: Silver Oxide Low Drain Button Cell Nominal Voltage : 1.55 Volts Dimensions Application : Ø5.80 X 1.65mm : Analog watch R0.90±0.25 Average Weight : 0.19g Storage loss at 23°C : Less than 5% in 1 year. Storage loss at 60°C : Less than 5% in 20 days. Initial Service Life : 500 hrs (15kΩ) (at.