Electronic device case

A protective enclosure for a mobile computing device, the protective enclosure comprising:

• a hard shell that protects the mobile computing device;
• an interface to a battery;
• and
• a computer processor configured to execute the instructions to:
• determine a current limit for the mobile computing device based on an amount of electrical current consumed by the protective enclosure;
• and
• supply electrical current to the mobile computing device up to the determined current limit.

A method of performing power management in a case for an electronic device, the method comprising:

• when the case is receiving power from an external power source:
• limiting the power received from the external source based on a current limit associated with the external power source;
• distributing a first portion of the received power to the electronic device;
• and
• distributing a second portion of the received power to circuitry for charging a battery of the case;
• and
• when the case is not receiving power from the external source:
• distributing supplemental power from the case battery to the electronic device.