Maxell Coin-Type Lithium Manganese Dioxide Rechargeable Battery
Maxell’s coin-type lithium manganese dioxide rechargeable battery is a compact and lightweight power solution designed for reliability and efficiency.
Engineered with specially treated manganese dioxide as the positive material and a lithium-aluminum compound as the negative material, this battery delivers superior performance. Its advanced organic electrolyte formulation ensures excellent discharge characteristics while minimising self-discharge, making it an ideal choice for long-lasting, rechargeable energy.
About Maxell ML batteries
Important Notice Regarding Maxell ML Batteries
Maxell ML (Lithium Manganese Dioxide Rechargeable) batteries are exclusively supplied as built-in components for equipment manufacturers. As a result, Maxell does not provide these batteries directly to end users for replacement. If your device requires a replacement ML battery, please contact the original equipment manufacturer for assistance.
For manufacturers considering the integration of Maxell ML batteries into their products, please contact Maxell Europe directly for further information and support.
UL Recognised Components
The coin type lithium manganese dioxide rechargeable battery is a UL recognized component. (Technician Replaceable)
Recognized models: ML2032, ML2016H
Certification number: MH12568
Applications
RTC/Memory Backup
- Desktop PCs
- Video cameras
- Medical instruments
- Factory Automation instruments
- Communication devides
Main Power Source
- Rechargeable watches (solar watches)
- Combination with energy harvesting (e.g. solar cell)
- Approx. 2.5 V operating voltage.
The operating voltage is about twice that of nickel cadmium rechargeable batteries. Displays a high discharge voltage of 2.8 V when at 10% of nominal capacity (depth of discharge is 10% or less), when charged at 3.0 to 3.3 V. - Superior charge/discharge characteristics
Achieves 1,000 cycles of discharging to 10% of nominal capacity (Depth of discharge = 10%). The total discharge capacity is quite high at 100 times nominal capacity. (shipped fully charged) - Wide -20 deg. C to 60 deg. C operating temperature range
Demonstrates stable operating voltage in temperatures as low as -20 deg. C and as high as 60 deg. C. - Low self-discharge rate and superior leakage resistance
Self-discharge at 20 deg. C is no more than 2% per year. Supplies a nominal capacity of about 95% even when stored at 20 deg. C for roughly five years (according to accelerated test conducted by Maxell). And since organic electrolyte is used, the battery has superior leakage resistance. - Excellent floating characteristics
A specially formulated organic electrolyte is employed to provide stable discharge characteristics even if charged for a year at 3.3 V at 20 deg. C (according to accelerated test conducted by Maxell)
Specifications
| Model | ML2016H | ML2032 | |
|---|---|---|---|
| Nominal voltage (V) | 3 | 3 | |
| Nominal capacity (mAh)*1 | 30 | 65 | |
| Nominal discharge current (µA) | 200 | 200 | |
| Charge/Discharge cycle lifetime | Depth of discharge = 10% | 1500 | 1000 |
| Depth of discharge = 100% | 40 | 30 | |
| Operating temperature range (deg. C) | -20 to +60 | ||
| Dimensions*2 | Diameter (mm) | 20 | 20 |
| Height (mm) | 1.6 | 3.2 | |
| Weight (g)*2 | 1.7 | 3.0 | |
| 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.
- Dimensions and weight are for the battery itself, but may vary depending on terminal specifications and other factors.
- Data and dimensions are not guaranteed. For further details, please contact Maxell Europe.
- Contents on this website are subject to change without notice.
Construction
Principle and Reactions
The coin type lithium manganese dioxide rechargeable battery is a 3 V battery using specially treated manganese dioxide for the positive mateiral, a lithium-aluminum compound for the negative material and a specially formulated organic electrolyte.
Discharge Characteristics
Charge/Discharge Cycle Performance
Temperature Characteristics
Storage 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 standardisation 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
Composition/component information, storage, and disposal methods, etc.
EU Declaration of Conformity, Declaration of Conformity for EU Battery Regulation (REGULATION (EU) 2023/1542 Article 6)
Declaration of Conformity for EU Battery Directive, Declaration of Conformity for RoHS Directive, etc.
Summary of test results for lithium batteries during transportation
Certification Status of ISO 9001, IATF 16949, ISO 14001, ISO 45001
Downloads
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