Everything You Need to Know: Specifications & Applications of CR927 3V Coin Battery

CR927 is a widely used non-rechargeable lithium manganese dioxide coin battery, delivering a standard 3.0V output. Thanks to its tiny dimension, stable performance and long shelf life, it has become a preferred power source for a large number of compact low-power electronics. This article elaborates on its key parameters, core performance, typical applications and practical use tips to help you fully understand this common miniature battery.

Basic Technical Parameters

Following international IEC standards, the naming of CR927 directly reflects its physical size: 9.5 mm in diameter and 2.7 mm in thickness. Below are its core specifications:

• Rated Voltage: 3.0 V

• Nominal Capacity: Approximately 30 mAh

• Cell Type: Primary lithium manganese dioxide (non-rechargeable)

• Operating Temperature Range: -20 °C to +60 °C

• Shelf Life: Up to 10 years under normal storage conditions

• Self-discharge Rate: Less than 2% per year

Different from rechargeable batteries, CR927 is a primary cell. Once exhausted, it cannot be recharged and must be replaced. Its low self-discharge rate enables long-term standby, which is one of its most prominent advantages.

Key Performance Features

1. Stable Voltage Output

   Lithium manganese dioxide chemistry ensures CR927 maintains a steady 3.0V voltage during discharge. There is no obvious voltage drop, so it can continuously supply reliable power for precision circuits and avoid abnormal operation of devices caused by voltage fluctuation.

2. Ultra-compact & Slim Structure

   With a thickness of only 2.7 mm, this ultra-thin design fits perfectly into ultra-slim electronic products where regular coin batteries cannot be installed. It effectively saves internal space of devices and supports miniaturized product design.

3. Strong Temperature Resistance

   It works reliably in both low and moderate high temperature environments. Whether used indoors or in mild outdoor conditions, its performance will not be greatly affected, meeting the requirements of diversified usage scenarios.

4. Long-term Storage Capability

   With extremely low self-discharge, the battery retains most of its capacity after years of storage. It is ideal for devices that are used occasionally or require long-time standby power.

Main Application Scenarios

Limited by its small capacity, CR927 is designed for low-current and long-standby equipment rather than high-power devices. Its common applications are as follows:

• Wearable Electronics: Mini smart glasses, sports sensors, portable pedometers and other slim wearable gadgets.

• Time & Measuring Devices: Precision electronic watch movements, electronic thermometers, digital hygrometers and small measuring instruments.

• Remote Controls & Portable Gadgets: Laser pointers, dedicated mini remote controls and small wireless transmitters.

• Industrial & Automotive Accessories: Mini sensors, on-board electronic tags, equipment memory backup power and small indicator lights.

• Daily Outdoor Supplies: Mini warning lights, bicycle speedometers and other portable outdoor small devices.

Selection & Usage Notes

Model Compatibility

CR927 has a unique size of 9.5 mm × 2.7 mm. It cannot be replaced with other mainstream coin batteries such as CR2032, CR2025 or CR1220, as mismatched sizes will lead to installation failure. Besides, please distinguish 3V CR series lithium batteries from 1.5V LR series alkaline batteries. The two types differ greatly in voltage and chemical composition and are not interchangeable. Using the wrong battery will damage electronic circuits.

Safety Guidelines

• Never attempt to recharge CR927. Forced charging may cause bulging, leakage or even safety accidents.

• Keep the battery away from metal objects to prevent short circuit between positive and negative poles.

• Store batteries in dry, cool and ventilated places, and avoid direct sunlight and humid environment.

• Keep the product out of reach of young children to prevent accidental swallowing.

• Dispose of waste batteries through professional recycling channels instead of random dumping.

Conclusion

CR927 3V coin battery combines small size, stable performance and long service life, occupying an important position in the field of miniature low-power electronic equipment. Understanding its parameters and applicable scenarios helps you select and use the battery correctly, extend the service life of devices and eliminate potential safety risks. For all ultra-slim compact electronics that need long-term standby power, CR927 is a cost-effective and dependable choice.