Maxell CR1220 Battery – Small Size, Steady Power

The Maxell CR1220 battery is a small yet powerful 3V lithium coin cell designed for compact devices that require dependable, long-lasting energy. Measuring just 12mm in diameter and 2.0mm thick, it offers a capacity of approximately 35 mAh, making it ideal for watches, calculators, small sensors, and memory backup systems. Built with Maxell’s advanced lithium manganese dioxide chemistry, the CR1220 delivers stable voltage, excellent leakage resistance, and a long shelf life, ensuring reliable performance in low-drain and intermittent-use electronics.

Understanding the Maxell CR1220 Lithium Coin Cell

The CR1220’s compact dimensions make it one of the smallest coin cells in Maxell’s lineup, yet it provides enough power for essential small electronics. Its lithium manganese dioxide (Li-MnO2) chemistry offers high energy density and a flat discharge curve, keeping voltage steady for most of its lifespan. This allows it to support devices where consistent performance is critical despite the small size.

Core Specifications

• Model: Maxell CR1220
• Voltage: 3 Volts
• Capacity: Approximately 35 mAh
• Chemistry: Lithium Manganese Dioxide (Li-MnO2)
• Diameter: 12 mm
• Height: 2.0 mm
• Weight: Around 0.7 grams
• Operating Temperature: -20°C to +60°C

Why Choose the Maxell CR1220?

The Maxell CR1220 lithium coin cell for small devices combines a tiny footprint with dependable voltage stability. Maxell’s rigorous quality control ensures consistent performance, excellent storage stability, and resistance to leakage, making it a reliable choice for various miniature electronics.

Key Advantages

1. Compact Size: Perfect for ultra-small electronics with limited space.
2. Stable Voltage: Maintains a steady 3V output until near depletion.
3. Long Shelf Life: Retains charge for years when stored properly.
4. Leakage Resistance: Protects devices from potential corrosion or damage.
5. Temperature Resilience: Operates effectively in a wide range of climates.

Common Applications for the Maxell CR1220

Due to its small size and reliable performance, the CR1220 is found in many precision electronics.

1. Watches

The reliable CR1220 battery for watches powers slim timepieces with accuracy and minimal maintenance needs.

2. Calculators

The long-lasting 3V lithium battery for calculators ensures uninterrupted function for both standard and scientific models.

3. Memory Backup Systems

Used to maintain settings and clock functions in small electronic devices and computers.

4. Sensors

Ideal for compact sensors in remote controls, security devices, and measurement tools.

5. Medical Devices

Found in certain small diagnostic tools that require reliable, consistent energy.

Performance and Reliability

The CR1220 is built for steady output over its service life, making it suitable for devices where even small voltage drops can impact performance. Its lithium chemistry allows it to work efficiently in low-drain devices for extended periods.

Voltage Stability

Maintains nominal 3V output across most of its discharge cycle, avoiding sudden performance loss.

Temperature Endurance

Works reliably in environments ranging from -20°C to +60°C, suitable for indoor and outdoor use.

Comparing the CR1220 to Other Coin Cells

The CR1220 offers more capacity than the thinner CR1216 but remains slimmer than the thicker CR1225, making it a balanced choice for space-limited electronics.

Battery Type	Diameter	Thickness	Capacity	Common Uses
CR1216	12 mm	1.6 mm	~25 mAh	Watches, calculators
CR1220	12 mm	2.0 mm	~35 mAh	Watches, calculators, sensors
CR1225	12 mm	2.5 mm	~50 mAh	Watches, medical devices

Proper Storage and Handling

Store CR1220 batteries in a cool, dry location away from sunlight. Keep them in their original packaging until ready for use to prevent short-circuiting or discharge loss.

Replacing a CR1220 Battery

1. Locate the battery compartment on your device.
2. Open it carefully using the proper tool or latch.
3. Note the polarity before removing the old battery.
4. Insert the new Maxell CR1220 with correct orientation.
5. Secure the compartment and test the device.

Environmental Considerations

Recycle used CR1220 batteries at approved collection points. Lithium coin cells should never be disposed of in household waste due to environmental risks.

Conclusion

The Maxell CR1220 is a compact, efficient power solution for small electronics that require steady, long-term energy. Whether it’s powering a slim watch, keeping a calculator running, or supporting a memory backup system, this battery delivers dependable performance backed by Maxell’s trusted quality. With its small form factor, stable voltage, and long shelf life, the CR1220 is a go-to choice for space-constrained electronics that can’t compromise on reliability.