A tablet computer includes a housing, a display, a processing system, a camera system comprising a camera sensor, and a battery system, the battery system positioned within the housing. The battery system is configured to charge an external device. A charging cable retainer is configured to retain one or more cables against or within the housing. One or more integral cables are provide. The one or more integral cables include a cable comprising a first end fixedly coupled to the battery system, a first connector of a first type configured to mate with a first type of external device connector, a second connector of a second type configured to mate with a second type of external device connector, and a lens configured to form images on the camera sensor. The charging cable retainer includes a cable channel or magnet.