Quoting OSTz on Reddit (https://www.reddit.com/r/UsbCHardware/comments/10xj74r/why_d...):
> Direct USB-C to USB-C extensions are explicitly forbidden for safety and performance reasons because they defeat built-in safety mechanisms.
> All USB-C to USB-C cables should support 60W charging, but there are also cables that support 100W and 240W. USB-C chargers and devices identify a cable's capabilities by reading what's known as an electronic marker (e-marker) inside the cable that explicitly reports >60W charging and/or 5Gbps or faster data transfer capabilities. A USB-C charger will first read a cable's e-marker and adjust its power output based on what the connected cable's maximum charging capacity is.
> The problem with extension cables in general is that they don't (and can't) have an e-marker, since by design, normal cables only have one addressable e-marker. Therefore, neither the device nor the charger is aware of the presence of an extension. If your USB-C to USB-C extension only supported 60W, and you connected it to a charger/device combo that could do 100W or more, you could start a fire. This failure is particularly insidious because it can potentially lull the user into a false sense of security; everything might work as expected until they change something, like upgrading the charger, and then it could fail catastrophically.
> Another reason extension cables don't work well is that the signal integrity requirements for USB-C's higher transmission rates are very strict. Believe me when I say that cable makers would make longer cables if they could.
I bought a cheap set off of Amazon, and then realized I also wanted non-USB-C tips as well. While the brand I bought wasn't selling them, turns out that the same factory manufacturing them also manufactures for other brands, and so on like the third page of Amazon results I found another product using the exact same tips, but this time also including other types!
I've had MacBooks for two decades. Until my recent purchase of an Apple Silicon model, they all used proprietary power connections (first barrel, then MagSafe) on one side of the computer. Since I needed a power supply in two different places, this always meant obtaining a second Apple charger.
My current MacBook is the first I've owned that also allows charging from any USB-C port. For the first time, I can
* use a small USB charger I already owned (A 27W unit in my case. Yes, the computer does charge under use, albeit slower than with the Apple charger)
* charge on the opposite side of where the Apple charger goes (which is very useful for my aforementioned multiple-location usage pattern)
* still have an auto-detachable connection by, like you, using a magnetic USB connection (<https://www.amazon.com/gp/product/B0BCJVL7CD/> is what I use)
Most of them could be better, have fewer people, be more focused, etc. -- sure, no doubt. But you can't make every meeting into an action-packed saturday morning cartoon.
Like, these compliance forms ain't gotta fill themselves out, and each team has to be there. These JIRA and code-review meets are gonna be lame, but we gotta do em...
And if you specifically mean the cheapest possible models, yes wired will have cable noise, but wireless will have horrible connection and battery issues, so let's assume we are talking about a good above-average model and in that case you can expect no cable noise.
edit oops there was already a whole comment thread lower on the page essentially saying the same things, sorry about that
It is also easy for the magnetic connector to short the power into a data line, and because it doesn't connect in the proper pin order and has no 'mid-plate' it has no mitigation against arcing. See this picture:
Notice how some pins are longer than others? They are designed that way so that they connect first and disconnect last, so that ground is always established before and after other pins connect. This prevents connecting and disconnecting a cable from frying your electronics.
"The mid-plate shall be connected to the PCB ground with at least two grounding points. The mid-plate shall be designed such that plug pins A4, A5, A6, A7, A8, A9, and B4, B5, B6, B7, B8, B9 do not short to ground during the connector mating process with an effective 6.2 mm receptacle shell implementation." [1]
[0] USB Type-C Spec R2.2 - October 2022, Figure 3-13, Page 65.
[1] USB Type-C Spec R2.2 - October 2022, Section 3.2.1 Interface Definition, Page 43.
* https://www.usb.org/document-library/usb-type-cr-cable-and-c...
Almost everything I have now uses USB-C. The few micro USB and Lightning devices hanging around don’t have the same high current concerns.
It could've also been the USB hub I was using, but the problem disappeared once I changed the USB cable with magnetic adapters to a cable with ordinary connectors.
The data ones are almost universally sketchy, as they expose pins (and sensitive internal circuitry) that should absolutely be kept away from the outside world.
There is an emerging range that reduce the exposure somewhat, but I’m still wary.
* https://i.imgur.com/n3IjcQE.png
I encourage everyone to actually read the USB 3.2/C/PD spec sheets.
Aside from that: It's obviously not enough for a laptop, but what other devices do you really need that much more for in your day-to-day life? I think I haven't used a USB charger capable of outputting more than 10W in a while (aside from my Nintendo Switch and its charging brick, but because of the dock it wouldn't make much sense to use a magnet adapter anyway). At home, there's always a charger nearby, and when I leave the house my phone usually has enough power anyways, or the trip is long enough for me to throw a powerbank in my backpack no matter how full the phone battery is.
And if you end up in a situation where you really need to quick-charge something, there's nothing stopping you from just taking the plug out for a short while.
Or, just 'don't use shady spec violating components that don't exist in spec for good reasons'?
> Also, do devices like that actually respect that 900mA thing, assuming they're capable of pulling that much power?
USB-C will not 'give it' power unless it conforms to certain parameters like having a resistor on the CC line. This is the reason that crappy devices which merely changed the physical ports from micro-USB to USB-C and come with a USB-C (device end) to USB-A (charge end) will not charge with a USB-C to USB-C cable. The device never got updated to request the power and the USB-C port on the charger just ignores it.
How no colleague ever informed me, I can only speculate.
I thought my old headset (Logitech G930) did, until I found out the hard way that it was in fact just sending a software command to mute the mic at the system level, and that if the headset was turned on while plugged in to external power it would not properly communicate any inputs to the host system.
Audio still worked perfectly, but volume controls, the "G Keys", and most importantly mic mute did not work in this state. The red light at the tip of the mic would come on but nothing actually changed and audio was always being transmitted to the host PC (which I guess was always true, but the host PC now wasn't muting it either).
I found this out during a lunch break on a multi-day training session, where I let out a Barney Gumble class belch with my mic in the up/off position and the background chatter in the conference call fell silent until someone commented about how my lunch must have been good. After figuring out what happened I then wondered how much had been heard on previous days, but never got around to going back and listening through the session recordings to figure it out.
In addition to protecting against technical failures like you describe, I also don't get in the habit of saying stuff that one day I could accidentally say on a blatantly hot mic or in front of someone else.
The only mute button I really trust is the one inside my head.
The Blueparrott B450-XT is an amazing headset. Did I buy it at a truck stop? Yeah. But I've been on an audio call where I literally stood in front of a box fan with my face against the fan and nobody could hear the fan in the microphone at all. The noise cancellation on the mics is downright amazing and everyone heard me loud and clear over fans, datacenter environments, the works.
Also, some of those magnetic USB charging cables to keep them charged without fiddling with plugging in cables. The nice thing about these is that the same magnetic cable can attach to both microUSB and USB-C dongles, so you can charge any small device with one cable. And the dongles are tiny so you just put them into all your devices and leave them there, super convenient.