Electronic device case for mobile point of sale

A method of performing power management in a case for a mobile computing device, the method comprising:

• limiting electrical current received at the case to a current limit, wherein the electrical current is received from a power source connected to the case;
• commanding the computing device to consume no more than a specified amount of the received electrical current by transmitting a data communication from the case to the mobile computing device indicating the specified amount of the current;
• monitoring an amount of the electrical current consumed by the computing device;
• and
• distributing a balance of the current limit not consumed by the computing device to components of the case, wherein the components of the case include a rechargeable battery, a payment card reader, and a bar code scanner.

A charging station comprising:

• docking locations for a plurality of electronic devices;
• and
• charge control circuitry configured to:
• determine a number of the electronic devices docked in the docking locations;
• determine available current;
• determine an allocation of the available current for each of the electronic devices docked in the charging station based on the available current and based on the number of the electronic devices;
• and
• limit current consumption of one or more of the docked electronic devices based on the allocation by transmitting a command to at least one of the one or more docked electronic devices, the command including an instruction to the at least one of the one or more docked electronic devices to limit the current consumption.