CR1220 Battery Equivalent & Cross Reference Chart

The CR1220 lithium manganese dioxide battery adheres rigorously to IEC standards, marking it as a dependable choice for various applications. This battery is notable for its coded naming system, where 'C' indicates a battery system with lithium as the negative electrode and manganese dioxide as the positive electrode. Conversely, 'R' signifies its cylindrical form. The numbers '12' and '20' specify its dimensions: 12.5mm in diameter and 2.0mm in height. Given these specifications, one might ask: How does such a compact design impact its efficiency in small, portable devices? It turns out, the narrow dimensions make it especially ideal for devices that prioritize space conservation.

Catalog

Exploring into its electrical characteristics, the CR1220 delivers a nominal voltage of 3.0V with an endpoint voltage of 2.0V. The rated capacity is 40mAh, though this value can vary by manufacturer. This inherent variability raises another interesting question: How does the fluctuation in capacity affect the long-term reliability of the devices using these batteries? Despite these variations, the CR1220 generally ensures a level of performance consistency that manufacturers find reliable. Its broad application underlines its versatility and the crucial need for small yet powerful energy sources in modern electronics.

CR1220 Specifications

The CR1220 battery uses a sophisticated lithium/manganese dioxide (Li/MnO2) chemical system, employing lithium metal as the negative electrode and manganese dioxide as the positive electrode. With precise measurements of 12.5mm in diameter and 2.0mm in height, it offers a nominal voltage of 3.0V and an endpoint voltage of 2.0V. Though its rated capacity is 40mAh, this can fluctuate among manufacturers, being affected by factors like production methods and the materials used.

Chemical Composition and Functionality

The lithium/manganese dioxide system is crucial in determining the battery's performance. How does lithium, a highly reactive metal, ensure a high energy density in such applications? Lithium offers a high energy density, while manganese dioxide provides stability and long shelf life. This configuration is favored for its reliable output and safety profile. Can a different chemical system surpass this balance of energy density and stability?

Physical Dimensions and Design

The CR1220’s compact size, characterized by its 12.5mm diameter and 2.0mm height, is essential for its use in small electronic devices. Why does this small form factor matter so much in modern electronics? This small size facilitates integration into limited spaces and aligns with the trend towards miniaturization in modern electronics.

Voltage Characteristics

A nominal voltage of 3.0V, which is standard among lithium coin cell batteries, provides a stable energy source. The endpoint voltage of 2.0V signals when the battery's efficiency begins to drop. Does monitoring voltage regularly enhance device performance? Regularly checking the voltage helps maintain the optimal performance of the devices it powers. The inherent balance between functionality and longevity prompts deeper considerations in device design.

Capacity Variations

Although the CR1220 is rated at 40mAh, the actual capacity can vary. Factors such as production techniques and quality control amongst manufacturers play a significant role. Could selecting a reputable brand ensure performance consistency? Real-world experiences with different devices, like remote controls or medical equipment, illustrate this variability. This underscores the need for thoughtful selection, especially for critical applications.

CR1220 Battery Equivalents

The CR1220 is a 12mm diameter, 2.0mm thick lithium manganese dioxide coin cell, frequently used in compact electronics, including watches, calculators, and small medical devices. Among its equivalents are: DL1220, Energizer ECR1220, BR1220, LM1220, KCR1220, SB-T13.

Dimensions and Voltage Specificity

What makes these equivalents so reliable? The secret lies in their uniform dimensions and voltage output. With a consistent size of 12mm in diameter and 2.0mm in thickness, alongside a steady 3V voltage, these batteries can be seamlessly interchanged. This compatibility allows devices to function without requiring design alterations or experiencing operational hiccups.

Practical Applications and Reliability

The practical applications of these batteries highlight their reliability and versatility. For precision-dependent medical devices, consistency in battery performance is crucial. This consistency supports precision in instruments like medical thermometers, where accuracy is vital for health outcomes. Moreover, daily-use devices such as watches and calculators benefit significantly from these equivalent batteries. They ensure that timekeeping and calculations remain accurate, thereby supporting daily routines smoothly.

CR1220 Battery Cross Reference Guide

Battery	Nominal Voltage	Cut-Off Voltage	Nominal Capacity	Operating Temperature	Self-Discharge Rate	Standard Discharge Current	Other
Energizer CR1220	3.0 Volts	2.0 Volts	37 mAh	-30°C to +70°C	~1% per year	2.8 mA @ 2.8V (1k2 sec Pulse)
Maxell CR1220	3.0 Volts	2.0 Volts	36 mAh	-20°C to +85°C		0.1 mA
Panasonic BR1220	3.0 Volts	~2.25 Volts	35 mAh	-30°C to +85°C		0.03 mA
Panasonic CR1220	3.0 Volts	2.0 Volts	35 mAh	-30°C to +85°C		0.095 mA
Renata CR1220	3.0 Volts	2.0 Volts	35 mAh	-30°C to +70°C	~1% per year	0.1 mA (Max Continuous)
Varta CR1220	3.0 Volts	2.0 Volts	35 mAh	-20°C to +70°C		1.0 mA

CR1220 Applications

Keyless Entry Systems

The CR1220 is integral to keyless entry systems, providing dependable power for electronic access controls. It ensures the efficient performance of both vehicle and building access systems, enhancing user convenience and security. How does the reliability of the CR1220 ensure minimal disruptions in keyless entry systems? By delivering stable power, the battery significantly contributes to the longevity and reliability of these systems, ensuring users experience minimal issues.

Medical Devices

• Glucose Monitors

In glucose monitors, the CR1220 powers essential electronic components. The precision required for accurate glucose level monitoring is paramount for effective diabetes management. Can a reliable power source like the CR1220 sustain continuous operation? Absolutely, it can, thereby enhancing the quality of life for users.

