Dynamic current redistribution for portable electronic devices

A system comprising:

• an electronic device comprising a first processing unit, a first battery configured to provide power to the first processing unit, and at least one memory storing computer-executable instructions;
• and
• an external power storage device electrically coupled to the electronic device;
• wherein the first processing unit is configured to access the at least one memory and execute the computer-executable instructions to:
• determine that an external power source is providing a first current to the electronic device;
• determine a second current consumed by the electronic device;
• determine a third current being used for charging the first battery;
• determine a first charging current for the external power storage device, the first charging current being substantially equal to a first difference between the first current and a sum of the second current and the third current;
• provide the first charging current to the external power storage device;
• determine that the first battery is fully charged;
• in response to determining that the first battery is fully charged, provide a second charging current to the external power storage device, wherein the second charging current is greater than the first charging current;
• determine that the external power source is disconnected from the electronic device;
• determine that the first battery is discharged to a first threshold level;
• cause the external power storage device to provide a first output current to the electronic device, wherein the first output current is at least equal to the second current;
• determine that the sum of the second current and the third current is greater than the first output current;
• cause the external power storage device to provide a second output current to the electronic device, wherein the second output current is at least equal to the sum of the second current and the third current;
• and
• cause the external power storage device to charge the first battery from the first threshold level to a second threshold level that is less than fully charged and to disable charging of the first battery upon reaching the second threshold level.

A device comprising:

• an internal battery;
• at least one memory storing computer-executable instructions;
• and
• at least one processor configured to access the at least one memory and execute the computer-executable instructions to:
• determine that a power adapter is connected to the device;
• charge the internal battery at a first charging current value using current from the power adapter;
• determine that an external battery is connected to the device;
• determine that the power adapter is disconnected;
• determine that a first charge level of the external battery is greater than a second charge level of the internal battery;
• cause the internal battery to power the device;
• determine that the internal battery is discharged to a third charge level;
• in response to determining that the internal battery is discharged to the third charge level, cause the external battery to provide a first output current to power the device, wherein the first output current is at least equal to a system current consumed by the device;
• determine that a sum of a maximum charging current for the internal battery and the system current is greater than the first output current;
• and
• cause the external battery to provide a second output current to the device, wherein the second output current is at least equal to the sum of the maximum charging current and the system current.