20.06

LITHIUM MANGANESE DIOXIDE BATTERY

Lithium Manganese

Dioxide Battery

(Li/MnO2)

Safety Instructions

This battery contains lithium, organic solvents, and other combustible materials. For this reason, improper handling of the battery could lead to

distortion, leakage*, overheating, explosion, or fire, causing bodily injury or equipment trouble. Please observe the following instructions to

prevent accidents.

(* Leakage is defined as the unintentional escape of a liquid from a battery.)

 Keep battery out of reach of children.

Swallowing can lead to chemical burns, perforation of soft tissue, and

death. Severe burns can occur within 2 hours of ingestion. If swallowed,

seek medical attention immediately.

 Never charge.

The battery is not designed to be charged by any other electrical

source. Charging could generate gas and internal short-circuiting,

leading to distortion, leakage, overheating, explosion, or fire.

 Never heat.

Heating the battery to more than 100 deg. C* could increase the internal

pressure, causing distortion, leakage, overheating, explosion, or

fire. (* Consult Maxell regarding heat resistant coin type lithium

manganese dioxide batteries.)

 Never expose to open flames.

Exposing to flames could cause the lithium metal to melt, causing

the battery to catch on fire and explode.

 Never disassemble the battery.

Do not disassemble the battery, because the separator or gasket could

be damaged, leading to distortion, leakage, overheating, explosion, or

fire.

 Never reverse the positive and negative terminals when

mounting.

Improper mounting of the battery could lead to short-circuiting,

charging or forced-discharging. This could cause distortion,

leakage, overheating, explosion, or fire.

 Never short-circuit the battery.

Do not allow the positive and negative terminals to short-circuit.

Never carry or store the battery with metal objects such as a

necklace or a hairpin. Do not take multiple batteries out of the

package and pile or mix them when storing. Otherwise, this could

lead to distortion, leakage, overheating, explosion, or fire.

 Never weld the terminals or weld a wire to the body of the

battery directly.

The heat of welding or soldering could cause the lithium to melt, or

cause damage to the insulating material in the battery. This could

cause distortion, leakage, overheating, explosion, or fire. When

soldering the battery directly to equipment, solder only the tabs or

leads. Even then, the temperature of the soldering iron must be

below 350 deg. C and the soldering time less than 5 seconds. Do

not use a soldering bath, because the circuit board with battery

attached could stop moving or the battery could drop into the bath.

Moreover do not use excessive solder, because the solder could

flow to unwanted portions of the board, leading to a short-circuit or

charging of the battery.

 Never use different batteries together.

Using different batteries together, i.e. different type or used and new

or different manufacturer could cause distortion, leakage,

overheating, explosion, or fire because of the differences in battery

property. If using two or more batteries connected in series or in

parallel even same batteries, please consult with Maxell before

using.

 Never allow liquid leaking from the battery to get in your eyes

or mouth.

Because this liquid could cause serious damage, if it does come in

contact with your eyes, flush them immediately with plenty of water

and consult a physician. Likewise, if the liquid gets in your mouth,

rinse immediately with plenty of water and consult a physician.

 Keep leaking batteries away from fire.

If leakage is suspected or you detect a strong odor, keep the battery

away from fire, because the leaked liquid could catch on fire.

 Never touch the battery electrodes.

Do not allow the battery electrodes to come in contact with your skin

or fingers. Otherwise, the moisture from your skin could cause a

discharge of the battery, which could produce certain chemical

substances causing you to receive a chemical burns.

Primary Battery

Warnings — Handling

20.06

This is a primary battery and cannot be charged. If used in memory

or RTC back-up applications, be sure to use diodes to prevent

charging from the main power source or other batteries, and a

protective resistor to regulate the current as shown in the figure

below. Note that the points described below should be taken into

careful consideration when selecting diodes and protective resistors.

 Supplied voltage to load

Because a diode and a resistor generate the voltage drop on

operating, please take into consideration these voltage drops for

supplied voltage to load.

 Using diodes to prevent charging

Please choose diodes with leak current as small as possible. Please

keep the charged capacity due to leak current to within 1% of

nominal capacity.

 Using and setting protective

resistors

A protective resistor is used to

prevent the battery from being

charged by large surges of current

during diode failure. Please set the

resistor so that the maximum

current shown in the right table is

not exceeded. For example, say a

CR2032 battery is used in sample

circuit (A) in combination with a

main power source 5 volt. Since the

permitted charge current is 10mA

and this battery’s voltage is 3V, let

the resistor be

(5V-3V)/10mA=0.2k ohm,

meaning that at least 0.2k ohm is required.

