An electric tool comprising: a removable battery pack as a power supply; a motor as a power source; a drive unit configured to be driven by said motor; a switch as an operation input unit; and a control circuit configured to control the driving of said motor according to the operation of said switch, wherein the electric tool comprises: a power supply connection unit that is configured to enable a plurality of battery pack types, which have different rated output voltages, to be selectively connected; and an identification means that is configured to identify the type of said battery pack that has been connected, wherein said control circuit is configured to, when a rated output voltage of said battery pack that has been connected is determined to be higher than a rated output voltage in accordance with characteristics of said motor based on identification information provided by said identification means for the type of said battery pack that has been connected, perform PWM control to limit an output of said motor to an output of said motor obtained upon connection with a battery pack having a rated output voltage equal to or lower than the rated output voltage in accordance with the characteristics of said motor. a removable battery pack as a power supply; a motor as a power source; a drive unit configured to be driven by said motor; a switch as an operation input unit; and a control circuit configured to control the driving of said motor according to the operation of said switch, wherein the electric tool comprises: a power supply connection unit that is configured to enable a plurality of battery pack types, which have different rated output voltages, to be selectively connected; and an identification means that is configured to identify the type of said battery pack that has been connected, wherein said control circuit is configured to, when a rated output voltage of said battery pack that has been connected is determined to be higher than a rated output voltage in accordance with characteristics of said motor based on identification information provided by said identification means for the type of said battery pack that has been connected, perform PWM control to limit an output of said motor to an output of said motor obtained upon connection with a battery pack having a rated output voltage equal to or lower than the rated output voltage in accordance with the characteristics of said motor. a power supply connection unit that is configured to enable a plurality of battery pack types, which have different rated output voltages, to be selectively connected; and an identification means that is configured to identify the type of said battery pack that has been connected, wherein said control circuit is configured to, when a rated output voltage of said battery pack that has been connected is determined to be higher than a rated output voltage in accordance with characteristics of said motor based on identification information provided by said identification means for the type of said battery pack that has been connected, perform PWM control to limit an output of said motor to an output of said motor obtained upon connection with a battery pack having a rated output voltage equal to or lower than the rated output voltage in accordance with the characteristics of said motor.