Voltage control at low temperature to avoid undervoltage switch-offs in battery-powered, hand-operated electric tools

An electric tool, operated independently of the mains, comprising:

• an electric motor;
• a battery;
• a monitoring device for monitoring a monitoring operation-value limit, wherein the monitoring operation-value limit lies above an operation-value limit of the battery;
• an adjustable resistor component;
• and
• an operation-value controller for setting at least one operation-value of the electric motor by pulse width modulation (PWM);
• wherein a PWM duty cycle of the operation-value controller is specified to set the at least one operation-value, which corresponds to a first value or a second value, wherein the first value is derivable from a current setting of the adjustable resistor component and wherein the second value corresponds to a PWM duty cycle last used for setting the at least one operation-value plus an offset value;
• wherein for setting the at least one operation-value, a lower of the first value or the second value is selected for the PWM duty cycle, if an operation-value of the battery lies above the monitoring operation-value limit;
• and wherein the offset value corresponds to a percentage of a last used PWM duty cycle for controlling the electric motor.