@schlabbermampf - Your picture shows 12 servos being driven from one battery. That's a lot if they are all running at the same time. You might be able to get away with that if only one servo moves at a time and they have no static load. But otherwise you will need to give some serious thought to a big battery with thick wires and serious connectors.
Best posts made by paulhdietz
RE: Making a Robot: USB-C -> ATOM -> 2x SERVO2 ?