Cylindrical Type Lithium Manganese Dioxide Battery (CR)
Support multi-function loT devices with high capacity technology and long-term reliability
Maxell’s cylindrical type lithium manganese dioxide battery realizes stable discharge characteristics with its original sealing structure, unique configuration to enhance electrical conductivity, and negative electrode material.
This battery’s long-term reliability makes it ideal for use as a power source in industrial applications such as IoT devices and smart meters (e.g. gas, water). Battery packs can also be produced to meet special customer requirements.
Battery packs can also be produced to meet special customer requirements.
Topics
Please note that all information on this webpage including “News release”, “Notice”, technical document or leaflet is subject to change without notice.
About Maxell Cylindrical Type CR batteries
Maxell Cylindrical Type CR (lithium manganese dioxide) batteries are available only for equipment manufacturers as a built-in part. Therefore, Maxell does not supply these batteries for replacement directly to users of equipment with these batteries. When built-in Cylindrical Type CR batteries need to be replaced, please contact your equipment manufacturer. If you are planning to use Maxell Cylindrical Type CR batteries in your equipment as a built-in part, please contact Maxell.
UL Recognized Components
The cylindrical type lithium manganese dioxide battery is a UL (Underwriters Laboratories Inc.) recognized component. (User Replaceable)
Recognized models:CR17450A, CR17335A, CR17450AH, CR17500AU
Certification number: MH12568
Applications
- Smart meters (e.g. gas, water, electricity)
- IoT devices
- Communication devices (e.g. 3G, LTE, LPWA)
- In-vehicle devices
- Security devices
- Memory backup power
- High energy density*1
High energy density has been achieved by optimizing the filling rate of the material by means of a unique electrode structure.
*1 Volumetric energy density of 15% or more compared to typical cylindrical CR batteries (depending on battery size). Surveyed by Maxell as of March 2024. - Long-term reliability lasting more than 10 years*2
The employment of a heat-resistant gasket and a laser-seal structure prevents water intrusion and electrolyte evaporation, ensuring long-term reliability that lasts more than 10 years*2. The self-discharge rate is about 0.5% per year.
*2 Designed lifetime at 20 deg. C when not yet used. Actual lifetime will vary depending on conditions such as discharge current and temperature. - Stable discharge characteristics
The original negative electrode material maintains low internal resistance even at high depths of discharge and ensures stable discharge. - Superior low-temperature characteristics
- High safety due to internal short-circuit prevention structure
Specifications
| Model | CR17335A | CR17450A | CR17450AH | CR17500AU | |
|---|---|---|---|---|---|
 |  |  |  | ||
| Nominal voltage (V) | 3 | 3 | 3 | 3 | |
| Nominal capacity (mAh)*1 | 1650 | 2500 | 3000 | 3500 | |
| Nominal discharge current (mA) | 5 | 5 | 1 | 1 | |
| Operating temperature range (deg. C)*2 | -40 to +85 | ||||
| Dimensions*3 | Diameter (mm) | 17 | 17 | 17 | 17 |
| Height (mm) | 33.5 | 45 | 45 | 50 | |
| Weight (g)*3 | 17 | 22 | 24 | 26 | |
| Data sheets |  | | | | |
| Diagram of with Terminals | | | | - | |
| Warnings | | ||||
| UL Certification number | MH12568 | ||||
- Nominal capacity of CR17500AU indicates duration until the voltage drops to 1.5V when discharged at a nominal discharge current at 20 deg. C.
As for other models, nominal capacity indicates duration until the voltage drops to 2.0V when discharged at a nominal discharge current at 20 deg. C. - When using at temperatures exceeding 60 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 us at your nearest Maxell office.
- Contents on this website are subject to change without notice.
Construction
Principle and Reactions
The cylindrical type lithium manganese dioxide battery uses manganese dioxide (MnO2) as its positive active material and lithium (Li) as its negative active material.
| Positive reaction : | MnO2+Li++e- → MnOOLi |
|---|---|
| Negative reaction : | Li → Li++e- |
| Total reaction : | MnO2+Li → MnOOLi |
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.
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