USB-C car charger

bod1467

I thought the question had moved on ... it's not the fact that the cable has USB-C at both ends that enables fast charging - it's the charging capacity of the charger.

So the general consensus is ... if you want fast charging akin to plugging the 5X into the wall charger, get a car charger that will supply 3A. The car charger does not need a USB-C port.

agrinnall

Well I'd already said to you in post #7 that the original question still stands, if people want to debate an alternative that's fine, and they can even do so in this thread, but the question itself hasn't moved anywhere. If I hadn't already bought a A-C cable then all of the offered solutions would require me to do so, which isn't the money saving way to go.

bod1467

And you admitted that you could be wrong (in post #7) ... I believe you are, and I believe that is also the consensus of opinion.

But it's a fair comment about purchasing a cable. That said, if you're purchasing a charger then the cost of a cable is minimal.

GT60

Haven't a clue on what an USB c is but I have one of these and has different charge rates
http://www.tomtom.com/en_gb/drive/accessories/chargers-cables/high-speed-multi-charger/

agrinnall

bod1467 wrote: »

And you admitted that you could be wrong (in post #7) ... I believe you are, and I believe that is also the consensus of opinion.

But it's a fair comment about purchasing a cable. That said, if you're purchasing a charger then the cost of a cable is minimal.

Ah, but the admission is followed by a "but" which returns things back to the original question.

And I'm yet to accept that I am wrong, as nobody has proven that a fast USB-A to USB-C link is as good at charging as a C-C link is by design. Of course, as I'm not an electrical engineer if somebody put forward a load of technical waffle and claimed that proved it I probably wouldn't be able to refute it.

bod1467

The chances of their being any electronics in the C-C cable that would make charging faster using that cable is highly unlikely. Therefore the probable important factors are:

1. The gauge of the wire in the cable. (Lower gauge = lower resistance = higher amperage capacity for a given source voltage)
2. The amperage charge capability of the charger

2 depends on the charger; 1 depends on the wire so has no dependence on the type of connector.

The only caveat to this is per my opening sentence ... if the C-C cable has some electronics in it to make the 5X only allow a lower charge if another cable type is used. But in that case it is simply a cheat .. the physics of the materials would allow a higher (faster) charge.

PS - I am an electrical engineer.

agrinnall

Technical waffle wins the day .

RumRat

NO...I am an electrical engineer.........................:cool:

agrinnall

bod1467 wrote: »

The chances of their being any electronics in the C-C cable that would make charging faster using that cable is highly unlikely.

I found this statement on USB-C on Wikipedia:

Full-featured USB Type-C cables are active, electronically marked cables that contain a chip with an ID function based on the configuration data channel and vendor-defined messages (VDMs) from the USB Power Delivery 2.0 specification. USB Type-C devices also support power currents of 1.5 A and 3.0 A over the 5 V power bus in addition to baseline 900 mA; devices can either negotiate increased USB current through the configuration line, or they can support the full Power Delivery specification using both BMC-coded configuration line and legacy BFSK-coded VBUS line.

https://en.wikipedia.org/wiki/USB_Type-C

I don't know whether that means your caveat is in fact what is happening, but I'm sure the proliferation of electrical engineers in this thread will be able to provide an answer

GT60

So an USB C is just another thing to use instead of a normal USB cable?