C-TECH-I CT-CR2477 User manual

CT-CR2477 Battery Spec Rev: A0 page 1 of 9
CT-CR2477 Battery Spec
电池规格书
Model：
型号: CT-CR2477
Cell Configuration:
客户代码: C12846
Customer P/N:
客户型号： 27563
Nominal Voltage:
标称电压: 3.0V
Capacity:
容量: 950mAh
Draft
起草
Approved
批准
Customer Confirmation
客户确认
Peter
Chun Qi Zeng

CT-CR2477 Battery Spec Rev: A0 page 2 of 9
1. Scope
These specifications are applicable to the manganese dioxide lithium batteries supplied by CTECHI.
2. Applicable Battery Type Manganese dioxide Lithium Battery
3. Battery Type and Performance
3.1 Type CR2477
3.2 Nominal voltage 3.0 volts
3.3 Nominal discharge capacity 950mAh (Load: 7.5K ohm, End voltage 2.0V)
3.4 Outside dimensions As per drawing attached
3.5 Standard weight 8.5g
3.6 Guarantee 1 year (at the temperature of less than
25 deg. C and the relative humidity of
less than 75%RH.)
3.7 Appearance Will be free from flaw, stain,
deformation, uneven tone, electrolyte
leakage and other defects which impair
the value of the commodity
4. Main reference
Item
Unit
Figures
Condition
Nominal Voltage
V
3.0
Only appropriated for CR Battery
Nominal Volume
mAh
950
7.5kΩ continuously discharge load
Instantaneous short-cut circuit
mA
≥350
time≤0.5′
Open circuit Voltage
V
3.25~3.45
All CR Battery series
Storage temperature
℃
0~40
All CR Battery series
Appropriated temperature
℃
-20~60
All CR Battery series
Standard weight
g
Appro 8.5
Only appropriated for this item
Discharge of life
%/yr
≤2
Only appropriated for this item
Quick Test
Use of life
Initial
H
h
≥950
Discharge load 3.0kΩ，Temperature
20±2℃，under the condition of
related humidity≤75%RH
After 12 months
H
h
≥931
Remark1：The electrochemistry of this product, dimension are under IEC 60086-1：2007 standard
（GB/T8897.1-2008，Battery ，Related to 1st part）

CT-CR2477 Battery Spec Rev: A0 page 3 of 9
5. Specification of product and Test method
Exception for specified explanation, all tests should process under below conditions:
（1）Environment Temperature ：Temperature 20±2℃
（2）related humidity：under 60%RH±15%
Test items
Test Methods
Standard
1. Dimension
Use of caliper under precision is 0.02mm
or more precise，to avoid short-circuit,
insulated materials should be put on the
vernier caliper during test.
diameter（mm）： 24.5（-0.20）
height（mm）： 7.7（-0.20）
2. Open circuit voltage
Precision is 0.25% or more precise、
resistance of internal circuit is bigger
than 1 MΩ DDM。
3.25-3.45
3. Instantaneous short-circuit
Using pointer multimeter for test，the
time is not more than 0.5′，avoid
duplicated test，the time for next test
should be after half an hours.
≥350mA
4. Appearance
Visual test
Will be free from flaw, stain,
deformation, uneven tone, electrolyte
leakage and other defects. Installed to
utensils, both terminal of battery
should be under good connections.
5. Quick Discharged Volume
Standard Temperature 20±2℃，related
humidity≤75%，discharge load
3.0kΩ，terminated voltage be 2.0V
≥950 hours
6. Vibrate test
Vibrate frequency 100-150 times per
min under continuously vibration for
1 hour
Stability
7. High temperature-resistant
of weeping performance
Storage 30 days Under 45±2
conditions
leakage %≤0.0001
8. Circuit load of weeping
performance
When terminated voltage is 2.0V,
continuously discharge load for 5hrs
No leakage
Remark2：The bearing boundary dimension of this product, dimension are under IEC 60086-2：2007 standard
（GB/T8897.2-2008，Battery，Related to 2nd part ）
Remark3：
1.Above tests were approved under plenty of experiments.
2.The company completely more stringent than the national standard issued by the GB/T8897 《primary
batteries》standards.
3.If necessary or under customer’s specified requested, our company can adopt any test methods provided by
customers.

