Thanks for the tip.

I have now ordered this 12V powered USB hub:
www.tp-link.com/us/home-networking/usb-hub/uh700/

I only plan to use my power supply (5V/3A) for powering the Pi4.
And then I have a Lemus Powerbox with 3x 12V DC ports and a 230V EU power socket for the electronic automatic focuser, dew heater and the powered USB Hub.
And I have a jump starter with 1x 12V car cigarette lighter socket (will be used for camera cooling)

Your Li 12V power bank looks very nice thou pricey. I use a classical 7Ah lead Celestron Power Bank at €70 from Amazon.de, very reliable and plenty of energy.

Let us know how it proceeds and thank!

Cheers,
Z

Per getting the time (and position) from your CEM-25P: Yes, this definitely works, and is how I run my RPi4/SM 1.5.2/CEM-25P. It's in KStars | Settings | Configure KStars | INDI | Mount updates KStars if memory serves.

Yes, I also find it pretty pricey but I like that it has 3x 12V output and with the 230V output it is also useful when I go camping with my family.
I believe that the specs of mine are similar to this one from Bresser:
www.astroshop.eu/battery-packs/bresser-m...ion-100-watt/p,63756

I also have a normal cheap powerbank that has 2x USB output with 5V/2.1A each
ongadgets.dk/produkt/powerbank-20000mah-fast-charger-hoco-b31b/

I plan to use that with two converter cables 5V to 12V (Output 12V/0.7A)
www.amazon.co.uk/gp/product/B01ID90K4A/

So hopefully I won't run out of power options