Abstract: A mobile lift device includes a body supported on a driven wheel and a lift supported by the body and configured for vertical movement relative to the body. The lift is configured to support a load. An electric drive motor is configured to cause rotation of the driven wheel and a drive motor brake is coupled to the motor. An electromechanical linear actuator is configured to raise and lower the lift and includes an electric actuator motor. A controller is configured to determine the weight of the load. In one embodiment, the controller determines the weight by determining a level of current required by the electric actuator motor. The controller controls at least one of the electric drive motor and the drive motor brake responsive to the weight of the load.