CT-CR2477 Battery Spec Rev: A0 page 4 of 9
7. Service life
Load resistance
7.500 ohms
Discharge method
24 hours/day
End voltage
2.0V
Minimum duration (Initial)
2375 hours
Minimum duration (After 12 months storage)
2327.5 hours
Initial test: A test commencing within one month after delivery.
Stored test: A test conducted after 12 months storage under the specified conditions after delivery.
7.Discharge characteristics on load
With load 7.5 kΩ(CR2477)
Voltage（V）
3.5
3.0
20℃
2.5 -10℃ 60℃
2.0
0 600 1200 1800
Time（h）
8. Battery Testing
8.1 Temperature and Humidity
8.1.1 Conditions of Measurement
The battery will be measured under the conditions of temperature of 20±5℃ and relative humidity of
65±15%RH unless otherwise stated.
8.1.2 Conditions of Storage
The sample batteries for testing will be stocked under the conditions of temperature of less
than 25 deg. C and relative humidity of less than 75%.
The test will be carried out within 1 month after storage unless otherwise stated.
8.2 Instruments and Devices for Measurement

CT-CR2477 Battery Spec Rev: A0 page 5 of 9
8.2.1 The DC voltmeter will be used to carry out voltage measurement that can measure from 0V
to 4V. The accuracy of the voltmeter will be +/-1mV or it will be more accurate. The input
impedance will be more than 10M ohm.
8.2.2 All the resistance of the external circuit load resistance will be comprised and the tolerance
will be within 0.5%.
8.2.3 The caliper will be used to conduct dimension measurement and the range for measurement
is from 0mm to 150mm. The accuracy is 5/100mm or more.
8.3 Testing systems
8.3.1 Dimensions
The caliper is used as the instrument for measurement.
8.3.2 Appearance
The visual inspection is applied.
8.3.3 Open circuit voltage
The DC voltmeter is used to measure the voltage between both terminals
8.3.4 Service Life
The battery samples are kept under the condition of temperature of 20+/-5 deg. C for over 12 hours. The
battery samples will be discharged persistently through the discharge load mentioned in Table 1. The
discharge test will be conducted till the discharge voltage falls down to not less than the final voltage
specified in Table 1. The discharge time is the service life while the discharge voltage remains above the
final voltage as stated.
8.3.5 Resistance of electrolyte leakage
The visual inspection is used for checking the state of the leakage. The battery will be put 30cm away
under 40 watt fluorescent lamp at one meter above.
9. Limited warranty
If defective in materials or workmanship is identified, please return the product to CTECHI. and the
replacement will be delivered without charge.
Please note that the only obligation under this warranty is the replacement of the battery.
Other loss, damage, destruction, any legal liabilities, cost or expense including consequential
loss of whatsoever nature, directly or indirectly caused by, resulting from or in connection
with use of or inability to use the product are expressly excluded.
(2) The work on the battery needs to comply with the instructions in this specification;
otherwise, CTECHI. cannot warrant any battery performance included but not limited to safety and the
customer shall be responsible for all claims, demands, loss, damage, actions or proceedings, and costs (legal
or otherwise) caused by this battery.
(3) It is the customer’s responsibility for the matching and reliability of batteries on actual set or
unit application.

