Hello
Is it possible to connect another voltage source to the Jst socket. For example a power bank?

Yes, just make sure you're not supplying too much voltage. Most of our products are rated 3-5V. You can also power the TV using the Micro USB connector on the top of the screen board/housing.

We have the correct JST connectors stocked here: https://tinycircuits.com/products/jst-sh-2-pin-connector

Cheers,
Réna

Thanks for the quick and detailed answer. I can work with that.
Best regards
Christian