Patent ID: 11871487
Assignee: MILWAUKEE ELECTRIC TOOL CORPORATION
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H  F  Y | IPC F  H

Claim 12:
13. A portable lighting device comprising:
a housing;
a light source supported by the housing;
an alkaline battery positioned within the housing and coupled to the light source, wherein the alkaline battery is configured to provide a drive current to the light source and an intensity of the light source is dependent on the drive current; and
an electronic processor positioned within the housing and coupled to the light source and the alkaline battery, wherein the electronic processor is configured to
monitor a time that the light source has been operating, and
execute a ramp-down algorithm to control the drive current based on the time that the light source has been operating;

wherein the electronic processor is configured to execute the ramp-down algorithm by repeating steps of:
decreasing the drive current, and
delaying a predetermined time period.