9 ELECTRICAL INSTRUMENTS-NAMELY, TRI-CONTROL ASSEMBLIES FOR MONITORING GAS INSUFFLATION, LIGHT SOURCE ILLUMINATION, AND ELECTRICAL OUTPUT TO ELECTROSURGICAL CUTTING AND COAGULATION DEVICES; DUAL-CONTROL ASSEMBLIES FOR MONITORING GAS INSUFFLATION AND LIGHT SOURCE ILLUMINATION; ELECTRO-SURGERY CONTROL ASSEMBLIES; GAS INSUFFLATOR CONTROL ASSEMBLIES; RECHARGEABLE BATTERIES; BATTERY-CHARGING DEVICES; BATTERY ADAPTORS; AC POWER SUPPLY DEVICES AND VIDEO SYSTEMS FOR PRODUCING AND DISPLAYING IMAGES OF CERTAIN ANATOMICAL REGIONS