Makes sure you are stocked up on your energy grab a 4 pack of D cell batteries for you light or lantern.Classification: Alkaline Chemical System: Zinc-Manganese Dioxide (Zn/MnO2 ) Designation: ANSI-13A, IEC-LR20 Nominal Voltage: 1.5 volts Operating Temp: -18AdegC to 55AdegC (0AdegF to 130AdegF) Typical Weight: 139 grams Typical Volume: 56 cubic centimeters Shelf Life: 10 years at 21AdegC Terminal: Flat Contact