Duracell Coin Battery, Lithium-Manganese Dioxide Chemical System, 3 V DC Nominal, 150 mAh Nominal, 2025 Battery, 3 V DC Discharge Cut-Off, 3.1 to 3.3 V DC Charge, 42 mA Maximum Discharge, Flat Terminal, 10 years Shelf Life, 3500 hr, 0.787 in Dia x 0.098 in H Dimensions