Energizer Button Battery, 1.55V, 7.9mm Diameter

The Energizer watch battery features a silver oxide (Zn/Ag₂O) chemical system with a nominal voltage of 1.55 volts and a typical capacity of 9.5 mAh, tested at a 100K ohm continuous drain at 21°C. It is lightweight, weighing just 0.24 grams and compact with a volume of 0.06 cubic centimetres. With an impedance ranging from 30 to 40 ohms at 40 Hz, this battery provides efficient, reliable power ideal for small, precision watch applications.

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