Production Specification: Description: LR6 Mercury & Cadmium Free Alkaline Manganese Dry battery 4pcs/card Chemcial system:Alkaline Manganese Dioxide Normal Voltage: 1.5volts Normal Height:49.2-50.5(mm) Diameter:9.5-10.5(mm) Jacket:Foil label or Pvc Packing Normal Weight: 23g