The Panasonic CR1220 Lithium Coin Cell is a powerful and dependable power source designed for use in sophisticated small electronic devices. The Lithium Coin CR1220 has a proven track record for appliances where traditional batteries cannot be used. You can use the batteries for digital watches, laser pens, calculators, fitness appliances, car keys and medical devices like a tensiometer and a clinical thermometer. • Features:  Usable in a wide range of temperatures (-30°C to +60°C)  Very high weight-to-power ratio  High leak protection  No mercury added  Good pulse capability  High discharge characteristic  Stable voltage level during discharge  Long-term reliability • Specifications:  Battery Size: CR1220  Battery Chemistry: Lithium Manganese Dioxide (LiMnO2)  Nominal Voltage: 3.0V  Nominal Capacity: 35 mAh  Operating Temperature Range: -22°F to 140°F (-30°C to 60°C)  Shelf Life: 10 Years  Dimensions Height - 0.08" (2.0 mm), Diameter - 0.49" (12.5 mm)  Weight: 0.04 oz. (1.2 g) • Replaces: AWI L04, BR1220, CR1220, DL1220, ECR1220, KCR1220, LM1220, Seiko SB-T13, Timex PA