According to the electric power formula, power is equal to voltage x current, and maximum power is maximum voltage x maximum current.
Here are a few examples:
Xiaomi’s 6A USB-A to USB-C cable, with a maximum voltage of 20V and a maximum current of 6A for private protocols, so it can support up to 120W(20V/6A) MiPPS, and is backward compatible with 67W(11V/6A), 55W(11V/5A), 40W(10V/4A), 33W(11V/3A) MiPPS.
Huawei’s 6A USB-A to USB-C cable has a maximum voltage of 20V and a maximum current of 6A in private protocol, so it can support up to 120W SCP, but there is no such charging specification for cell phones at the moment, and the highest one is 100W (20V/5A) SCP, which is backward compatible with 66W (11V/6A), 40W (10V/4A), 22.5W (10V/4A), and 22.5W (10V/4A), and the highest charging specification is 100W (20V/5A) SCP. 2.25A or 5V/4.5A) SCP.
The USB-C to USB-C cable from a third-party accessory company is advertised as 60W, and the third-party company does not have a private agreement. Then it can be inferred that the max voltage is 20V and the max current is 3A. take it to fast charge a cell phone/laptop with a max current of 3A.
A third-party accessory company’s USB-C to USB-C cable advertises 100W, and the third-party company does not have a private agreement. Then it can be inferred that the maximum voltage is 20V, the maximum current is 5A, and the maximum current is 5A when it is used for fast charging a cell phone/laptop.
Apple’s USB-C to USB-C cable has an advertised power of 60W, because Apple does not have a private agreement. Then it can be inferred that the maximum voltage is 20V and the maximum current is 3A. take it to other cell phone/laptop for fast charging, the maximum current is 3A.
Apple’s USB-C to USB-C cable advertises 240W of power, because Apple does not have a private agreement, then it can be inferred that the maximum voltage is 48V, the maximum current is 5A, and supports PD 3.1 fast charging. Take it to other phones/laptops for fast charging, max current is 5A.
OPPO’s 12A USB-C to USB-C cable has a maximum voltage of 20V and a maximum current of 12A when using the private protocol, so it can support up to 240W SuperVOOC (20V/12A), and is backward compatible with all OPPO’s flash charging protocols except 11V 13.7A. Take it to other phones/laptops for fast charging with a max current of 5A.
