B**G
Dreamvasion's Coiled Type C Usb-c USB 2.0 cable is not spec compliant. May cause damage to charger, hub or PC USB ports
Benson again continuing my reviews of USB Type-C legacy cables. This time, I'm reviewing Dreamvasion's "Retractable Coiled USB 3.1 Type C Male Usb-c to USB 2.0 Type a Male cable."This cable does not correctly follow the USB Type C specification Release 1.1. To find the specification, please go to usb.org, and look under developers/usbtypec.Specifically, using this charging cable, the Chromebook Pixel will attempt to draw 3A of current over the cable, potentially damaging the USB hub or charger on the A side, which is not guaranteed to be rated at 3A.Let’s see this in action. I have plugged the Dreamvasion cable into my Chromebook Pixel and and an Apple 12W Type-A charger.Let’s run the ectool command :localhost ~ # ectool --dev 1 usbpdpowerPort 0: SNK Charger Type-C 1636mV / 3000mA, max 5000mV / 3000mA / 15000mWPort 1: SRCThe charger has browned out, or tripped its overcurrent protection, and is only providing 1.6V. The Pixel is not charging at this point.Please see Section 4.11 of the Type-C specification and the following note :1. For Rp when implemented in the USB Type-C plug on a USB Type-C to USB 3.1 Standard-A CableAssembly, a USB Type-C to USB 2.0 Standard-A Cable Assembly, a USB Type-C to USB 2.0 Micro-BReceptacle Adapter Assembly or a USB Type-C captive cable connected to a USB host, a value of 56 kΩ± 5% shall be used, in order to provide tolerance to IR drop on V BUS and GND in the cable assembly.In other words, since you are creating a USB Type-C plug to a USB 2.0 Type-A Plug assembly, you must use a resistor of value 56kΩ as a pull-up on CC (configuration channel). According to my testing, your cable uses a 5.1kΩ pull-up, which is not legal when the other end of the cable or adapter is a legacy Type-A or Type-B connector or receptacle.Please let me know if there is any more information I can provide about why these adapters are problematic.For consumers, I do not recommend buying this cable, as it may cause damage to your charger, hub, or PC USB ports.
H**D
Not bad as a charging cable...
Positives:As a coiled charging cable, it does the job,Seems better constructed than most cheap cablesNegatives:I've noticed my nexus 5p charges slower with this.
A**R
It works except where I needed it. It takes ...
It works except where I needed it. It takes considerable force to reach the full 3 feet extension promised.
W**M
Five Stars
Great USB C cable and is really convenient to have the coiled wire.
D**D
Fails CheckR
On White Colored Model. Fails CheckR on Nexus 6P.
N**K
One Star
Didn't work. Returned.
S**N
Five Stars
Seems to work for rapid charging.
Trustpilot
1 month ago
1 month ago