I have read in one book that:
the potential difference between the plates of a capacitor when it's connected to a DC source (a battery) is in opposite direction to the potential difference of that battery.
I don't really get that point, and I don't know how could this help in the break of the DC after the capacitor charges. I used to think that when connecting a battery to a capacitor the plate connected to the positive terminal gets a positive charge and the plate connected to the negative terminal gets a negative charge. So, how will the PD be in the opposite direction to the PD of the battery? Could someone clarify it?