The CR1220 battery is a tiny but powerful lithium button cell commonly used in various everyday devices. This guide explores the CR1220 battery, delving into its specifications, applications, interchangeable options, and comparisons with similar batteries.

Introduction to CR1220 Battery

CR1220 is a type of coin cell or button cell battery commonly used in small electronic devices such as calculators, watches, remote controls, and various other gadgets. It belongs to the CR series of lithium batteries, which are known for their long shelf life, high energy density, and stable voltage output.

The CR1220 battery is a round, flat, coin-shaped battery with a diameter of 12mm and a thickness of 2.0mm, hence the name "CR1220." It is a lithium manganese dioxide (Li-MnO2) battery. This chemistry offers a relatively high energy density and a long shelf life compared to other types of batteries.

The nominal voltage of a CR1220 battery is typically 3 volts. This voltage remains relatively constant throughout the discharge cycle, providing a stable power source for devices.

The capacity of a CR1220 battery usually ranges from around 30 to 40 milliampere-hours (mAh), although this can vary slightly between manufacturers. This capacity determines how long the battery can power a device before needing replacement.

CR1220 Specifications

CR1220 Applications

CR1220 batteries are small, lithium manganese dioxide coin batteries commonly used in various low-power devices that require a long battery life.

Keyless entry devices: Car key fobs, garage door openers

Medical devices: Glucose monitors, hearing aids, heart rate monitors

Small electronics: Calculators, cameras, thermometers, laser pointers

Electronic toys: Some remote controls, small talking toys

They are  not rechargeable and should be disposed of properly at designated battery recycling locations after they are used up.

CR1220 Battery Equivalent

The CR1220 battery is a type of lithium coin cell battery that is commonly used in small electronic devices such as watches, calculators, key fobs, and laser pointers. It has a nominal voltage of 3 volts and a diameter of 12.0 millimeters and thickness of 2.0 millimeters.

• DL1220

• ECR1220

• BR1220

• KCR1220

• LM1220

• 5012LC

• SB-T13

• L04

When choosing a replacement battery, it is important to make sure that the new battery has the same voltage and dimensions as the original battery. You should also check the polarity of the battery (positive and negative terminals) to make sure that it is the same as the original battery.

CR1220 Cross Reference Chart

The table provides specifications for various CR1220 batteries manufactured by different companies. 

Duracell's CR1220 boasts a nominal capacity of 38mAh over a resistance of 45kΩ, with an operational temperature range spanning from -20°C to +60°C. 

Energizer's CR1220 offers a similar nominal capacity of 37mAh but extends its operating temperature range to -30°C to +70°C. Notably, it has a self-discharge rate of approximately 1% per year and supports a discharge current of 0.046mA as standard continuous, with a peak of 2.8mA for a 2s pulse at 2.8V. 

Unfortunately, GP CR1220's specifications are not available in the provided table. 

Maxell's CR1220 provides a slightly lower nominal capacity of 36mAh but operates over a wider temperature range from -20°C to +85°C, with a standard continuous discharge current of 0.1mA. 

Panasonic's CR1220 variants also offer a nominal capacity of 35mAh, with the standard continuous discharge current ranging from 0.03mA to 0.095mA, and operating temperatures spanning from -30°C to +85°C. 

Renata's CR1220 maintains the same nominal capacity and temperature range as Panasonic's, with a similar self-discharge rate of approximately 1% per year and a standard continuous discharge current of 0.1mA, reaching a maximum of 1.0mA. 

Varta's CR1220, lastly, provides a nominal capacity of 35mAh over a resistance of 39kΩ, with an operating temperature range of -20°C to +70°C. However, details regarding its self-discharge rate and discharge current are not provided in the table.

CR1220 vs BR1220 Batteries

CR1220 and BR1220 batteries are commonly used button/coin cell batteries with dimensions of 12.5 x 2.0 mm (~0.4921 x 0.07874 inches).

While CR1220 and BR1220 are popular labels, other variants include ECR1220, DL1220, VR1220, and 5012LC, among others.

• Chemistry and Discharge

CR1220 and BR1220 batteries may differ in chemistry, affecting their discharge characteristics.

CR1220: Negative electrodes made of lithium, positive electrode of manganese dioxide or carbon monofluoride. Nominal voltage: 3.0 V, cutoff voltage: 2.0 V.

BR1220: Similar specs, with more stable output voltage, typically 2.8 volts.

