... battery R20Specificationsdry battery, carbon zinc battery,R20 battery Nominal voltage: 1.5V Nominal capacity:1250mAhDry batteryFeatures:R20 carbon zinc battery,dry battery,carbon zinc battery,D battery ... .1)Chemical system: Zinc-Manganese Dioxide (Zinc chloride electrolyte)2)Average weight: 42.5g3)Nominal voltage ... per day, till the voltage down to 0.9V) ...