If you are using a hub that backfeeds to the raspberry pi and the hub experiences a power surge your raspberry pi could potentially be damaged.
Pi power cable.
When you have a generic usb power adapter you ll need a us to micro usb cable to connect that power to your raspberry pi.
You also may have an official raspberry pi power supply but need extra length in the wire use our 4m micro usb extension cables to give you much more reach and flexibility.
This means that the hubs will power the raspberry pi through its usb cable input cable without the need for a separate micro usb power cable and bypass the voltage protection.
This didn t affect the usb c cable and power adapter that shipped with the raspberry pi 4 desktop kit nor should it affect any future raspberry pi 4s you buy but it s definitely something to.
If the cable you planned on using to power your pi 4 does not work using a usb c phone charger or an older charger with a type c adapter is suggested as they are less likely to use e marker chips.
While a hardware revision is the best way to handle this there are other options for makers with the current version of the pi 4.
This technology uses a standard ethernet cable to send power to a special add on board fitted to a raspberry pi.