An unmanned aerial vehicle (UAV) is disclosed that includes a power source. The power source includes: one or more power cells; one or more thermal transfer members that are thermally connected to the one or more power cells; and a heat exchanger that is thermally connected to the one or more thermal transfer members such that the one or more thermal transfer members and the heat exchanger facilitate a transfer of thermal energy between the power source and ambient air to decrease or increase temperature of the power source.