A control apparatus of a hybrid vehicle is provided, capable of charging the battery device when the state of charge of the battery device tends to decrease and the initial state of charge of the battery device is reduced by a predetermined amount. In one embodiment, a VSCF device may include at least two paths for conducting power to the load. The arrangement of the members and hand grip portions permit gripping thereof by the diver so that the drag forces of the diver input the forces needed to control the device, requiring little or no additional effort on the part of the diver. Each of the protrusions is provided with a flange. Apparatuses are provided which include an instrument having an integrated digital signal processor for performing digital processing and detection for use in optical tomography. The controller is further configured to disable charging when the present charge value corresponds to the charge level selection.