heat-resistant batteries

Maxell’s original sealing technology and highly heat-resistant material expands operating temperature range remarkably, making the batteries supremely suitable for automobile applications — for powering TPMS (Tire Pressure Monitoring System) sensors, for example.
The range of technologies where these batteries can be applied is expanding to include IoT sensors and HACCP temperature loggers that require a wide operating temperature range.


Wide operating temperature range: -40 deg. C to +125 deg. C*

* When using at temperatures exceeding 85 deg. C, please consult Maxell in advance for conditions of use.

Superior leak-resistant characteristics even under high temperature and acceleration.

Can be used even under 2000 G, which is equivalent to driving at 300 km/h.

Even when exposed to high temperature or humid atmosphere for long periods of time, the increase in internal resistance can be suppressed.

About Maxell Heat Resistant CR batteries

Maxell Heat Resistant 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. When built-in Heat Resistant CR batteries need to be replaced, please contact your equipment manufacturer. If you are planning to use Maxell Heat Resitant CR batteries in your equipment as a built-in part, please contact Maxell.

UL Recognized Components

The heat resistant coin type lithium manganese dioxide battery is a UL recognized component. (Technician Replaceable)

Recognized model: CR2450HR, CR2050HR, CR2032HR, CR2032HRS

Certification Number: MH12568


  • TPMS (Tire-Pressure Monitoring System)
  • ETC (Electronic Toll Collection systems)
  • Keyless entry systems
  • Seat location sensors
  • Communication tags, beacons
  • Temperature data loggers (HACCP temperature loggers)
  • Logistics tags
  • FA instruments (measuring instruments, onboard microcomputers, sensors)
  • IoT sensors


Model CR2032HRS CR2032HR CR2050HR CR2450HR
Nominal voltage (V) 3 3 3 3
Nominal capacity (mAh)*1 200 200 350 550
Nominal discharge current (mA) 0.2 0.2 0.2 0.2
Operating temperature range (deg. C)*2 -40 to +125
Acceleration resistance Max. 3300 G Max. 2000 G
Dimensions*3Diameter (mm) 20.0 20.0 20.0 24.5
Height (mm) 3.2 3.2 5.0 5.0
Weight (g)*3 3.0 3.0 4.1 6.8
Data sheets - PDF PDF PDF
Diagram of with Terminals - PDF PDF PDF
Warnings PDF
  • Nominal capacity indicates duration until the voltage drops to 2.0 V when discharged at a nominal discharge current at 20 deg. C.
  • When using these batteries at temperatures exceeding 85 deg. C, please consult Maxell in advance for conditions of use.
  • 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 your nearest Maxell office.
  • Contents on this website are subject to change without notice.



Principle and Reactions

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

Storage Characteristics under High Temperatures

storage characteristics under high temperatures

Little deterioration in capacity due to high storage temperature of 80 deg. C, compared to CR2450 battery.

Storage Characteristics under High Temperature/Humidity

storage characteristics under high temperature/humidity

Little deterioration in internal resistance due to high humidity (60 deg. C/90%RH), compared to CR2450 battery.

Discharge Characteristics

discharge characteristics


Temperature Characteristics

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

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