Button battery. Light and compact, high energy density, excellent shelf life, long-term reliability, and high rate capability over a broad temperature range. Chemical System:Lithium-Manganese Dioxide Nominal Voltage:3 V Nominal Capacity:225 mAh Size:2032 Terminal:Flat Suitable for Use With:Medical Devices, 24L219, 24L220, 24L221 Diameter:20 mm Length:20 mm Height:2 mm Temperature Rating:-20 to 54 deg C Standards:ANSI 5004LC Specified, IEC CR2032 Certified Special Features:3.14 gm Average Weight, 0.63 Cu-cm Volume Usage:For Home Medical Devices, Security Devices, Fitness Devices, Watches, Calculators and Electronics Package Type:Pack Quantity Per Pack:2