I have two used power banks from Joy company.
20 thousand mAh with two Type-C ports and one USB port. The power of the ports is mentioned in the picture.
For 40 SAR.
And I have 10 thousand mAh with two USB ports, one Type-C, and one Micro USB. Their power is mentioned in the picture.
For 20 SAR.
The chargers are working and have no issues, but the small one has a scratch as shown in the picture.
(I don't know if they are allowed on airplanes or not)