Sourcing power from a battery or AC-DC converter of a power storage adapter

A method for supplying power to a power consuming device, comprising:

• when an AC-DC converter of a power storage adapter (PSA) is coupled to AC line power and a power consuming device is coupled to the power storage adapter over a variable power bus, and responsive to receiving a request for the power storage adapter to supply electrical power to the power consuming device at a particular voltage:
• determining, based on an operating parameter of the power storage adapter, one of an output of the AC-DC converter or an output of a battery within the power storage adapter as a selected source for supplying electrical power to the power consuming device;
• and
• causing power distribution circuitry within the power storage adapter to supply electrical power from the selected source to the power consuming device over the variable power bus at the particular voltage;
• wherein the particular voltage is one of a plurality of output voltage levels at which electrical power is supplied by the power distribution circuitry within the power storage adapter.

A system, comprising:

• an information handling system including an internal port for coupling the information handling system to a variable power bus;
• and
• a power storage adapter (PSA) comprising:
• a PSA port for coupling the power storage adapter to the information handling system over the variable power bus;
• a battery;
• an AC-DC converter;
• power distribution circuitry to supply electrical power from the power storage adapter at a plurality of output voltage levels;
• and
• a PSA controller, wherein the PSA controller comprises circuitry to:
• when the AC-DC converter is coupled to AC line power and the information handling system is coupled to the power storage adapter over the variable power bus through the port, and responsive to a request for the power storage adapter to supply electrical power to the information handling system at a particular voltage:
• determine, based on an operating parameter of the power storage adapter, one of an output of the AC-DC converter or an output of the battery as a selected source for supplying electrical power to the information handling system;
• and
• cause the power distribution circuitry to supply electrical power from the selected source to the information handling system over the variable power bus at the particular voltage;
• wherein the particular voltage is one of the plurality of output voltage levels.