Maxell CR Series Coin Type Lithium Manganese Dioxide Battery

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.


The coin type lithium manganese dioxide battery (CR battery) is a small, lightweight battery with an operating voltage of 3V 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.

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.

Battery Reactions
Positive reaction :MnO2+Li++e- → MnOOLi
Negative reaction :Li → Li++e-
Total reaction :MnO2+Li → MnOOLi




Maxell was formed in 1960, when a dry cell manufacturing plant was created at the company's headquarters in Ibaraki, Osaka. In 1961, Maxell Electric Industrial Company, Limited was created out of the dry battery and magnetic tape divisions of Nitto Electric Industrial Company, Limited (now Nitto Denko Corporation).

On March 18, 2014, the company was listed on the First Section of the Tokyo Stock Exchange. In 2013, Maxell, Ltd. acquired Hitachi Consumer Electronics, Co., Ltd.’s projector design, development and manufacturing assets and resources. On October 1, 2019, Maxell Corporation of America announced it would assume responsibility for all operations related to both Hitachi- brand and Maxell-brand projector products and accessories in the North American market.


  • Optimum for Memory and RTC Backup
  • Long-term stable operating voltage at low load discharge.
  • High energy density(3V)
    At 3 volts (nominal voltage), it has about twice the voltage of alkaline button batteries and silver oxide batteries.
  • 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 room temperature as well as 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, the high degree of the seal structure and sealant keep self-discharge about 1% per year.
  • Superior high rate discarge characteristics


  • 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)


Voltage (V)
(mAh) *1
Current (mA)
(deg. C)
Dimensions *3Weight
(g) *3
Diameter (mm)Height (mm)
CR2032H32400.2-20 to +8520.03.23.0
  1. Nominal capacity indicates duration until the voltage drops down to 2.0V when discharged at a nominal discharge current at 20 deg. C.
  2. When using these batteries at temperatures beyond the range of 0 to +40 deg. C, please consult Maxell in advance for conditions of use.
  3. Dimensions and weight are for the battery itself, but may vary depending on the shape of terminals or other factors.

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