Hello, I need to  to use Tapo C200 with a Battery or Powrbank.

I found out that the camera needs 9V.

I bought a Powerbank that supports 9V. The camera worked for about 24 hours, then it stopped working using the powerbank. The camera still works when I use the standard cable plugge into the standard plug socket.

The camera must work, even in the event of a blackout

Is there a solution to my needs?