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

Claim 0:
1. 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 voltage of the alkaline battery, and
execute a ramp-up algorithm to control the drive current based on the voltage of the alkaline battery, wherein the ramp-up algorithm is executed while the light source is outputting light;

wherein the electronic processor is configured to execute the ramp-up algorithm to:
determine that the alkaline battery is partially depleted; and
in response to determining that the alkaline battery is partially depleted, incrementally ramp-up the drive current provided to the light source from the alkaline battery to a high drive current for a high mode of operation for the light source instead of initially setting the drive current to the high drive current.