Note: If the diodes broke down, it is necessary for safety to replace

them as soon as possible even though using a protective resistor.

Considering the trouble of diodes and resistors, other safety

measures should be incorporated in the circuit design.

Type

CR2450HR

CR2450HR-Ex

CR2050HR

CR2032HR

CR2032HRS

CR2032H

CR2032

CR2025

CR2016

CR1632

CR1620

CR1616

CR1220

CR1216

Maximum Current

15mA

10mA

4.0mA

2.5mA

3.0mA

2.5mA

The battery may be

regulated by national or

local regulation.

Please follow the

instructions of proper

regulation. As electric

capacity is left in a

discarded battery and

it comes into contact

with other metals, it

could lead to

distortion, leakage,

overheating, or explosion, so make sure to cover the (+) and (-)

terminals with friction tape or some other insulator before disposal.

Load

+5V

Diode

Example (A)

Diode

Example (B)

Load

+5V

Diode

Protective

resistor

BatteryBattery

Diode

(Example of

battery insulation)

Battery

—

Tape

Do not pile up or mix

batteries.

Enlarged view

Electric current flows.

These batteries generate heat.

 Never expose the battery to ultrasonic sound.

Exposing the battery to ultrasonic sound may cause short-circuiting

because the inside material is broken into pieces, leading to

distortion, leakage, overheating, explosion, or fire.

 Never subject the battery to severe shock.

Dropping, throwing or stomping on the battery may cause distortion,

leakage, overheating, explosion, or fire.

 Never short-circuit the battery while installing into equipment.

Please be careful when installing the battery not to short-circuit it with

metal portions of the equipment.

 Use the correct battery suitable for the equipment.

The battery may not be suitable for the specific equipment due to the

using conditions or type of equipment. Please select the suitable

battery according to the handling instructions of the equipment.



Never use or leave the battery in a hot place such as under the direct

rays of the sun or in a car in hot weather.

If you do, this may cause distortion, leakage, overheating, explosion,

or fire.

 Never allow the battery to come in contact with water.

If it does, this may cause the battery to rust or lead to distortion,

leakage, overheating, explosion, or fire.

 Never store the battery in a hot and humid environment.

Otherwise it may cause battery performance deterioration,

deformation, leakage, overheating, or explosion.

 Keep contact force more than 2N.

The battery voltage may be lower than intended value because of

poor contact condition, please keep contact force more than 2N for

suitable contact.

Caution — Handling/Storage

Warnings — DisposalWarnings —

Circuit Design for Back-up Use

20.06

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*

CR2450HR-Ex batteries can even be used at temperatures up to 150

deg. C, depending on other conditions.

 Superior leak-resistant characteristics even under high

temperature and acceleration.

 Can be used even under 2000G, which is equivalent to driving

at 300km/h.

 Electric characteristics are maintained after long periods of

exposure to high temperature and humidity.

* When using at temperatures exceeding 85 deg. C, please consult Maxell in

advance for conditions of use.

120

100

1400

1200

1000

800

600

400

200

0 50 100 150 200

50 100 150 200

Storage time (days)

CR2450

Very little deterioration in capacity due to high storage temperature of 80 deg. C,

compared to CR2450 battery.

Very little deterioration in internal resistance due to high humidity (60 deg. C/90%RH),

compared to

CR2450 battery.

CR2450HR, CR2450HR-Ex

Test condition: 80 deg. C

Storage time (days)

DC resistance (%)

(Compared to pre-storage)

Capacity retention ratio (%)

CR2450

HR-Ex

The heat resistant coin type lithium manganese dioxide battery is a

UL (Underwriters Laboratories Inc.) recognized component.

(Technician Replaceable)

Recognized models: CR2450HR, CR2450HR-Ex, CR2050HR,

CR2032HR, CR2032HRS

Certification Number: MH12568

Negative Electrode (Lithium)

Separator

Gasket

Negative Can

Positive Electrode (MnO

Positive Can

Features

Overview

Construction

Fig. 2 Storage Characteristics under High Temperature/Humidity

 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

Applications

UL Recognized Components

Fig. 1 Storage Characteristics under High Temperatures

Test condition: 60 deg. C/90%RH