1
20.06
Danger
Do not dip or wet the battery in water, seawater, or other liquid.
Otherwise the battery may be shorted, which may generate heat
or cause damage.
Do not put the battery into a fire. Otherwise, the electrolyte may
burn or cause an explosion or fire.
Do not heat the battery. Otherwise heating the battery could
increase the internal pressure, causing leakage, explosion,
overheating or fire.
The battery has a predetermined polarity. If the battery will not
connect well to the charger or equipment, do not try to connect
the battery forcefully. Check the polarity first. If the battery is
connected in reverse, it will be charged in reverse and may cause
distortion, leakage, overheating, explosion or fire due to an
abnormal chemical reaction during charge or an excessive current
during discharge.
Do not let the battery terminals (+ and –) come into contact with a
wire or any metal (like a metal necklace or a hairpin) with which it
is carried or stored. In such a case, the battery will be shorted and
discharge excessive current, which may result in overheating,
explosion, fire or heat generation of the metal necklace or the
hairpin.
Do not apply any heavy impact to the battery, throw or drop it. Do
not apply heavy load to the battery causing distortion. Otherwise
the battery may be shorted and result in leakage, overheating,
explosion or fire.
Do not drive a nail into, hammer or stamp on the battery.
Otherwise the battery may be shorted and result in destruction,
distortion, overheating, explosion or fire.
Do not weld a terminal or weld a wire to the body of the battery
directly. The heat of welding or soldering could cause damage to
the insulating material or the structure in the battery, leading to
distortion, leakage, overheating, explosion, or fire. When soldering
the battery directly to equipment, use the battery with tabs or
leads and solder only the tips of the tabs or leads. 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 by connecting to power source.
The battery contains 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. The following are general cautions
and guidelines only and as such may not include every possible
usage scenario. The manufacturer will not be liable for actions taken
Select the correct type of battery to match the operating conditions
such as load current, etc.
Charge conditions
To get the most out of coin type lithium-ion batteries and use them
safely, please use specified charge IC, protection IC and read the
following requirements carefully: For different charge IC, protection
IC, consult your nearest Maxell dealer or distributor.
Charge control flowchart (sample)
Refer to the following flowchart when designing constant current and
constant voltage battery chargers.
Charge IC
Charge method
Charge voltage
Standard charge current
Max. charge current
Charge temperature
Specified IC by Maxell
Constant current, constant voltage charge
4.20±0.05V / cell
0.5I
t
A
1.0I
t
A
0 to +45 deg. C
Notes for Designers
Charge conditions
Protection IC
Specified IC by Maxell
Protection conditions
Start charge
Constant current, constant voltage charge
• Current monitoring
• Temperature monitoring
• Time monitoring
Failed
Failed
Passed
Passed
Check battery connection
Check battery temperature
Check battery voltage
Charge completion
Preliminary charge
Abnormal charge stop
COIN TYPE LITHIUM-ION RECHARGEABLE BATTERY (CLB)
CLB
Coin Type Lithium-ion
Rechargeable Battery
Secondary Battery
Notes for Designers
Safety Instructions
or accidents caused.
(* Leakage is defined as the unintentional escape of a liquid from a
battery.)
2
CLB
20.06
Warnings
Do not swallow. Always keep the battery out of the reach of
infants and young children to prevent it from being swallowed. If
swallowed, consult a physician immediately. Swallowing may lead
to burns, perforation of soft tissue, and death. Severe burns can
occur within 2 hours of ingestion.
Do not put the battery in a microwave oven or a pressure cooker.
Sudden heat may damage the seal of the battery and may cause
overheating, explosion or fire.
Do not use the battery together with a primary battery such as a
dry battery or other battery of a different capacity, type and/or
brand. In such a case, over-discharge during use or over-charge
during charging may occur and abnormal chemical reactions may
cause heat generation, explosion or fire from the battery.
Design your equipment so that the end user cannot replace the
battery by mistake. If you are an equipment manufacturer and
need to replace the battery, please use a new one of the same
type and same model as the existing one. Because this is a
rechargeable battery, its characteristics are completely different
from other primary batteries (e.g. coin type lithium manganese
dioxide batteries: CR) or other secondary batteries (e.g. lithium
manganese dioxide rechargeable batteries: ML) even though their
shapes are alike. If a different battery is installed in the circuit in
place of a CLB battery, gas could be generated or the primary
battery could be short-circuited by charging. This could lead to
distortion, leakage, overheating, explosion or fire.
