CR1220 Button Cell Battery: Introduction and Equivalents and Precautions

CR1220 Button Cell Battery: Introduction and Equivalents and Precautions
Post Date:2024-07-07,Murata Electronics
CR1220 lithium manganese dioxide battery is designated according to IEC standards. In this nomenclature, "C-" indicates a chemical battery system with lithium metal as the negative electrode and manganese dioxide as the positive electrode. "R-" indicates that the battery is cylindrical; if it is square, "F" is used instead of this designation. "12" indicates a diameter of 12.5 mm, while "20" indicates a height of 2.0 mm.

The battery has a nominal voltage of 3.0V, an end voltage of 2.0V, and a rated capacity of 40mAh, but the capacity may vary from manufacturer to manufacturer.

CR1220 is commonly used in CMOS batteries for digital products and other small electronic devices, and can be used for memory functions, power-off protection modules, electronic dictionaries, LED lighting, sound-generating toys, and various other products.

CR1220 Specifications

Murata CR1220 battery
  • Chemical System: Lithium/Manganese Dioxide (Li/MnO2)

  • Negative Electrode: Lithium Metal

  • Positive Electrode: Manganese Dioxide


  • Diameter: 12.5mm

  • Height: 2.0mm

  • Nominal Voltage: 3.0V

  • Endpoint Voltage: 2.0V

  • Rated Capacity: 40mAh

Note: Rated capacity may vary from manufacturer to manufacturer.

CR1220 Battery Equivalents

CR1220 is a coin cell battery with a diameter of 12mm and a thickness of 2.0mm. It is a lithium manganese dioxide button cell battery commonly used in various electronic devices such as watches, calculators, and small electronics.

If you are looking for an equivalent battery, you can consider other batteries with the same specifications. The first two letters "CR" indicate that it is a lithium battery, and the numbers "1220" represent the size (12mm diameter, 2.0mm thickness).

Common alternatives to CR1220 batteries include:

  • DL1220:

This is a lithium battery with the same specifications as CR1220, with a diameter of 12mm and a thickness of 2.0mm. DL1220 is commonly used in small electronic devices such as watches and calculators, and is an equivalent model of CR1220.

  • Energizer ECR1220:

Energizer is a well-known battery brand, and ECR1220 is equivalent to its CR1220 model. This is a lithium battery suitable for a variety of small electronic devices.

  • BR1220:

BR1220 is also an equivalent model of CR1220, which means it is a lithium battery with the same diameter and thickness. It is usually used with CR1220 compatible devices.

  • LM1220:

LM1220 is another equivalent model of CR1220. Again, it is a lithium battery suitable for a variety of small electronic devices. When choosing a battery, consider the reputation of the brand and supplier.

  • KCR1220:

The KCR1220 is another equivalent model of the CR1220 and is also a lithium battery. This battery can be used in many CR1220 compatible devices.

  • SB-T13:

The SB-T13 is an equivalent name for the CR1220 battery. It is one of the alternative names used by different manufacturers to refer to the same button cell battery. CR1220, DL1220, BR1220, ECR1220 and SB-T13 are all different names for essentially the same 3V lithium button cell battery with a diameter of 12 mm and a thickness of 2.0 mm.

When replacing a battery, it is important to use a battery with the same voltage and similar size to ensure proper operation of the device.

CR1220 Applications

1.Keyless Entry Devices

CR1220 is commonly used in automotive keyless entry systems or other access control systems. It provides a compact and reliable power source for the electronics responsible for the keyless entry function.

2.Glucose Monitors

In glucose monitors or blood glucose testing devices, the CR1220 can be used to power electronic components such as displays and memory, ensuring that the device remains operational and retains data even when not in use.

3.Implantable Defibrillators

It is important to note that implantable medical devices typically use specialized batteries, but the CR1220 may be used in some aspects of telemetry or monitoring systems associated with implantable defibrillators.

4.Heart Rate Monitors

CR1220 batteries are suitable for powering heart rate monitors, ensuring a reliable, long-lasting power source for continuous monitoring of cardiac activity.

