An electrical tool is disclosed that includes a pipe holder, a knife that is rotatably coupled to the pipe holder, and a drive mechanism that is coupled to the pipe holder and / or the knife. The electric tool further includes a motor coupled to a drive mechanism and a removable and rechargeable battery pack coupled to the motor for selectively delivering power signals to the motor. The electrical tool further includes a controller that is configured to monitor several states of the electrical tool, such as the battery pack voltage, the battery pack temperature, the operating current and the like. The control is also designed to detect one or more events that are linked to several states of the electrical tool. For example, the controller is designed to monitor the operating current of the electrical tool. If the operating current of the electrical tool exceeds a first threshold value, a power signal duty cycle is reduced from a first duty cycle value to a second duty cycle value to reduce the magnitude of the torque that the electrical tool can generate.
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