A power tool comprising: an interface having: a support arrangement arranged to support a portable electronic device having a display for the display to be viewed by a user during operation of the power tool ; a data communication module arranged to form a data connection for communicating data between the power tool and the portable electronic device for displaying, at the display of the portable electronic device , the data transmitted from the power tool during operation of the power tool when the portable electronic device is supported by the support arrangement and operably connected to the data communication module; and a power transmitter arranged to transmit electrical power from a power source of the power tool to the portable electronic device for energizing a power supply of the portable electronic device during operation of the power tool when the portable electronic device is supported by the support arrangement and operably connected to the power transmitter; characterised in that the support arrangement has a back rest with a base and an adjustable decline relative to the base, the back rest being arranged to support the portable electronic device , and the portable electronic device comprises a tablet computer or a smart phone. an interface having: a support arrangement arranged to support a portable electronic device having a display for the display to be viewed by a user during operation of the power tool ; a data communication module arranged to form a data connection for communicating data between the power tool and the portable electronic device for displaying, at the display of the portable electronic device , the data transmitted from the power tool during operation of the power tool when the portable electronic device is supported by the support arrangement and operably connected to the data communication module; and a power transmitter arranged to transmit electrical power from a power source of the power tool to the portable electronic device for energizing a power supply of the portable electronic device during operation of the power tool when the portable electronic device is supported by the support arrangement and operably connected to the power transmitter; a support arrangement arranged to support a portable electronic device having a display for the display to be viewed by a user during operation of the power tool ; a data communication module arranged to form a data connection for communicating data between the power tool and the portable electronic device for displaying, at the display of the portable electronic device , the data transmitted from the power tool during operation of the power tool when the portable electronic device is supported by the support arrangement and operably connected to the data communication module; and a power transmitter arranged to transmit electrical power from a power source of the power tool to the portable electronic device for energizing a power supply of the portable electronic device during operation of the power tool when the portable electronic device is supported by the support arrangement and operably connected to the power transmitter; characterised in that the support arrangement has a back rest with a base and an adjustable decline relative to the base, the back rest being arranged to support the portable electronic device , and the portable electronic device comprises a tablet computer or a smart phone. <EOS>