CT-CR2477 Battery Spec Rev: A0 page 6 of 9
(4) CTECHI. will not be responsible for the following situations:
(i) Inappropriate handling, use, installation, or examination of the battery.
(ii)Do not comply with the instructions, attentions or warnings mentioned in this
specification.
(iii) Do not comply with the instructions or advice of CTECHI.
10. Others
Subject the RoHS directive, this battery does not contain the following chemical substance:
lead, mercury, cadmium, hexavalent chromium, bromic,
fire retardants (polybrominated biphenyl (PBB), polybrominated diphenyl (PBDE)
11. Drawing Packing 包装图
11.1 托盘装，200PCS/包；每包配锂电池标签一张（要求标签大小不超出托盘凹槽，边缘裁剪整齐）；热
缩膜将标签吸塑在内（要求热缩薄膜吸塑平整）；每箱不超过 10kg；使用‘CTECHI’纸箱和封箱胶包
装。
11.2 每箱两个侧面都需贴客户型号、箱唛（要求客户型号标签贴纸箱侧面左下角，箱唛标签贴纸箱侧面
右上角。标签需贴正，每箱共四张标签。）
锂电池标签格式： 箱唛标签格式（中文部分不需打印）： 客户型号标签格式：
下图只供参考贴标签位置，标签内容请忽略，贴标位置如下：
（图一） （图二）
（注：标签大小必须按照‘图一’，整齐裁剪、摆放，不得大于托盘。）

CT-CR2477 Battery Spec Rev: A0 page 7 of 9
Instructions for Usage and Safety
The battery consists of lithium, organic, solvent, and other combustible materials. Proper handling of the battery is of
utmost importance; otherwise, the battery could lead to distortion, leakage (accidental
seepage of liquid), overheating, explosion, or fire and cause bodily injury or damage to equipment. Please strictly
comply with the following instructions to avoid the occurrence of accident.
WARNING for Handling
Do Not Ingest
The battery should be property stored and keep away from children in order to avoid them to put it into their
mouths and ingest it. However, if it happens, you should immediately take them to the hospital.
Do Not Recharge
The battery is not a rechargeable battery. You should never charge it as it could generate gas and internal
short-circuiting, leading to distortion, leakage, overheating, explosion, or fire.
Do Not Make Hot
If the battery is being heated to more than 100 degree centigrade, it would increase the internal pressure resulting
distortion, leakage, overheating, explosion, or fire.
Do Not Burn
If the battery is burnt or put to flame, the lithium metal will melt and cause explosion or fire.
Do Not Dismantle
The battery should not be dismantled as it will cause damage to separator or gasket resulting distortion, leakage,
overheating, explosion, or fire
Do Not Make Improper Setting
The improper setting of the battery could lead to short-circuiting, charging or forced-discharging and distortion,
leakage, overheating, explosion, or fire could be occasioned as a result. When setting, the positive and negative
terminals should not be reversed.
Do Not Short-circuit The Battery
The short-circuit should be avoided for positive and negative terminals. Do you carry or keep battery with metal
goods; otherwise, battery could occasion distortion, leakage, overheating, explosion, or fire.
 Do Not Directly Weld The Terminal or Wire to The Body of The Battery
The welding will cause heat and occasion lithium melted or insulating material damaged in the battery. As a
result, the distorting, leakage, overheating, explosion, or fire would be caused. The battery should not be soldered
directly to equipment which it must be done only on tabs or leads. The temperature of soldering iron must not be
over 50 degree C and the soldering time must not be more than 5 seconds; it is important to keep the temperature
low and the time short. The soldering bath should not be used as the board with battery could stop on the bath or
the battery could drop into the bath. It should avoid taking excessive solder because it could go to unintended
portion on the board resulting short or charge of the battery.
 Do Not Use Different Batteries Together
It must be avoided for using different batteries collectively because batteries of different types or used and new or
different manufacturers could occasion distortion, leakage, overheating, explosion, or fire. Please obtain advice

