Used commonly to power wrist watches, medical equipment, calculators, gadgets and as a settings, date-time batter backup in motherboards and some other devices. Specifications Battery Type: Lithium Manganese Button Cell Battery Nominal Voltage: 3 Volts Capacity: 55mAh Manufacturer Ref: CR1616 (Maxell) Other Manufacturers Names: Citizen: 280-209 ANSI C18/NEDA designation: / Dimensions: 16.0 × 1.6 mm (Diameter x Height) Packaging: Blister-Carton Pack