If, for example, had a hypothetical circuit with a 12 volt battery and a 100 ohm resistor in it. As the current circles, as it heat disappates thought the resistor and now a lower amount of current is flowing back to the battery - does the current lose any "power" and replenish while travelling back through the battery? Or does the voltage stay the same (assuming the voltage magically never runs out) except current has slown down? And as the current races by the resistor multiple times will the current ever eventually slow to a halt? I'm trying to understand the concept. Thank you!!!