3-Pack (6.6'/10') Ainope USB-C to USB-C 100W Nylon Braided Cable (Right Angle) Expired

It's a limitation of physics. When you send electricity down a wire, some of it turns into heat, causing the voltage of the signal to drop. If it drops too much, the receiving device can't recognize it (if it's data), or it's not sufficient to power the device (if it's power). The amount of voltage drop depends on (1) composition of the cable, (2) length of the cable, and (3) diameter of the cable. If you assume all cables are using copper, then it becomes a tradeoff between length and diameter. The longer you make the cable, the thicker it needs to be to work as intended.

So in these longer USB-C cables intended for power, they use thicker wires for power combined with thinner wires for data, in order to keep the total cable thickness down. That means a cable capable of carrying 100W won't be able to hit high data speeds, and vice versa. Unless you're willing to cope with a much thicker cable (which is harder to coil). Likewise, a USB-C cable capable of multi-gigabit Thunderbolt speeds, won't be able to transmit as much power (unless it's really short or thick).

(There's also (4) Voltage. The higher voltage you use, the less loss there is. But most specs fix the voltage so it's typically not something you can vary. However, it is possible to boost the voltage, send it over a thin cable with less loss, then drop the voltage again to match the input voltage. The Redmere HDMI cables did this so you could have longer cables without needing them to be ridiculously thick.)

And no, extension cords can't all carry 110V. If it's made of 16 gauge wire, the 110V usually drops to about 95-100 V after 50 ft. That's low enough that sensitive devices won't work. Not to mention if the device you plug in is drawing 1000W, then the extension cord is heating up by over 100W and the casing will probably melt after a few minutes. If you instead use, say 12gauge (thicker) wire it usually maintains about 105-108 V.


That's not really the cable's fault. Because USB didn't set a standard for fast charging, manufacturers came up with all sorts of tricks to add fast charge capability. A favorite one was to make the USB connector a little longer than standard, add extra pins further inside the connector. So if you plugged the manufacturer's cable into the manufacturer's adapter, these extra pins would be connected and allowed the device to fast charge. But if you used a regular cable or regular adapter, these extra pins don't connect or don't exist, and there's no way to fast charge.

Incidentally, USB-C PD (power delivery) is a standard where the device and charger can negotiate a voltage. Higher power devices request a higher voltage, allowing the adapter to deliver more power over the same thickness cable. For this reason, I think it's the first DC power standard which has a good chance to (finally) supplant the ubiquitous 12V cigarette adapter.

sync: USB 2.0, 480Mbps. Can transfer 1Gb file within 30s. It's not a USB3.0/4k cable.

Bought one last year，well built, has good shielding, despite usb 2.0, they are solid charging cables.