3 Volt CR2032 Lithium Coin Battery This CR-2032 lithium battery looks like a coin or a thin button. This is a commonly used battery to keep date and CMOS settings current when power is off in computers. Also used in reflective/lighted vests for power. The IEC “CR” prefix indicates a round, lithium/manganese dioxide cell. Coin-shaped cells are thin compared to their diameter. The metal can is the positive terminal, and the cap is the negative terminal. CR stands for manganese dioxide lithium chemistry. Since LiMnO2 cells produce 3 volts, there are no widely available alternate chemistries for a CR coin battery. Open circuit voltage is 3.6Volts. CR2032 Lithium Button Battery Specifications: Standard Discharge Current: 0.2 mA, 0.03 mA (BR). Size in mm: 20 x 3.2 Maximum discharge current: 3 mA. Maximum pulse discharge current: 15 mA. Typical Capacity: (mAh)220-225 Wide temperature usage range: -20 C ~ +60 C ANSI C18/NEDA designation:5004LC Note: Our CR2032 batteries are high quality from various manufacturers. Do Not substitute these batteries for CR2025 batteries. They are not the same size.