Patent ID: 11949263
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  Y | IPC H

Claim 9:
10. A method of operating a portable power source comprising:
receiving a first power tool battery pack at a first power tool battery pack port supported by a housing of the portable power source;
receiving an energy storage device at a receptacle formed in the housing of the portable power source, the energy storage device not configured to be received by the first power tool battery pack port;
controlling, by a controller having an electronic processor, circuitry to provide direct current (“DC”) power from the energy storage device to an inverter when a state of charge of the energy storage device is above a first voltage threshold;
controlling, by the controller, circuitry to provide DC power from the first power tool battery pack to the inverter when the state of charge of the energy storage device is below the first voltage threshold or the energy storage device is disconnected from the receptacle;
inverting, by the inverter, the received DC power to alternating current (“AC”) power; and
providing the AC power to an AC output.