FIELD: electricity.
SUBSTANCE: rechargeable electric device contains an electric motor, power supply, which is an accumulator battery and which applies voltage across the electric motor, a voltage comparison device, which compares power supply voltage with reference voltage, and an alarm device for generating an alarm signal in accordance with the comparison result from the voltage comparison device. The device continues to work after an alarm signal is given by the alarm device when the power supply voltage falls to the reference voltage or below reference voltage until activation of the electric motor is blocked.
EFFECT: elimination of the memory effect of the accumulator battery.
6 cl, 2 dwg
