External Power Supply For Servo Motors

Ok So, Im using 4 Servo Motors In My Project. But I Need To Use External Power Supply For Powering. Which one should i use?

The one that meets your unstated requirements.

Im using 4 sg90 and they are moving at same time. I need to find 750*4 = 3000 mA power supply. so what can i use?

For how long?
How far from a mains outlet?

For how long?

As long as i use them? (i didnt understand what you meant)

How far from a mains outlet?

idk maybe 1-2 meters?

EDIT: I found this power bank, Xioami PB3018ZM. It shows Type-C Out Voltage Is 5V, Amper Is 3A.
I can use it too idk

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