1. Introduction

The LR41 battery is a compact, alkaline button cell widely used in small electronic devices. Known for its reliability and affordability, it powers gadgets requiring minimal space and moderate energy. This guide explores its composition, applications, and best practices for use.

2. Chemical Composition
The LR41 is an alkaline battery, utilizing manganese dioxide (MnO?) as the cathode and zinc (Zn) as the anode, with an alkaline electrolyte (potassium hydroxide). It delivers a nominal voltage of 1.5V, distinguishing it from silver-oxide counterparts (e.g., SR41, 1.55V). While both types are interchangeable in some devices, voltage-sensitive electronics may require careful selection.

3. Physical Specifications

• Dimensions: 7.9mm diameter × 3.6mm height.

• Weight: ~0.6 grams.

• IEC Designation: AG3, LR736 (alkaline); SR41 (silver-oxide).

• Common Aliases: 392, 384, G3, V3GA.

4. Applications
LR41 batteries are ideal for low-drain devices:

• Wearables: Watches, fitness trackers.

• Medical Devices: Thermometers, glucometers.

• Electronics: Calculators, laser pointers, key fobs.

• Toys and Tools: LED lights, mini flashlights, digital calipers.

5. Technical Specifications

• Voltage: 1.5V (nominal).

• Capacity: 25–32mAh (varies by brand and load).

• Operating Temperature: -10°C to 55°C.

• Shelf Life: ~2–3 years when stored in cool, dry conditions.

6. Equivalents and Replacements

• Direct Replacements: SR41 (silver-oxide), 392, AG3.

• Interchangeability Notes:

• Silver-oxide (SR41) offers higher capacity (40–45mAh) and stable voltage but costs more.

• Verify device compatibility, as voltage differences (1.5V vs. 1.55V) may affect performance.

7. Performance and Lifespan

• Low-Drain Devices: Months to years (e.g., watches).

• High-Drain Devices: Days to weeks (e.g., LED lights).

• Factors Affecting Lifespan:

• Temperature: Extreme cold/heat reduces efficiency.

• Load: Continuous high drain shortens life.

• Storage: Cool, dry environments preserve charge.

8. Safety and Handling

• Installation: Ensure correct polarity (+/- alignment).

• Avoid Risks: Do not recharge, disassemble, or expose to fire.

• Child Safety: Keep away from children; ingestion risks severe injury.

9. Environmental Considerations

• Disposal: Classified as non-hazardous in many regions but recycle via dedicated programs.

• Recycling: Utilize retail drop-off points or municipal e-waste facilities.

10. Purchasing Tips

• Brands: Energizer, Duracell, Panasonic, and Sony offer reliable options.

• Check Expiry: Ensure freshness for optimal performance.

• Avoid Counterfeits: Purchase from reputable sellers.

11. Troubleshooting

• Device Failure: Check for expired batteries, incorrect installation, or contact corrosion (clean with alcohol if needed).

• Compatibility Issues: Confirm voltage requirements if substituting with SR41.

12. Conclusion
The LR41 battery is a versatile power source for compact electronics, balancing cost and performance. Understanding its specifications and proper handling ensures longevity and safety. Whether for medical devices or everyday gadgets, the LR41 remains a staple in portable energy solutions.

Comparison Table: LR41 vs. SR41

By selecting the appropriate battery and adhering to usage guidelines, users can maximize device efficiency and safety.