This battery employs specially treated manganese dioxide for the positive material and a lithium-aluminum compound for the negative material. A specially formulated organic electrolyte is also used, yielding excellent discharge characteristics with low self-discharge.


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 usable temperature range

Demonstrates stable operating voltage in temperatures as low as -20 deg. C and as high as 60 deg. C.

Low self-discharge 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).

Excellent high rate discharge characteristics

Maxell ML (lithium manganese dioxide rechargeable) 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 ML batteries need to be replaced, please contact your equipment manufacturer. If you are planning to use Maxell ML batteries in your equipment as a built-in part, please contact Maxell.

UL Recognized Components

The coin type lithium manganese dioxide rechargeable battery is a UL (Underwriters Laboratories Inc.) recognized component. (Technician Replaceable)

Recognized models: ML2032, ML2016

Certification number: MH12568


  • -Mobile Phones
  • -PHS
  • -OA Machines (Fax, Copiers, Printers)
  • -Notebook PCs
  • -Desktop PCs
  • -PDAs
  • -Camcorders
  • -Digital Still Cameras
  • -Portable CD/MD Players
  • -Watches
  • -Medical Instruments, Cash Registers
  • -FA Instruments (Measuring Instruments, Onboard Microcomputers, Sensors)
  • -Electronic Meters (Water, Gas, Electricity)
Model ML2016 ML2032
Nominal voltage (V) 3 3
Nominal capacity (mAh)*1 25 65
Nominal discharge
current (µA)
200 200
Charge /
Discharge cycle lifetime
Depth of
discharge = 10 %
1500 1000
Depth of
discharge = 20 %
500 300
Operating temperature
ranges (deg. C)
-20 to +60
Dimensions*2 Diameter(mm) 20 20
Height(mm) 1.6 3.2
Weight(g)*2 1.8 3.0
Data sheets pdf pdf
Diagram of with Terminals pdf pdf
Warnings pdf
  • Nominal capacity indicates duration until the voltage drops down 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 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.


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.


Charge Property


Low Self-discharge


Overcharge Characteristics


High Rate Discharge 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] : Primary battery
[Glossary of Battery Terms] : Rechargeable battery (Secondary battery)
[Glossary of Battery Terms] : Open circuit voltage (OCV)
[Glossary of Battery Terms] : Closed circuit voltage (CCV)
[Glossary of Battery Terms] : Nominal voltage
[Glossary of Battery Terms] : Load
[Glossary of Battery Terms] : End-point voltage (End voltage, Cutoff voltage, Final voltage)
[Glossary of Battery Terms] : Internal resistance
[Glossary of Battery Terms] : Discharge
[Glossary of Battery Terms] : Over discharge
[Glossary of Battery Terms] : Self discharge
[Glossary of Battery Terms] : Discharge characteristics (Discharge curve)
[Glossary of Battery Terms] : Charge
[Glossary of Battery Terms] : Polarization
[Glossary of Battery Terms] : Duration time (Duration period)
[Glossary of Battery Terms] : Capacity
[Glossary of Battery Terms] : Energy Density
[Glossary of Battery Terms] : Initial test
[Glossary of Battery Terms] : Storage
[Glossary of Battery Terms] : Test after storage
[Glossary of Battery Terms] : Aging
[Glossary of Battery Terms] : Expiry date
[Glossary of Battery Terms] : Active material
[Glossary of Battery Terms] : Electrolyte
[Glossary of Battery Terms] : Utilization factor
[Glossary of Battery Terms] : Leakage resistance
[Glossary of Battery Terms] : Short circuit current
[Glossary of Battery Terms] : Internal short circuit

Page top