Energizer Button Battery, 1.55V, 6.8mm 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 15 mAh, tested under a 94K ohm continuous drain at 21°C. It is lightweight at 0.28 grams and compact with a volume of 0.07 cubic centimetres. With an impedance of 30 to 40 ohms at 40 Hz, this battery delivers efficient and reliable power, ideal for small, 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