Energizer SR57 Button Battery, 1.55V, 9.5mm Diameter

The Energizer Low drain watch battery features a zinc/monovalent silver oxide chemical system with a nominal voltage of 1.55 volts and a capacity of 55 mAh, tested under an 18.2 kΩ discharge at 20°C down to 1.2 volts. It operates reliably within a temperature range of 0°C to 60°C and has a low self discharge rate of less than 5% per year at 20°C. Weighing approximately 0.76 grams, this battery offers long lasting and efficient power, ideal for precision timepieces.

Equivalent mercury containing battery range
Long shelf life so they are always ready when you need them
They have been extensively tested so you will never be disappointed