• Performance

CR1220: Capacity of ~35-40 mAh, standard discharge current of ~0.05 - 0.1 mA, max continuous discharge current of 1 mA. Shelf life: 4-7 years.

BR1220: Capacity ~35 mAh, lower standard discharge current (~0.03 mA), longer shelf life (10+ years).

• Interchangeability

Both batteries can be used interchangeably for low-discharge applications. CR1220 suits high-drain applications, while BR1220 performs better in extreme temperatures.

CR1216 Batteries vs CR1220 Batteries vs CR1225 Batteries

CR1216, CR1220, and CR1225 batteries are similar in function but differ in size, impacting their features and performance:

CR1216 Batteries: Sized at 12.5 x 1.6 mm, these have the smallest capacity (approximately 25 mAh) and drain currents similar to CR1220 batteries.

CR1220 Batteries: Measuring 12.5 x 2.0 mm, they offer a smaller capacity (35-40 mAh) and slightly lower drain currents compared to CR1225 batteries.

CR1225 Batteries: With dimensions of 12.5 x 2.5 mm, they provide a larger capacity (around 50 mAh) and somewhat stronger discharge currents than CR1220 batteries.

Some devices designed for CR1220 batteries may accommodate larger CR1225 batteries or smaller CR1216 batteries, but caution is advised to prevent physical damage to the device.

For instance, slight differences in height, such as the 0.5 mm variance between CR1220 and CR1225 batteries, can cause issues like warping in credit card-sized devices. Additionally, a 0.4 mm difference between CR1220 and CR1216 batteries might lead to contact problems and unreliable operation.

In summary, it's crucial not to substitute CR1220 batteries with similarly sized button cells.

Is 1216 and 1220 Battery Equivalent

No, CR1216 and CR1220 batteries are not exact equivalents, although they are very similar and  may work in some devices. If you can, it's always best to use the exact battery type (CR1220) recommended for your device. However, in a pinch, a CR1216 might work as long as it makes good contact and fits in the space provided. Just be aware that it might not last as long.

• Size

CR1220 is thicker (2.0mm) than CR1216 (1.6mm). This difference in thickness might cause fit problems in some devices designed for CR1220.

Their diameter (12.0mm) is the same.

• Capacity

CR1220 typically has a higher capacity than CR1216 due to its larger size. This means CR1220 might last longer in your device.

• Voltage

Both have a nominal voltage of 3 volts.

Can I replace ML1220 with CR1220?

No, you cannot replace ML1220 with CR1220. ML1220 and CR1220 are different types of batteries with different chemistries.

ML1220: Rechargeable lithium-ion battery

CR1220: Non-rechargeable lithium manganese dioxide battery

While they have the same size (12.5mm x 2.0mm), a CR1220 cannot be recharged and may even be damaged if your device tries to charge it.  Using a CR1220 in place of an ML1220 could also potentially damage your device.

How to Clean Leaked CR1220 Battery

Cleaning leaked lithium manganese battery residue requires careful handling due to potential hazards. Here's a safe method to clean it up:

Precautions

• Safety Gear

Wear protective equipment like gloves and safety goggles in a well-ventilated area.

• Battery Removal

Gently remove the battery from the device, ensuring the device is turned off.

• Proper Disposal

Do not dispose of the battery in regular trash. Take it to a designated recycling center or check with local stores that collect old batteries.

• Cleaning Process

Neutralize the Leakage: Use a mild acid like white vinegar or lemon juice on a cotton swab to neutralize the leakage.

Clean Residue: Gently wipe away the residue with a damp cloth, taking care not to damage the device.

Dry Thoroughly: Allow the device to dry completely before reinserting a new battery.

Check for Damage: Inspect the battery compartment and contacts for any damage before replacing the battery.

Prevention Tips

• Use correct battery types.

• Avoid mixing old and new batteries.

• Remove batteries from unused devices.

• Purchase batteries from reputable brands.

• By following these steps and precautions, you can safely manage leaked CR1220 batteries and prevent future incidents.

Final Words

The CR1220 battery serves as a reliable and versatile power source for numerous low-power electronic devices. Understanding its specifications, interchangeable options, and similar battery types equips you to make informed decisions when replacing batteries in your everyday gadgets. Remember to prioritize safety when handling leaked batteries and dispose of them responsibly at designated recycling centers.

Read More:

CR2016 vs. CR2032: Is CR2016 Interchangeable with CR2032

LR44 Battery Equivalent Chart

Button Battery LR44 vs 357