A protective case for an electronic device includes first and second case portions, a rechargeable battery, first and second electrical connectors, a switch, and electrical circuitry. The second case portion is removably attachable to the first case portion. The first electrical connector is accessible at an outer surface of the second case portion for electrically connecting to an external power source. The second electrical connector is accessible at an inner surface of the second case portion for electrically connecting the protective case to the electronic device. The switch is accessible on the second case portion and is user operable. The electrical circuitry distributes the received electrical power to the electronic device and to the rechargeable battery. The electrical circuitry also distributes stored electrical power from the rechargeable battery to the electronic device. Distribution of the stored electrical power to the electronic device is conditioned upon a state of the switch.