In an example, a power source for an electric propulsion system of an aerial vehicle includes a body having an electrical energy storage device configured to store electrical energy. The power source also includes a plurality of terminals coupled to the electrical energy storage device for supplying the electrical energy from the electrical energy storage device to the electric propulsion system of the aerial vehicle. The power source further includes a plurality of flight control surfaces extending outwardly from the body. The flight control surfaces are actuatable to adjust a flight attitude of the power source. Additionally, the power source includes a flight control system including a processor and configured to actuate the plurality of flight control surfaces to fly the power source to a target location when the power source is jettisoned from the aerial vehicle.