EVEREADYA(R) Super Heavy Duty is the affordable Carbon Zinc solution that provides power for you and your family's basic power needs. EVEREADYA(R) Super Heavy DutyA(R) 9v batteries are an economical choice radios and other devices that are low drain. Since 1896 EVEREADYA(R) batteries have been providing dependable portable power. For every family, everywhere, every day.Specs: Super Heavy Duty Chemical System: Leclanche Zinc-Manganese Dioxide (Zn/MnO 2 )No added mercury or cadmium Designation: ANSI-1604D, IEC-6F22Nominal Voltage: 9.0 volts Operating Temp: -5AdegC to 55AdegC (20AdegF to 130AdegF)Typical Weight: 37.0 grams (1.3 oz.)Typical Volume: 20.3 cubic centimeters (1.2 cubic inches)Metal Jacket:Terminal: Miniature Snap