Energizer Battery, Alkaline, Zinc, Manganese Dioxide, 600 mAh Battery, 9 V Battery, Miniature Snap Terminal, 100 mA Maximum Discharge, 4.8 V Discharge Cut-Off, 5 years Shelf Life, -18 to 55 deg C Operating, Dimensions: 1.909 in L x 1.043 in W x 0.689 in D