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piglet
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Silly question, but is it fine to use PI4 PSU to charge phone?

Thu Sep 12, 2019 10:36 am

I'm fairly sure it should be ok...but can I use my spare Pi 4 PSU to charge a USB-C phone?

We've had little luck getting quality USB-C cables that charge well, and am confident that the Pi4 PSU is quality...

jamesh
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Re: Silly question, but is it fine to use PI4 PSU to charge phone?

Thu Sep 12, 2019 10:41 am

I believe that will be fine. I've used Pi3 PS to charge uUSB phones
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drgeoff
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Re: Silly question, but is it fine to use PI4 PSU to charge phone?

Thu Sep 12, 2019 1:35 pm

piglet wrote:
Thu Sep 12, 2019 10:36 am
I'm fairly sure it should be ok...but can I use my spare Pi 4 PSU to charge a USB-C phone?

We've had little luck getting quality USB-C cables that charge well, and am confident that the Pi4 PSU is quality...
Yes should be OK but might not charge the phone as quickly as the original PSU does if it and the phone are "smart".

plugwash
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Re: Silly question, but is it fine to use PI4 PSU to charge phone?

Sun Oct 13, 2019 4:22 am

It's almost certainly safe, how functional it is is another matter. I know my phone charges very slowly when I use one of the raspberry pi micro USB bricks to charge it.

Is there any documentation on how the USB C connector on the official PSU is connected up?

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Imperf3kt
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Re: Silly question, but is it fine to use PI4 PSU to charge phone?

Sun Oct 13, 2019 9:19 am

My phone uses USB-C at 5v only and with the official Pi3 power supply attached via a micro usb to usb c adaptor, it appears to charge slower than a 2A usb cable alone.

Using the Pi4 power supply appears even slower, but it does charge it just fine.

I'm guessing it's the phone itself doing some kind of "smart" charging, where it confuses itself about what is connected to it and actively reduces the charging current to avoid harming the power supply / charger.
Gotta love "smart" tech, it's so much dumber than regular tech.
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