If you notice any unusual odor, heat, discoloration, deformation or
any other characteristic apart from what you are used to while
using, charging or storing the battery, then take it out of the
equipment or charger, and avoid using it. Using it in such state
may result in overheating, explosion or fire.
Caution
Use protection circuit in the application or a battery pack in order
to prevent over-charge or over-discharge. Excess charge current
or charge voltage may cause distortion, leakage, overheating,
explosion or fire.
Do not allow the battery electrodes to come in contact with your
skin or fingers. Do not stick the battery on skin with adhesive tape
or glue. Otherwise the moisture from your skin could cause a
discharge of the battery, which could produce certain chemical
substances causing you to receive chemical burns.
Please be careful when installing the battery not to short-circuit it
with metal portions of the equipment. Otherwise this could lead to
distortion, leakage, overheating, explosion or fire.
Keep the contact force at more than 2N for stable contact.
Otherwise the battery voltage may be lower than intended value
due to poor contact condition.
Do not use or leave the battery in a hot and highly humid place
such as under the direct rays of the sun or in a car in hot weather.
It may cause distortion, leakage, overheating, explosion or fire.
Do not leave the battery or battery pack being charged after
charge is finished. Otherwise it may cause the degradation of
battery performance, such as a shortening of battery life.
When the battery is expected not to be used for a long time, take
the battery out of the equipment or device and store it in a less
humid area.
Do not use the battery in other than the following temperature
ranges:
Please consult Maxell in advance for information about soldering
conditions.
Do not disassemble or alter the battery. Otherwise the insulating
materials or the inside structure could be damaged, leading to
distortion, leakage, overheating, explosion or fire.
After long periods of storage without being used, the battery
should be charged before it is used. Charge the battery every 6
months to the level specified by the manufacturer, even if the
battery is not used. Otherwise over-discharging the battery may
cause an abnormal chemical reaction in the battery and result in
the degradation of battery performance, such as a shortening of
battery life, distortion, leakage, overheating or fire.
When charging the battery, always follow the charge conditions
specified by the manufacturer. If the battery is charged under
other conditions (a high temperature, a high voltage/current or an
altered charger) not specified by the manufacturer, the battery
may cause distortion, overheating, explosion or fire due to
abnormal chemical reactions.
Do not connect the battery directly to an electric outlet or cigarette
lighter socket in a car. Applying a high voltage may generate an
excessive current and cause an electric shock. In such a case, the
battery may leak electrolyte, overheat, explode or cause fire.
Do not use or leave the battery near fire, heaters, inside an
automobile in hot weather or under strong sunshine. Such
conditions of high temperature may damage the separator, and
the battery may be shorted and result in overheating, explosion or
fire.
Do not use the battery with any equipment or device other than
those specified by the manufacturer. Any such practice may
expose your equipment or device to an abnormal current, which
may result in distortion, overheating, explosion or fire.
Charge
Discharge
Storage (less than 30 days)
Storage (less than 90 days)
0 deg. C to +45 deg. C
20 deg. C to +60 deg. C
20 deg. C to +50 deg. C
20 deg. C to +35 deg. C
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.
(Example of
battery insulation)
Battery
+
–
Tape
Do not pile up or mix
batteries.
Enlarged view
Electric current flows.
These batteries generate heat.
Warnings — Disposal
If the battery leaks or emits an unusual odor, remove it from the
vicinity of any fire immediately. The electrolyte may catch fire,
which may cause explosion or fire.
Do not let leaked electrolyte come into contact with the eyes. In
the event of such contact, flush the eyes with plenty of water
immediately and consult a doctor. Otherwise prolonged contact
may cause serious injury.
When charge does not stop in an expected period of time, stop
charging. Otherwise the battery may cause overheating, explosion
or fire.
3
CLB
20.06
Developed by Maxell, the coin type lithium-ion rechargeable battery has a high-rate discharge characteristic of up to 2
I
t
A
by means of an original
stacked electrode structure. This compact high-power rechargeable battery is designed for small portable devices such as IoT devices, wearables
and hearables that have communication functions.
High power
A unique stacked electrode structure enables power of up to 140mA
(CLB2032).
