Energizer Non-Rechargeable Coin Battery, Lithium Manganese Dioxide (Li/MnO2) Chemical System, 3 V Nominal, 225 mAh Nominal, 2032 Battery, 2 V Discharge Cut-Off, 0.19 mA Maximum Discharge, Pressure Contact Terminal, 8 years Shelf Life, For Use With: Calculator, Heart-Rate Monitor, Keyless Entry, Glucose Monitor, Watch, Toy and Games, 0.697 in Dia x 0.126 in H Dimensions,