Energizer Button Battery, 1.55V, 7.9mm Diameter

The Energizer watch battery utilizes a silver oxide (Zn/Ag₂O) chemical system, delivering a nominal voltage of 1.55 volts and a typical capacity of 39 mAh measured at a 22K ohm continuous drain at 21°C. It is lightweight, weighing approximately 0.58 grams and compact with a volume of 0.15 cubic centimetres. The battery’s impedance ranges from 55 to 65 ohms at 40 Hz, making it an efficient and reliable power source for precise, long lasting performance in various watch models.

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