Button cell battery MAXELL 303 (SR44SW) 1.55V silver-oxide — single piece

MAXELL 303 (SR44SW) is a silver-oxide button cell battery with a nominal voltage of 1.55V supplied as a single piece. It is designed to deliver stable low-current power and steady voltage output for precision and compact devices. The chemistry and construction prioritize voltage maintenance under light continuous loads typical of watches, calculators, medical devices and small instruments.

Advantages

This MAXELL 303 battery provides consistent voltage throughout its service life and exhibits good shelf stability, making it suitable for devices that require precise timing and reliable low-current supply. As a silver-oxide cell, it typically offers better voltage stability and longer useful life under light loads compared with standard alkaline button cells. The single-piece packaging allows simple, direct replacement without additional handling.

Suitable for

• Wristwatches and timing devices
• Calculators and small electronic displays
• Medical devices with low current consumption (e.g., glucose meters, hearing aids with compatible size)
• Portable measuring instruments and test equipment

Key specifications

• Chemistry: silver-oxide
• Nominal voltage: 1.55 V
• Form factor: button cell (coin cell), single unit
• Typical application: low-current precision devices
• Packaging: single battery

How to use

Replace the exhausted battery with the MAXELL 303 following the device manufacturer’s instructions. Ensure correct polarity when inserting the cell; the positive side is typically marked. Handle the battery with dry hands and avoid short-circuiting terminals. Dispose of the used battery according to local regulations for battery recycling or hazardous waste; do not incinerate.

Usage recommendations

Store spare batteries in a cool, dry place away from direct sunlight and heat sources. Keep batteries out of reach of children and pets. If a device will not be used for an extended period, remove the battery to prevent leakage or corrosion.