SR44 batteries are silver oxide button cells that deliver precise, long-lasting energy for small but critical devices. With a stable 1.55V output and superior lifespan, SR44 batteries are trusted in watches, cameras, calculators, and medical devices that require accuracy and durability. Often compared to their alkaline equivalent LR44, SR44 cells outperform in reliability and consistency, making them the preferred choice for high-quality instruments. This guide covers everything about SR44 batteries—features, specifications, advantages, usage, comparisons, and FAQs.

What is an SR44 Battery?

The SR44 battery is a silver oxide button cell designed for precision electronics. Unlike alkaline button cells, which lose voltage as they discharge, SR44 batteries maintain a steady 1.55V until near depletion. This makes them especially valuable in devices where accuracy is non-negotiable, such as watches, cameras, and medical instruments.

Specifications of SR44 Batteries

• Battery Type: Silver Oxide Button Cell
• Nominal Voltage: 1.55V
• Capacity: 150–200 mAh (varies by brand)
• Diameter: 11.6 mm
• Height: 5.4 mm
• Weight: Approximately 2 grams
• Common Equivalents: 357, D357, SR44W, SR44SW, AG13 (alkaline equivalent)
• Operating Temperature Range: -10°C to +60°C

These specifications make SR44 batteries a powerhouse in the button-cell world, balancing compact design with high energy density.

Where Are SR44 Batteries Used?

SR44 batteries are chosen for devices where consistency and accuracy are essential. Typical applications include:

• Analog and digital watches
• High-precision cameras
• Calculators
• Laser sights and scopes
• Medical devices such as glucose monitors and thermometers
• LED flashlights and pointers
• Scientific instruments

These devices rely on SR44 because the steady voltage ensures uninterrupted, accurate performance.

SR44 vs LR44 Batteries

Though identical in size, SR44 and LR44 batteries differ in chemistry and performance:

• SR44 (Silver Oxide): Longer-lasting, higher stability, better for precision instruments, slightly higher cost.
• LR44 (Alkaline): Cheaper, widely available, sufficient for toys and basic devices, voltage declines as it drains.

For watches, cameras, and medical tools, SR44 is the better choice. For toys or low-priority gadgets, LR44 can be a budget-friendly option.

Advantages of SR44 Batteries

• Stable 1.55V output until nearly depleted
• Longer lifespan compared to alkaline equivalents
• Leak-resistant construction for sensitive electronics
• Superior performance in temperature variations
• Trusted for accuracy in watches, medical devices, and cameras

Lifespan and Storage

SR44 batteries typically last 1–3 years in active devices, depending on energy demands. Their shelf life ranges between 4 and 6 years, making them a reliable choice for long-term storage. Always store SR44 batteries in a cool, dry environment, away from direct heat and humidity, to maximize their performance life.

Safety Considerations

Like all button cells, SR44 batteries can be hazardous if swallowed. Keep them out of reach of children and pets. Ingestion requires immediate medical attention. Additionally, always recycle depleted SR44 batteries properly to prevent environmental damage.

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Frequently Asked Questions (FAQ)

Conclusion

SR44 batteries stand out as one of the most reliable button cells on the market. With stable voltage, superior lifespan, and leak-resistant design, they are the preferred choice for watches, cameras, and medical instruments where accuracy is non-negotiable. While alkaline LR44 batteries remain a budget alternative, SR44 delivers the kind of consistency and dependability that precision devices demand. For professionals and consumers alike, SR44 batteries remain an essential, trusted power source.