Re: Recognizing PD QC chargers

On 14 Oct 2024 11:34:09 +0100 (BST), Theo wrote:

There are testers you can buy which will talk to the PD or QC control
signals and tell you what it claims to do.  Look on Amazon, Aliexpress, etc.
 
Not a recommendation, just an example:
https://www.amazon.com/Voltage-Multimeter-Detection-Capacity-Measurement/dp/B0BS2ZS813/
 
If the microprint tells you the voltages (5/9/12/15/20/48V) you can infer
the PD capability from that, but to do that you'd need to read it.  Try
taking a photo when lit from an oblique angle, which should pick up the
embossing, then zoom into the photo.

Thanks for that information.

What happened to me is I have a desktop portable Jteman bluetooth mount
which is charged by USB-C but which won't charge out of my only USB-C
charger (which is an ONKO with 2 USB-C ports and one USB-A port).

 Charger: 67W Multiport GaN charger
 Model CH-GN67W2ClA
 The specs are super complicated (depending on how many ports are used).
 But I only used one port at a time.

The cables are all known to be good because they charge my phone fine.

When I plug the Jteman to the USB-C ports of the charger, it won't charge.
 JTEMAN Phone Stand with Bluetoolh Speaker
 Product Model: L9
 Battery capacity: 1800mah
 Type-C  Input · DC  5V  1A
 Bluetooth Name: MH669
 Power of Speaker: 403W
 Product Size: 136x89x48mm        ~

But when I plug the Jteman to the USB-A port of the charger, it charges.
Does anyone have any idea why that happens?

I'm assuming it's a PD/QC thing - but I have no real idea why it happens.