Discharge capability of CLB2032 is approximately 40 times
better*
* Compared with Maxell’s CR2032 at 60% available capacity
Excellent cost performance
Superior recharging properties ensure a service life of about 500
charge/discharge cycles under normal usage conditions. The
superior cost/performance ratio ensures that lithium-ion batteries are
ultimately more economical than primary batteries.
High reliability
Maxell has incorporated unique technologies gained during its
development of crimping and electrode coating. The stainless steel
battery body minimizes swelling.
Superior safety
Separator-wrapped positive electrodes prevent to make internal
short-circuit. Safety is ensured even if external short-circuit occurs.
Biological information monitoring systems
Wearable data devices Medical sensor networks
Environment monitoring systems
Logistics management systems Rechargeable hearing aids
Remote keyless entry systems (RKE) Multifunction watches
• UL 1642 Recognized models (Technician Replaceable): CLB2032,
CLB2016, CLB937A, CLB740H
Certification Number: MH12568
• IEC 62133-2 Recognized models: CLB2032, CLB937A, CLB740H
• UN 38.3 (Dangerous goods transportation regulations)
Recognized models: CLB2032, CLB2016, CLB937A, CLB740H
Discharge load characteristics
Discharge temperature characteristics
Cycle life characteristics
Charge characteristics
0 0.5 1.0 1.5 2.0 3.02.5
4.5
4.0
3.5
3.0
2.5
2.0
Cell voltage (V)
Time (hour)
100
50
0
50
40
30
20
10
0
Charge capacity (%)
Charge current (mA)
Charge current
Cell voltage
Charge: 35mA (0.5I
t
A) /4.2V (CCCV)/
End current 2mA
Temperature: 20 deg. C
Charge capacity
4.4
4.2
4.0
3.8
3.6
3.4
3.2
3.0
Cell voltage (V)
Capacity (mAh)
0 80604020 70503010
60 deg. C
Charge: 35mA (0.5I
t
A)/4.2V (CCCV)/End current 2mA
Discharge: 14mA (0.2I
t
A) (E.V. = 3.0V)
20 deg. C
4.4
3.0
3.2
3.4
3.6
3.8
4.0
4.2
Cell voltage (V)
Capacity (mAh)
0.5
I
t
A (35mA)
Charge: 35mA (0.5I
t
A)/4.2V (CCCV)/End current 2mA
Temperature: 20 deg. C
0 20 40 806010 30 7050
0 100 200 300 400 500
Cycle number (cycle)
80
70
60
50
40
30
20
10
0
Capacity (mAh)
Charge: 35mA (0.5I
t
A)/4.2V (CCCV)/End current 2mA
Discharge: 14mA (0.2I
t
A) (E.V. = 3.0V)
Temperature: 20 deg. C
0 deg. C
–10 deg. C
–20 deg. C
0.2
I
t
A (14mA)
1
I
t
A (70mA)
2I
t
A (140mA)
Overview
Features
Certification
Characteristics (CLB2032)
Applications
Products
Please consult Maxell in advance for information about soldering conditions.
Model CLB2032 CLB2016 CLB937A CLB740H
Initial
dimensions
(mm)
*1
Diameter
20 20 9.5
7.85
Height
*2
3.45 2.0 3.9
4.0
Weight (g)
*1
3.0 2.1 0.7
0.5
Charge
(CCCV)
Max. voltage (V)
4.2 4.2 4.2
4.2
Standard current (mA)
35 15 9
9.5
Temperature (deg. C)
0 to 45
Discharge
(CC)
End voltage (V)
3.0 3.0 3.0
3.0
Max. current (mA)
140 60 36
19
Temperature (deg. C)
20 to 60
Nominal voltage (V)
3.7 3.7 3.7
3.8
Nominal capacity (mAh)
*3
70 30 18
19*
4
*1 Dimensions and weight are for the battery itself, but may vary depending on
terminal specifications and other factors.
*2 100% charged
*3 Nominal capacity is according to the following conditions: Charge: 0.5
I
t
A/4.2V
(CCCV)/End current 0.03
I
t
A, Discharge: 0.2
I
t
A/E.V. = 3.0V, Temperature 20 deg. C
*4 Nominal capacity is according to the following conditions: Charge: 0.5
I
t
A/4.2V
(CCCV)/End current 0.03
I
t
A, Discharge: 1mA/E.V. = 3.0V, Temperature 20 deg. C
• Data and dimensions are just reference values. For further details, please contact
your nearest Maxell dealer or distributor.