Energizer Battery, Battery Chemistry: Alkaline, Battery Size: A23, Battery Capacity: 40 mAh, Battery Voltage: 12 VDC, Replacement for: 1181A, A23BP, DL21, DL23, MN-21B, MN21, V23GA, Dimensions: 0.4 in Dia x 1.1 in H, Package Quantity: 1, Package Type: Pack