Micro BatteriesAlkaline Manganese Batteries

Alkaline manganese batteries are small-sized primary batteries with high performance. They are suitable for various applications such as toys,
medical devices and health appliances. All models are 100% made in Japan, and environmentally friendly (0% mercury).

Alkaline manganese batteries

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Selection Guide

Extensive product lineup from small & thin size to high capacity models

Ideal for medical devices that require high current load characteristics


  • Excellent cost performance
    High cost performance has been achieved owing to the use of manganese dioxide as a cathode material.
  • Excellent stable discharge and high-drain pulse discharge characteristics
    Stable voltage output is available during the high-drain pulse discharge.
  • Excellent leakage resistance
    Murata-unique sealing structure, coupled with special sealing- material treatment, has helped accomplish the excellent leakage resistance.
  • RoHS directive・European Directives
    This product does not contain Mercury (Hg), Cadmium (Cd), nor Lead (Pb), and conforms to EC regulation values (Directive 2006/66/EC, 2013/56/EU).
    Battery pack are excluded from RoHS directive
    (DIRECTIVE 2011/65/EU OF THE EUROPEAN PARLIAMENT AND OF THE COUNCIL of 8 June 2011 on the restriction of the use of certain hazardous substances in electrical and electronic equipment).


  • Medical devices
  • Electric thermometers
  • Crime prevention buzzer
  • Toys

Series Lineup

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Part Number Status Nominal Capacity Diameter (inch) Diameter (mm) Height (inch) Height (mm) Mass (oz) Mass (g) Nominal Voltage Operating Temperature Range IEC (JIS)
70mAh 0.457inch 11.6mm 0.12inch 3.05mm 0.0423oz 1.2g 1.5V -10℃ to 60℃ LR54
45mAh 0.311inch 7.9mm 0.142inch 3.6mm 0.0201oz 0.57g 1.5V -10℃ to 60℃ LR41
110mAh 0.457inch 11.6mm 0.165inch 4.2mm 0.0564oz 1.6g 1.5V -10℃ to 60℃ LR43
120mAh 0.457inch 11.6mm 0.213inch 5.4mm 0.0705oz 2.0g 1.5V -10℃ to 60℃ LR44
150mAh 0.457inch 11.6mm 0.213inch 5.4mm 0.0705oz 2.0g 1.5V -10℃ to 60℃ LR44
  • *Data is not guaranteed, and is provided for reference purposes only.
  • *Please contact us for other models.

Principle of Alkaline manganese Battery

Manganese dioxide (MnO2) is used for the active cathode material, and specially processed fine zinc-alloy powder is used for the active anode material. Potassium hydroxide is used as an electrolyte.
Battery discharge reactions are follows

Principle of Alkaline manganese Battery

With open circuit voltage of approx. 1.50V,
the battery voltage is extremely stable and impedance remains low during discharge.

Discharge Characteristics after Storage for Alkaline manganese Battery based LR44

Discharge Characteristics on Load for Alkaline manganese Battery based LR44
  • 60°C 20-days and 60°C 40-days storage conditions are equivalent to 1 years and 2 years, respectively, at room temperature.
  • Excellent long-term reliability
  • After storage, decrease in discharge time is minimal.

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