Basically I’m trying to de-clutter the cables to my charging station, and was hoping to use a 3-way cable for my phone, watch, and headphones.
My main concern is if one device is able to successfully negotiate QuickCharge or PD, would that send 9-20 volts to the other devices?
e.g. if I grabbed the wrong cord and hooked it into my laptop, the laptop requests 20v, would that PD negotiation succeed and also send 20v to my 5v devices on the other two leads?
I’ve only used these kinds of cables with USB-A and chargers that can only output 5V. Most of my chargers now are QC/PD so I’m curious if I should avoid those or take any particular precautions.
My main concern is if one device is able to successfully negotiate QuickCharge or PD, would that send 9-20 volts to the other devices?
Yes.
QC negotiation works by changing the voltage. This communication would be broken if you plug several devices to 1 charging port.
So you better get a charger with several ports where each port is capable of delivering QC / PD. They have independent communication then, and each device gets it’s proper voltage.
That’s assuming this cable forwards PD signals at all.
Do you use all the cables all the time? If not, you could get a couple retractable ones to keep things tidy. Then just plug in the 2-3 things you regularly use.
Have you thought about 3 cables but running them through a cable sleeve? This way you can get a three port charger and three cables But have them feel like one big cable.
My main concern is if one device is able to successfully negotiate QuickCharge or PD, would that send 9-20 volts to the other devices?
Yes, but these cables won’t do that anyway. You’ll get 5V and maybe 1.6A if you’re lucky. They’re good for charging a flashlight.
That’s what I was thinking (basically assuming they lack the CC wires/pins to negotiate power delivery), but the listing does say one of the leads does support data transfer which made me wonder. I’m assuming they share the VCC and ground so if the data-capable one triggered a higher voltage from the charger, then they all would get the same output voltage.
I’m not sure how QC is negotiated, but it doesn’t seem to need any extra pins like Power Delivery, so I still wonder about that.