Button cell battery Maxell BAT362.MX1 SR721SW 1.55V Silver Oxide single cell

Maxell BAT362.MX1 SR721SW is a single silver oxide button cell with a nominal voltage of 1.55V designed for compact electronic devices. Supplied as an individual replacement cell, it delivers a stable voltage output and consistent performance in low-drain to moderate-drain applications. The chemistry and construction of the cell aim to provide reliable operation over the expected service life while maintaining size compatibility with devices that require SR721SW dimensions.

Advantages

The silver oxide chemistry ensures a steady 1.55V output and a relatively flat discharge curve, which helps maintain device accuracy and predictable run times. As a single-cell supply, it is convenient for quick replacement in watches, calculators, medical instruments and similar small devices. Its compact button form factor offers compatibility with holders designed for SR721SW-sized cells and minimizes space impact.

Suitable for

• Wrist and pocket watches
• Calculators and small electronic timers
• Medical instruments with low to moderate power draw (e.g., hearing aids, glucometers where specified)
• Small sensors and measuring devices

Key specifications

• Chemistry: silver oxide
• Nominal voltage: 1.55 V
• Cell type: button / coin cell
• Form factor: SR721SW-compatible dimensions
• Packaging: single cell

How to use

Observe the device manufacturer’s instructions for cell replacement and polarity orientation. Use appropriate tools or a non-metallic pick to open battery compartments to avoid damage. Insert the cell with the correct polarity marking visible as required by the device, close the compartment securely, and test device operation. Dispose of the depleted cell according to local battery recycling and hazardous waste regulations.

Usage recommendations

Store unused cells in a cool, dry place away from direct sunlight and heat sources. Replace batteries in matched sets when a device requires multiple cells, and avoid mixing new and used cells to prevent leakage or reduced performance.