History #

The SR621SW battery is a small silver oxide battery that was first introduced in the 1970s by the Japanese company Sony. It is a single-cell battery that is commonly used in a variety of electronic devices, including watches, calculators, and medical devices.

Typical Chemistry #

The SR621SW battery is a silver oxide battery, which means it contains a silver oxide (Ag2O) cathode and a zinc anode. The electrolyte is a potassium hydroxide solution. Silver oxide batteries are known for their high energy density, which makes them ideal for small devices that require a lot of power.

Typical Use #

The SR621SW battery is most commonly used in watches, calculators, and medical devices. It is also used in some hearing aids, remote controls, and other small electronic devices. The battery is known for its long life and reliable performance.

Design #

The SR621SW battery is a small, cylindrical battery that measures 6.8 mm in diameter and 2.1 mm in height. It has a nominal voltage of 1.55V and a capacity of 28 mAh. The battery is designed to be lightweight and compact, making it ideal for use in small electronic devices. It also has a low self-discharge rate, which means it can hold its charge for a long time.