High and Low-Temperature 7.2V 2900mAh 2S1P 18650 Lithium-ion Battery Pack

Item No.: TWE389
Model: 18650 2S1P
Nominal Voltage: 7.2V
Nominal Capacity: 2900mAh
Minimum Capacity: 2800mAh
Wide Temperature Range: -40°C to 85°C (discharge)
Certification: CE/RoHS/UN38.3/IEC62133/CB/UL, etc.
Description Brand Introduction Review
Product Specifications
Item Specifications Remark
Model No. LI18650-2900-2S1P
Nominal Voltage 7.2V
Nominal Capacity 2900mAh @0.2C standard charge&discharge
Dimensions 67*37.5*20mm max L*W*H
Cycle Life ≥500 times (25 ℃,0.5 C / 1C )
Charge Method CC/CV
Charge Cut-off Voltage 8.4V
Discharge Cut-off Voltage 5.5V
Standard Charge Current 0.2C
Standard Discharge Current 0.2C
Max Continuous Charge Current 0.5C
Max Continuous Discharge Current 2C
Operating Temperature Range Charge: -20~60℃ -20-10<T≤0℃: 0.1C to 4.1V,
0<T≤10℃: 0.2C to 4.2V,
10<T<60℃: 0.5C to 4.2V
Discharge: -40~85℃ 0<T≤85℃: 2.75V,
-20<T≤0℃: 2.5V,
-40≤T≤-20℃: 2.0V
Storage Temperature Range -20~25℃ 0 - 12 months
-20~45℃ 0 - 6 months
-40~60℃ 0 - 3 months
-40~80 ℃ Within 30 days
Internal Resistance ≤140mΩ
Weight Approx. 98g
Product Advantages
  • Good Rate Performance: Capable of continuous 10A discharge, performing excellently at room temperature.
  • Wide Temperature Operating Range: Suitable for a wide working temperature range from -40℃ to 85℃.
  • High and Low-Temperature Performance: At -40℃, it can still release over 70% of its capacity at a 0.2C discharge rate.
  • Excellent High-Temperature Storage Performance: Exhibits outstanding storage performance in high-temperature environments (80℃).
  • Low-Temperature Discharge Performance: Maintains excellent low-temperature discharge performance even after high-temperature storage.
  • Superior Cycle Performance: Demonstrates good cycle life and stable performance.
Military equipment, aerospace equipment, communication devices, solar street light, GPS, sensor, medical device, outdoor and adventure gear, telecommunication equipment, mining devices, EVSE charger, Camera, etc
Military Equipment
Satellite Phone
Solar Street Light
EVSE Charger
Safety certificate: CE,CB, IEC62133, UL, PSE
Environmental certificate: ROHS, REACH
Quality management certificate: ISO9001, ISO14001, BSCI
Shipping certificate: UN38.3, MSDS, Air/Sea Transport Identification&Classification Report
CE certificate
RoHS certificate
CB certificate
CB certificate
CE certificate
RoHS certificate
CB certificate
CB certificate
CE certificate
RoHS certificate
CB certificate
CB certificate
Production Process
01 Materials Mixing
Fully automatic feeding system,High precision, fully enclosed
02 Coating
High precision constant temperature coating machine
03 Electrode Piece Rolling
Precision automatic roller machine
04 Electrode Piece Slitting
Automatic battery electrode piece continuous slitting machine
08 Injection
Fully automatic bell type liquid injection machine
07 Tab Welding&Beading
Automatic welding machine
06 Into Shell
05 Winding
Automatic winding machine
09 Automatic Laser Welding
10 Formation&Capacity Sorting
Needle bed type charging cabinet
11 Cycle Test
Precision automatic roller machine
12 OQC Test
100% full test on appreance, voltage, capacity, resistance, size, etc
With 20 years experience in battery field, Topwell can arrange the battery ship by Sea / Air / Express.
We can provide you with all DG certification which allows you to ship these batteries,
such as UN38.3 /MSDS /DG. We can ship from Shenzhen,Shanghai,HK...
Brand Introduction

Yichun Topwell Power Co., Ltd (Trademark:TWE) established in 2002, is a high-tech enterprise focusing on the R&D, production and sales of lithium polymer batteries, lithium ion batteries, lithium iron phosphate batteries, and lithium thionyl chloride batteries. Products are widely used in consumer electronics, Internet of Things, smart home, medical, vehicle, home and outdoor energy storage, and have obtained CE, RoHS, Reach, UN38.3, IEC62133, CB, UL, MSDS certifications, etc.


Topwell moves on by providing reliable, efficient and intelligent battery solutions to meet different energy needs. We have efficient engineering, production and quality management teams. From raw material procurement, to production, testing, sales and after-sales service, all steps have been controlled by a strict quality management system. Our factory has passed ISO9001, IS014001, BISI certification, SGS, Intertek audit. With the advantages in price, quality and service, we have established long-term and stable cooperative relationships with many well-known brands. Topwell always attached the great importance to the long term cooperation with customers. No matter the order is big or small, we do our best to support you the highest quality with favorable price. We believe that Topwell Power can be your best battery supplier!


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