5.Artificial Pacemakers

Similar to implantable defibrillators, artificial pacemakers typically use specialized batteries designed for medical implant applications. While the CR1220 may not be the primary choice for a pacemaker, it can be used in ancillary or monitoring systems associated with that device.

6.Toys and Games

CR1220 is commonly used in small electronic toys and games. Its compact size and sufficient power capacity make it ideal for applications where space is limited and a steady power supply is needed for features such as lights, sounds, or memory storage in electronic toys and games.

CR1216 vs. CR1220 vs. CR1225

Battery Model
Size (Diameter x Height)
12.5 mm x 1.6 mm
12.5 mm x 2.0 mm
12.5 mm x 2.5 mm

CR1220 Manufacturers

While Panasonic is a well-known manufacturer of various electronic products, including batteries, it is important to note that CR1220 is a standardized button cell battery designation that is produced by multiple manufacturers to this standard. Therefore, CR1220 batteries are not unique to Panasonic, and you can find similar products from other well-known battery manufacturers.

If you specifically need a Panasonic CR1220 battery, you can look for batteries with prefixes such as ECR1220 or BR1220. These are variations of the CR1220 produced by Panasonic.

Things to note

  • Some battery compartments designed for CR1220 can accommodate CR1216 or CR1225, but caution is recommended to avoid physical damage to the device.
  • The small height difference (0.5 mm) between the CR1220 and CR1225 can be critical for tight tolerance devices and may cause malfunction or damage.
  • The height difference (0.4 mm) between the CR1220 and CR1216 may cause contact problems and unreliable operation in some devices.


Can I replace the ML1220 with a CR1220?

The ML1220 and CR1220 batteries have different characteristics and are not interchangeable. The main differences are their chemistry and functionality.

ML1220: This is a rechargeable lithium-ion button cell. It is rechargeable and is typically used in applications that require rechargeable functionality.

CR1220: This is a non-rechargeable lithium manganese dioxide button cell. It is designed for single use and attempts to recharge it may result in safety hazards such as leakage, overheating, or even explosion.

Is the CR1220 rechargeable?

No, CR1220 batteries are not typically rechargeable. The "CR" designation usually means the battery is a lithium manganese dioxide button cell and is not intended for recharging. Rechargeable lithium button cells often have different designations, such as "ML" (lithium manganese dioxide rechargeable) or "LIR" (lithium ion rechargeable).

Can a CR1220 replace a CR1225?

While the CR1220 and CR1225 batteries look similar and are both 3-volt button cells, they are not the same size.

CR1220: 12 mm diameter, 2.0 mm thickness.

CR1225: 12 mm diameter, 2.5 mm thickness.

While in some cases a CR1220 may fit into a space designed for a CR1225, it is generally not recommended to use a battery that does not meet the specified dimensions for a device. The difference in thickness may affect the electrical contacts and may result in poor contact, poor performance, or even damage to the device.

What is the CR1220 used for

CR1220 lithium button batteries are indeed used in a variety of electronic devices due to their small size and 3V voltage.

Watches: Many watches, especially smaller or thinner ones, use CR1220 batteries to power their quartz movements.

Keyless entry devices: Car key fobs, remote controls, and other devices that use compact power sources may use CR1220 batteries.

Health and medical devices: Blood glucose monitors, heart rate monitors, and other portable medical devices may use CR1220 batteries.

Toys and games: Small electronic toys and games often rely on button batteries (including CR1220) for power.

Calculators: Some small calculators use CR1220 batteries as a power source.

Cameras: Some small cameras, especially those where size and weight are key factors, may use CR1220 batteries.

What is the life expectancy of a CR1220 battery

The life expectancy of a CR1220 battery will vary based on usage patterns, the specific device it is powered, and environmental conditions, among other factors. While the battery can last nearly a year, it is important to note that the actual lifespan may be shorter or longer depending on conditions.

CR1220 batteries are commonly used in a variety of electronic devices, including watches, calculators, key fobs, and more. The discharge rate depends on how often the device is used and the power requirements of the device. Devices that use more power may drain the battery faster.

Additionally, environmental factors such as temperature can affect the performance of lithium batteries. Extreme temperatures, both hot and cold, can affect the overall lifespan of the battery.


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