So if USB stands for universal serial bus, that, to me, means there is only one stream of charge, however some cables are significantly faster than others. Is this due to the width of the cable? Or quality of the material in the cable?
In: Technology
The cables themselves usually aren’t what makes the difference.
There is some impact of the resistance due to length, diameter and material of connectors of cables, but that is not really the big thing.
What usually makes the difference is the small box between the wall outlet and the cable.
The original USB Standard didn’t anticipate having to power much more than for example the indicator lights on a keyboard. Most computer peripherals in those days either had their own power connectors or did not need much power at all.
Once the option of providing a bit of power over USB was there engineers too advantage of it. It became the default way to power small electronics that didn’t need much power.
However moder phones can draw much more power than was described in the original standard. To do this via USB manufacturers have expanded the original standard so the device and the charger talk to one another about how much they both can do.
Phones can still charge at the old default rate without that it will just take longer.
Modern versions of USB have higher power draw build in the standard, but that only works if both sides can do it.
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