• Defibrillators

While not typical for implantable devices, the CR1220 can support telemetry in defibrillators. Telemetry is crucial for monitoring cardiac events and device performance externally. The continuous operation of these functions, powered reliably by the CR1220, contributes to patient safety and the efficacy of medical decisions.

• Heart-rate Monitors

The CR1220 provides dependable power for consistent heart-rate tracking, which is essential for both fitness purposes and clinical diagnostics. Why is accurate heart-rate tracking so vital? It ensures precise readings that aid in fitness training and the monitoring of cardiac health over time.

Pacemakers

Though not the primary choice for pacemakers, the CR1220 can be used in auxiliary systems within these critical devices. This supportive role enhances the functionality of the pacemaker, potentially allowing for additional features such as data logging and remote monitoring capabilities.

Small Electronic Toys and Games

For small electronic toys and games, the CR1220 offers compact and stable power. Its size and consistent output make it ideal for powering miniature electronic components.

CR1220 Battery Producers

Have you ever wondered why the CR1220 coin cell has multiple labels like ECR1220 or BR1220? It's not just Panasonic behind these batteries; this type is crafted according to industry standards by numerous reputable manufacturers. While Panasonic remains a key player, several other trustworthy brands also produce batteries that align or even surpass the CR1220 specifications. What implications does this standardization hold for consumers? Primarily, it ensures a diverse and competitive market, allowing for choices based on availability, cost, and individual preference.

Renowned manufacturers like Sony, Energizer, and Duracell also contribute to the production of CR1220 batteries. What sets these companies apart? They are known for their substantial investments in quality control and rigorous testing protocols, ensuring that their batteries not only meet but often exceed reliability and performance benchmarks. In practical terms, you may find that different brands offer batteries performing equally well in voltage output and lifespan, a testament to the industry-wide standardization efforts.

User Insights on Practical Applications

What experiences do users report when utilizing CR1220 batteries from various manufacturers in everyday devices such as watches, calculators, and small electronics? Surprisingly, many users observe negligible performance differences, making the variety of reliable options a notable benefit. For frequent travelers, having access to multiple dependable brands can be particularly advantageous, enabling easy replacements in different regions where certain brands may dominate the market.

CR1216 vs CR1220 vs CR1225

Characteristic	CR1216	CR1220	CR1225
Physical Dimensions (mm)	12.5 x 1.6	12.5 x 2.0	12.5 x 2.5
Capacity (Approx. mAh)	~25	35-40	~50
Drain Currents	Similar to CR1220	Somewhat Lower than CR1225	Somewhat Higher than CR1220
Compatibility	May Fit in CR1220 Slots	Standard Size	May Fit in CR1225 Slots
Device Considerations	Small devices with strict size constraints	General-purpose devices	Devices with slightly larger battery compartments

Additional Notes:

Battery compartments designed for CR1220 might, on occasion, fit CR1216 or CR1225 batteries. Why is this adaptability significant? By accommodating different batteries, it offers users flexibility; however, this flexibility comes with challenges. The slight height differences—0.5mm between CR1220 and CR1225, and 0.4mm between CR1220 and CR1216—appear minimal but can substantially impact the device.

These height discrepancies could create improper contact points within the battery compartment. How does this impact device functionality? Inconsistent contact may lead to device malfunctions or fluctuating performance. An example of this would be a sudden drop in power during critical usage or erratic device behavior, which underscores the dilemma of seemingly minor dimensional changes.

Frequently Ask Quesions (FAQ)

1. Can I replace ML1220 with CR1220?

No, you can't replace an ML1220 with a CR1220. The ML1220 is a rechargeable lithium-ion coin cell, whereas the CR1220 is a non-rechargeable lithium manganese dioxide battery. Recharging a CR1220 could lead to hazardous outcomes such as leakage, overheating, or even explosions. Safety reports have documented such incidents, underscoring why selecting the correct battery type for each device is crucial.

2. Is CR1220 rechargeable?

The CR1220 is typically not rechargeable. Batteries marked 'CR' are designed for single-use applications due to their lithium manganese dioxide composition. Rechargeable lithium coin cells are generally indicated by "ML" or "LIR". Making this distinction is essential, as recharging non-rechargeable batteries can compromise safety and efficiency, leading to operational hazards.

3. Can CR1220 replace CR1225?

No, the CR1220 (12mm diameter, 2.0mm thickness) and CR1225 (12mm diameter, 2.5mm thickness) have different sizes. Using an improperly sized battery can result in poor contact, diminished performance, or even damage to the device. Precision in the physical dimensions of the battery is crucial to ensuring optimal functionality and longevity of electronics. Historical performance data from various applications reveal that mismatches in battery dimensions can significantly degrade device performance.

4. What is CR1220 used for?

The CR1220 is used in various devices owing to its compact size and 3V voltage output. It is commonly found in:

• Watches

• Keyless entry devices

• Health monitors

• Toys

• Calculators

• Small cameras

Its utility in diverse applications attests to its reliability and energy density, making it an integral component in the design of compact electronic devices. The progression towards more portable and energy-efficient electronics has cemented the CR1220's role in many innovative designs.

5. What is the life expectancy of a CR1220 battery?

The CR1220 battery’s life expectancy varies based on usage, device power requirements, and environmental factors. While it typically lasts up to a year, actual longevity depends on the power consumption of the device and the frequency of use. For example:

• A low-power device like a wristwatch may see significantly longer battery life.

• A keyless entry fob activated more frequently may see shorter battery life.

Practical experiences and empirical evidence support this variability in lifespan, highlighting the importance of considering specific applications and usage conditions when evaluating battery longevity.