Abstract: A power tool, includes an electrical motor unit connectable to a battery unit, wherein: a step-up converter, connectable between the battery unit and electrical motor unit, converts a battery voltage Ubattery provided by the battery unit to a higher step-up voltage Ustep-up, and provides Ustep-up to the electrical motor unit as an output voltage Uoutput; a bypass circuit, arranged in parallel with the step-up converter, connects the battery unit to and provides Ubattery to the electrical motor unit as Uoutput; and at least one control unit is arranged to control the step-up converter and the bypass circuit, such that Uoutput can switch between Ubattery and Ustep-up, based on tool related parameters, including Uoutput, an output current Ioutput provided to the motor, a rotational speed ?motor of the motor unit multiplied with a torque T provided by the tool, and an output power Poutput provided to the electrical motor unit.

Abstract: A power tool, includes an electrical motor unit connectable to a battery unit, wherein: a step-up converter, connectable between the battery unit and electrical motor unit, converts a battery voltage Ubattery provided by the battery unit to a higher step-up voltage Ustep-up, and provides Ustep-up to the electrical motor unit as an output voltage Uoutput; a bypass circuit, arranged in parallel with the step-up converter, connects the battery unit to and provides Ubattery to the electrical motor unit as Uoutput; and at least one control unit is arranged to control the step-up converter and the bypass circuit, such that Uoutput can switch between Ubattery and Ustep-up, based on tool related parameters, including Uoutput, an output current Ioutput provided to the motor, a rotational speed ?motor of the motor unit multiplied with a torque T provided by the tool, and an output power Poutput provided to the electrical motor unit.