld.com>
wrote:

>On Tue 24/10/2023 10:06, Scott wrote:
>> Just out of curiosity, I see Apple now produce a USB-C to lightning
>> lead. For an older iPad, is there any speed advantage in charging
>> given the USB-C charger is far more powerful? I have heard (1) +50%
>> and (2) +0% because the iPad software determines and limits the
>> charging speed.
>
>USB-C to Lightning is Lillhult from Ikea at £10 a pop - but very good
>high quality 1.5m cables.

£19 at John Lewis though :-( However, I suppose I am saving on
petrol.

Re: USB-C to lightning lead

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From: theom+news@chiark.greenend.org.uk (Theo)
Newsgroups: uk.telecom.mobile
Subject: Re: USB-C to lightning lead
Date: 24 Oct 2023 13:11:17 +0100 (BST)
Organization: University of Cambridge, England
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 by: Theo - Tue, 24 Oct 2023 12:11 UTC

Scott <newsgroups@gefion.myzen.co.uk> wrote:
> It is a 'heritage' iPad Mini 2. It certainly works via USB-C but I
> wondered whether it benefits. Given the cable came from Apple
> (original), I assume it cannot disbenefit?

Launched 2013. That doesn't have USB-PD fast charging.
It'll likely work just the same as before.

Theo

Re: USB-C to lightning lead

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From: usenet.tweed@gmail.com (Tweed)
Newsgroups: uk.telecom.mobile
Subject: Re: USB-C to lightning lead
Date: Tue, 24 Oct 2023 12:18:54 -0000 (UTC)
Organization: A noiseless patient Spider
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 by: Tweed - Tue, 24 Oct 2023 12:18 UTC

Theo <theom+news@chiark.greenend.org.uk> wrote:
> Scott <newsgroups@gefion.myzen.co.uk> wrote:
>> It is a 'heritage' iPad Mini 2. It certainly works via USB-C but I
>> wondered whether it benefits. Given the cable came from Apple
>> (original), I assume it cannot disbenefit?
>
> Launched 2013. That doesn't have USB-PD fast charging.
> It'll likely work just the same as before.
>
> Theo
>

Might it not charge very slowly? Pre PD days Apple chargers depended on
combinations of pull up and pull down resistors on the USB data lines to
initiate faster charging. I’m unclear as to whether or not this legacy
system is supported by USB-C PD chargers.

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