SPECIFICATIONS Item Name:Alkaline Battery LR20 D Jacket:Aluminum Foil Chemical system:Zn/MnO2 (NO Hg /Cd/Pd) Nominal Voltage:1.5v Package:Blister or Shrink Dimensions(Diameter*Height*weight)/mm:34±0.5*61±0.5mm*135g Shelf Life:3 years Certification:CE, SGS,UN38.8,CNAS Discharging Time:1800mins