Device and method for charging vehicle batteries efficiently

The method involves charging connected vehicle batteries (S1) from an initial charge state based on a calculated charge priority value until the charge state of the vehicle battery reaches a selectable charge state, where the calculated charge priority values of the vehicle batteries connected to a collection charging station are utilized for determining which battery is charged within a charging interval. The charge priority value is calculated as a function of the missing charge quantity to reach the final charge state and a deviation of the instantaneous charge state of the battery. An independent claim is also included for a collection charging station.