CT-CR2477 Battery Spec Rev: A0 page 8 of 9
from CTECHI. if it is necessary for using two or more batteries connected in series or in parallel.
Do Not Touch The Liquid Leaked Out of Battery
In case the liquid leaked and get into the mouth, you should immediately rinse your mouth. In case the liquid gets
into your eyes, you should immediately flush eyes with water. In any event, you should go to the hospital and
have proper treatment from a medical practitioner.
Do Not Bring Fire Close to Battery Liquid
If the leakage or strange smell is found, immediately put the battery away from fire as the leaked liquid is
combustible.
Do Not Keep in Touch with Battery
Try to avoid keeping the battery in touch with the skin as it will get hurt.
WARNING for Disposal
There are different regulations in different countries or regions and please comply with those regulations. In general,
the insulating tape or friction tape should be used to cover the (+) and (-) terminals before disposal. It is because the
discarded battery still has electric capacity and when it is in touch with other metals or materials, it could occasion
distortion, leakage, overheating, or explosion.
WARNING for Circuit Design for Back-up Use
The battery is not rechargeable. It is important that the diodes are applied for prevention of charging from the main
power or other batteries when the battery is used for the device having memory or RTC back-up applications. In
addition, the application of protective resistance is necessary as it can regulate the current as shown in the figure below.
The following points have to be paid attention when choosing diodes and protective resistance.
Supplied voltage to load
Due to the application of a diode and a resistance, the voltage generated will drop during operation, you are
reminded to pay attention to these drops of voltage for supplied voltage to load.
Prevent charging by applying diodes
It is recommended to use the least leak current diodes. The charged capacity owing to leak current should be
maintained within 1% of nominal capacity.
Using and setting protective resistance
In order to refrain from changing the battery by large surges of current when the diode is failed, the protective
resistance should be applied. It is recommended to adjust the protective resistance to make the maximum current
not over the figures as stated in the table.
CAUTION (Handling / Storage)
Do Not place the battery in ultrasonic
The short-circuit may be caused if the battery is placed in ultrasonic as the materials inside may be powdered
occasioning distortion, leakage, overheating, explosion, or fire.
 Do Not roughly handle the battery
Distortion, leakage, overheating, explosion, or fire might be caused if the battery is received heavy impact or
strong shock.
 Do Not short-circuit the battery while putting into equipment
It is advised to put the battery to the equipment in a prudent way. It is because the short-circuit may occurs to the
battery through metal parts of the equipment.
 Do Not maintain contact pressure less than 2N
Due to the poor contact condition, the intended value may be higher than the battery voltage. For appropriate

CT-CR2477 Battery Spec Rev: A0 page 9 of 9
contact resistance, the contact pressure must be maintained not less than 2N.
 Do Not wrongly match the battery and equipment
Please use the proper battery conforming to the handling manual of the equipment. It is because the
specifications or types of equipments are different and the battery may not fit all kinds of equipments.
 Do Not put the battery in hot place such as under the sun or in the car in the daytime
If the battery is put in hot place, it may cause distortion, leakage, overheating, explosion, or fire of the battery.
 Do Not allow the battery touch water
If the battery touches water may occasion distortion, leakage, overheating, explosion, or fire. It may also
generate rust.
 Do Not stock the battery in the condition of high humidity and heat
In the high humid and hot condition, the battery may deteriorate. It may cause the battery distorted, leaked,
overheated, or exploded.
SPECIFICATION FOR INSPECTIONS
It is guaranteed that this specification of the inspections will be fulfilled by our products. CTECHI. shall identify the cause
of the problem and proceed to take remedial actions if the products do not fulfill this specification of inspections.
1. Quality Standard
The product specification will be conformed.
2. Unit of Inspections
One battery will be taken as one unit of inspection.
3. Definition of Lot
A batch of products that are manufactured by the same production lines with the same lot code mark.
4. Test Method
The product specification will be conformed.
5. Sampling Plan
The following table is referred and is only used for the initial test.
Inspection Item
Inspection Plan
Sampling Level
A.Q.L
1
Dimensions
GB/T8897.2-2008
China National Standard
1.0
2
Open Circuit Voltage
GB/T8897.2-2008
China National Standard
1.0
3
Appearances
GB/T8897.2-2008
China National Standard
1.5
Major Defect: If there is failure on the functions of the products, it will be construed as major defect.
Others: Defect that is distinguished from Major Defect.
The operating features by attributes are used as a base for sampling inspections.