Power management in electronic device case

A protective case for a mobile electronic device, the protective case comprising:

• a rechargeable battery;
• a first electrical interface configured to receive electrical current from an external power source when the external power source is connected to the first electrical interface;
• a second electrical interface configured to transmit a data communication from the protective case to the mobile electronic device to command the mobile electronic device to consume no more than a specified amount of the received electrical current;
• and
• electrical circuitry configured to:
• monitor an amount of the received electrical current consumed by the mobile electronic device;
• and
• distribute at least a portion of the received electrical current not consumed by the mobile electronic device to the rechargeable battery of the protective case.

A protective enclosure for an electronic device, the protective enclosure comprising:

• a first case portion;
• a second case portion removably attachable to the first case portion to enclose at least a portion of the electronic device;
• a rechargeable battery;
• a first electrical connector for electrically connecting the protective enclosure to an external power source and for receiving electrical power from the external power source when the external power source is connected to the protective enclosure through the first electrical connector;
• a second electrical connector for interfacing the protective enclosure to the electronic device;
• and
• one or more computer processors configured to:
• distribute a limited amount of the received electrical power to the electronic device through the second electrical connector and distribute a remaining portion of the received electrical power to the rechargeable battery of the protective enclosure when the protective enclosure is connected to the external power source through the first electrical connector;
• and
• distribute electrical power from the rechargeable battery of the protective enclosure to the electronic device through the second electrical connector when the protective enclosure is not connected to the external power source.