BPW4-3 3.6V NiCd D W3 D Wide : 3.6V 4000mAhUsage and CompositionEmergency Lighting, Two Way Radios, Memory Backup Systems, Professional lighting, Emergency Medical Equipment Security ServicesNickel Cadmium (NiCd)Battery SpecificationsVoltage 3.6VNominal Capacity 4000mAhPhysical DimensionsSize D X 3 WideWidth 66mmHeight 120mmWeight 375g