Disclosed embodiments relate to weight modules for use in a wellbore tool string. In some embodiments, the weight module may comprise a conductive body, extending in an axial direction, and an insulating cover. The conductive body may be configured to fit within a hollow interior of a weight module housing, and the insulating cover may be configured to electrically isolate the conductive body from the weight module housing. In some embodiments, the conductive body may have a first contact portion, provided at a first end of the conductive body, and a second contact portion, provided at a second end of the conductive body, with the first contact portion in electrical communication with the second contact portion through the conductive body.