A system is provided that comprises a patient support apparatus and a unit being independent from the patient support apparatus. The patient support apparatus comprises a support structure having a base and a patient support surface for a patient. The patient support apparatus also comprises an electrical distribution system, one or more electrical devices, and an energy storage device (ESD) configured to store energy to power the one or more electrical devices through the electrical distribution system. The unit is configured to autonomously interact with the patient support apparatus to remove the ESD from the patient support apparatus and/or to place a replacement ESD on to the patient support apparatus.