Coin Type Lithium Manganese Dioxide Batteries (CR)
The coin type lithium manganese dioxide battery (CR battery) is a small, lightweight battery with an operating voltage of 3 V and the ability to operate over a wide temperature range.
It has a wide range of applications for powering devices such as various IoT sensors, medical equipment, data loggers and wearable devices.
About Maxell CR Coin batteries
UL Recognised Components
The coin type lithium manganese dioxide battery is a UL recognised component and user replaceable.
Recognised models: CR2032S, CR2032H, CR2032, CR2025, CR2016, CR1632, CR1620, CR1616, CR1220, CR1216
Certification number: MH12568
Applications
- IoT sensors
- Communication tags, beacons
- Wearable devices
- Medical thermometers, activity trackers
- CGM (Continuous Glucose Monitoring)
- DDS (Drug Delivery Systems)
- Keyless entry systems
- FA instruments (Measuring instruments, onboard microcomputers, sensors)
- Stable operating voltage under long-term low load discharge for Memory and RTC backup
- Stable discharge characteristics through low internal resistance and high operating voltage
Employs highly conductive electrolyte, lowering internal resistance and providing stable operating voltage. This allows stable power to be obtained, with little change in operating voltage at high and low temperatures. - Superior leakage resistance and excellent storage characteristics
Employs a leak-resistant organic electrolyte, giving it better leakage resistance than battery types using alkaline electrolytes.
Furthermore, Maxell’s proprietary sealing structure achieves approximately 1% self-discharge rate. - Superior high rate discarge characteristics
Specifications
| Model | CR2032 | CR2032H | Under development CR2032S | CR1216 | CR1220 | CR1616 | CR1620 | CR1632 | CR2016 | CR2025 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Nominal voltage (V) | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | 3 | |
| Nominal capacity (mAh)*1 | 220 | 240 | 250 | 25 | 36 | 55 | 80 | 140 | 90 | 170 | |
| Nominal discharge current (mA) | 0.2 | 0.2 | 0.2 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.2 | |
| Operating temperature range (deg. C)*2 | -20 to +85 | ||||||||||
| Dimensions*3 | Diameter (mm) | 20.0 | 20.0 | 20.0 | 12.5 | 12.5 | 16.0 | 16.0 | 16.0 | 20.0 | 20.0 |
| Height (mm) | 3.2 | 3.2 | 3.2 | 1.6 | 2.0 | 1.6 | 2.0 | 3.2 | 1.6 | 2.5 | |
| Weight (g)*3 | 3.0 | 3.0 | 2.8 | 0.6 | 0.8 | 1.1 | 1.3 | 1.9 | 1.7 | 2.5 | |
| Data sheets |  | | - | | | | | | | | |
| Diagram of with Terminals | - | | - | - | - | - | - | - | - | - | |
| Warnings | | ||||||||||
- Nominal capacity indicates duration until the voltage drops to 2.0 V when discharged at a nominal discharge current at 20 deg. C.
- When using these batteries at temperatures outside the range of 0 to +40 deg. C, please consult Maxell in advance for conditions of use.
- Dimensions and weight are for the battery itself, but may vary depending on the shape of terminals or other factors.
- Data and dimensions are not guaranteed. For further details, please contact your nearest Maxell office.
- Contents on this website are subject to change without notice.
Construction
Principle and Reactions
The coin type lithium manganese dioxide battery uses manganese dioxide (MnO2) as its positive active material, lithium (Li) as its negative active material, and an organic electrolyte.
| Positive reaction : | MnO2+Li++e- → MnOOLi |
|---|---|
| Negative reaction : | Li → Li++e- |
| Total reaction : | MnO2+Li → MnOOLi |
Discharge Current Consumption and Duration Time
Discharge Characteristics after Storage
Discharge Characteristics
Temperature Characteristics
Safety precautions
If misused, this battery may deform, leak (the liquid inside the battery may leak to the outside), generate heat, explode, or ignite.
Since such misuse may cause injury or equipment failure, please be sure to read and observe [Warnings and Cautions].
Glossary of Battery Terms
Direct contact electrically between the positive electrode and negative electrode caused by damage to the separator or gasket, or the presence of a conductor piercing the separators. A battery will become completely exhausted before use.
Surges of current across the terminals of a battery when it is short-circuited.
Enduring characteristics against leakage.
Ratio of usable capacity against theoretical capacity.
Medium in a battery which causes ions to move to create an electrochemical reaction. Either water or non-aqueous solution is used as solvent. The latter is called non-aqueous electrolyte solution, either organic or inorganic.
Electrode materials in a battery which cause an electrochemical reaction to generate electricity.
Ex)
Battery Type / Positive material / Negative material
LR / Manganese Dioxide / Zinc
CR / Manganese Dioxide / Lithium
Expiration of guarantee period of a primary battery determined by each manufacturer conforming to the IEC. Because a secondary battery can be used over again by charging, it is unnecessary to show this.
Note: IEC (International Electrotechnical Commission) is a worldwide organization of standardization comprised of all national electrotechnical committees.
A finished or semi-finished battery is store under specified conditions for a specified period.
Test conducted within 2 weeks after storage.
Store the battery under specified conditions.
Test conducted within 2 months of the production month.
Usable energy of a battery per unit volume or unit weight. The former is called volumetric energy density (Wh/l); the latter gravimetric energy density (Wh/kg).
Capacity (Ah, mAh) is the product of the discharge current (A, mA) and discharge time (h). Note: Because manganese dry batteries and alkaline manganese batteries are often used for heavy-duty applications, the discharge time at a specific load is usually mentioned instead of the capacity.
Time until a battery voltage exceeds the end-point voltage during discharge.
Voltage deviation from equilibrium caused by charge or discharge.
Operation during which a reverse reaction of discharge occurs when electrical energy is received from an external source.
Change of a battery voltage with discharge.
Decreasing capacity during storage without load, caused by chemical reaction in a battery. The higher the temperature during storage, the greater the rate of self discharge.
Continue to discharge after a battery voltage drops below its end-point voltage.
Operation during which a battery delivers current to an external circuit.
Resistant component in a battery that makes discharge reaction slow.
Specified closed circuit voltage at which a service output test is terminated.
External device or method through which a battery is discharged.
Suitable approximate value of voltage used to identify the voltage of a battery.
For example)
Alkaline manganese battery; 1.5V
Lithium manganese dioxide battery; 3.0V
Voltage across the terminals of a battery when it is on discharge. As a battery has an internal resistance, CCV is lower than OCV and CCV becomes lower with a range of current.
Voltage across the terminals of a battery when no external current is flowing.
Source of electrical energy obtained by the direct conversion of chemical energy designed to be charged by any other electrical source. It is also called a storage battery or accumulator.
Source of electrical energy obtained by the direct conversion of chemical energy and not designed to be charged by any other electrical source.
Download Links
Downloads
- Catalog: Coin Type Lithium Manganese Dioxide Batteries (CR)
- Safety Data Sheet: Coin Type Lithium Manganese Dioxide Batteries (CR)
- Update on Dangerous Goods Transportation Regulations for Lithium Cells and Batteries
- Certificate of Conformity for IEC 60086: Coin Type Lithium Manganese Dioxide Batteries (CR)
- MICRO BATTERY Cross Reference and Replacement Guide
