1
CR
CR
20.06
CR
LITHIUM MANGANESE DIOXIDE BATTERY (CYLINDRICAL)
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
2
CR
CR
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 CR17450A battery is used in sample
circuit (A) in combination with a main power source 5 volt. Since the
permitted charge current is 20mA and this battery’s voltage is 3V, let
the resistor be R
>
=
(5V-3V)/20mA=0.1k ohm, meaning that at least
0.1k 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
CR17450AH
CR17450A
CR17335A
Maximum Current
20mA
20mA
20mA
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
Diode
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 resistance.
Caution — Handling/Storage
Warnings — DisposalWarnings —
Circuit Design for Back-up Use
(Example of battery
insulation)
Tape
+
−
Tape
3
CR
CR
20.06
Maxell’s cylindrical type lithium manganese dioxide battery realizes stable discharge characteristics with its original sealing structure, improved
electrical-conductivity structure, and negative electrode material. This battery’s long-term reliability makes it ideal for use as a power source in
industrial applications such as IoT devices and smart meters (e.g. gas, water, electricity). Battery packs can also be produced to meet special
customer requirements. For details, please contact your nearest Maxell dealer or distributor.
■ High energy density
High energy density has been achieved by optimizing the filling rate
of the material by means of a unique electrode structure.
Long-term reliability lasting more than 10 years*
The employment of a heat-resistant gasket and a laser-seal structure
prevents water intrusion and electrolyte evaporation, ensuring
long-term reliability that lasts more than 10 years. The self-discharge
rate is about 0.5% per year.
Stable discharge characteristics
The original negative electrode material maintains low internal
resistance even at high depths of discharge and ensures stable
discharge.
Superior low-temperature characteristics
High safety due to internal short-circuit prevention structure
Supports various package design configurations
Package design proposals are available according to the customer’s
needs.
We have designed a wide range of packages for 1 to 35 batteries.
* Designed lifetime at 20 deg. C when not yet used.
Actual lifetime will vary depending on conditions such as discharge current and
temperature.
The cylindrical type lithium manganese dioxide battery uses
manganese dioxide (MnO
2
) as its positive active material, and lithium
(Li) as its negative active material.
Smart meters (e.g. gas, water, electricity) �� IoT devices
Communication devices (e.g. 3G, LTE, LPWA)
In-vehicle devices Security devices
Memory backup power
Battery reactions
Positive reaction: MnO
2Li
+
e
–
MnOOLi
Negative reaction: Li Li
+
e
–
Total reaction: MnO
2Li
MnOOLi
Collector
(Copper Foil)
Separator
Gas Release Vent
Positive Terminal
Collector
Gasket
Laser Seal
Negative
Electrode
(Li alloy)
Positive
Electrode
(MnO2)
Negative Can
The cylindrical type lithium manganese dioxide battery is a UL
(Underwriters Laboratories Inc.) recognized component.
(User Replaceable)
Recognized models: CR17450A, CR17335A, CR17450AH
Certification Number: MH12568
Overview
Features
Applications
Principle and Reactions
UL Recognized Components
Products
Construction
Battery power system for IoT
35 parallel batteries for outdoor usage
Model
CR17450AH
CR17450A CR17335A
Nominal Voltage (V)
3 3 3
Nominal Capacity (mAh)
*1
3000 2500 1650
Nominal Discharge Current (mA)
1 5 5
Operating Temperature
Range (deg. C)
40 to 85
Dimensions
*2
Diameter (mm)
17 17 17
Height (mm)
45 45 33.5
Weight (g)
*2
24
22 17
*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 Dimensions and weight are for the battery itself, but may vary depending
on terminal specications and other factors.
• Data and dimensions are just reference values. For further details,
please contact your nearest Maxell dealer or distributor.