Patent ID: 11944176
Assignee: SPUR CONCEPTS INC
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC A  H | IPC A  H

Claim 0:
1. A battery-operated hair dryer, comprising:
a heating element positioned within an air flow channel; and
control circuitry coupled to the heating element and powered by at least one battery, the control circuit having an algorithm configured to determine the battery state-of-charge in real-time, calculate the remaining battery life before depletion, and determine a power mode setting to alter the power to the heating element to maximize the remaining battery life, and alter the power to the heating element for the power mode setting including multiple steps of power reduction;
wherein the multiple steps include 100% or full power to the heating element until the algorithm calculates that there is 4 minutes (of full-power) of battery life remaining, the power is then stepped down to 50% power until the algorithm calculates that there is about 45 seconds (of full-power) battery life remaining, and the power to the heating element is stopped and the hair dryer switches to cool shot to blow air until the battery is depleted.