Abstract: An exemplary rapid electrical charging system is disclosed for autonomous electrical vehicle refueling. The system can be used for in-air refueling, on-the-ground refueling, and refueling application. The system employs a charging and disconnects circuit and associated connection hardware at the autonomous electric vehicle and the charging vehicle to facilitate fast charging of the autonomous electrical vehicle while the battery system of the autonomous electrical vehicle is in use. The rapid electrical charging system located on the charging vehicle can optimally (i) power the aircraft systems of the autonomous electrical vehicle, (ii) transfer power to the onboard battery of the autonomous electric vehicle while isolating the battery from the onboard loads, and (iii) subsequently transition the autonomous electrical vehicle to its onboard battery power. The rapid electrical charging system may include a secondary charging circuit to charge/balance individual cell of the onboard battery.