ICR18650 3.7V 2600mAh Li-ion Cell with button top for Industrial Handheld Terminals, Portable Instruments, Battery Pack Assembly
| Parameter | Specification |
|---|---|
| Model | VTC-ICR18650 |
| Battery Type | Cylindrical Lithium-ion Rechargeable Cell |
| Nominal Voltage | 3.7V |
| Typical Capacity | 2600mAh, standard charge/discharge |
| Minimum Capacity | 2500mAh, standard charge/discharge |
| Internal Impedance | ≤40mΩ, AC 1kHz |
| Standard Charge | 0.5C (1250mA), CC-CV to 4.2V, 0.05C (125mA) cut-off |
| Weight | 46.0 ± 1.5g |
| Max Dimensions | Diameter 18.5mm, height 67.5mm |
| Charging Temperature | 0°C to 50°C with temperature-dependent charge-rate limits |
| Discharging Temperature | -20°C to 60°C with temperature-dependent discharge-rate limits |
| Cycle Life | ≥600 cycles to 80% capacity under 4.2V charge; ≥1000 cycles to 70% capacity under 4.1V charge |
3.7V ICR18650 2600mAh Lithium Battery Factory in China
The VTC-ICR18650 is a cylindrical Li-ion rechargeable cell designed for equipment manufacturers that need a 3.7V 18650 format with 2600mAh typical capacity and 2500mAh minimum capacity. The datasheet specifies standard charging at 0.5C (1250mA) with CC-CV charging to 4.2V and 0.05C cut-off, discharge cut-off at 2.75V, internal impedance of no more than 40mΩ at AC 1kHz, and a maximum continuous discharge current of 3C (7500mA) with temperature cut-off control at 70°C. With a maximum diameter of 18.5mm, height of 67.5mm, and 46.0 ± 1.5g weight, this cell is suitable for compact rechargeable battery designs where energy density, repeatable batch supply, and stable electrical performance matter. VTCBATT supports factory supply, sample development, OEM/ODM pack design, tab or nickel strip configuration, labeling, and wholesale lithium battery sourcing for distributors and equipment brands.
Full Certification & Extended Warranty
VTCBATT Lithium ion batteries meet global certifications including CB, CE, UL, and UN38.3, and offer a 14-month warranty—two months longer than standard—to maximize customer confidence and profit.
CertificationVTCBATT lithium polymer batteries have passed numerous important international certifications, including UL1642, IEC62133, UN38.3, CE, ROHS, BIS and EU2024/1542, CE, ROHS, REACH, and KC certifications.
WarrantyVTCBATT Lithium batteries come with a 14-month warranty, 2 months longer than the standard 12-month warranty, providing extra coverage for shipping and customs clearance. This ensures customer confidence.
CustomizationDifferent sizes,capacities, connectors, discharge rates,and cases. Just inform us of your specific requirement, and our professional engineers can provide you with the customized Lithium battery proposal.
Flexible order quantity to support prototype testing and mass production.
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Batteries certified to UL, CE, UN38.3, MSDS, ROHS, IEC62133, and more global standards.
icr18650 3.7v 2600mah cylindrical li-ion rechargeable cell Outline Dimensions
| No. | Items | Value |
|---|---|---|
| 1 | Diameter (Φ1) | 18.5mm MAX |
| 2 | Diameter (Φ2) | 6.0mm MAX |
| 3 | Height (H) | 67.5mm MAX |
3C Continuous Discharge Support
The datasheet supports a maximum continuous discharge current of 3C (7500mA), with cut-off temperature control at 70°C. This makes the cell suitable for rechargeable equipment that needs stronger current delivery than low-drain cells, while still requiring engineers to follow the specified temperature and cut-off limits in the pack design.
High-Energy 18650 Cell
The VTC-ICR18650-2600H provides a 3.7V cylindrical 18650 platform with 2600mAh typical capacity and 2500mAh minimum capacity under standard charge and discharge conditions. Its familiar 18.5mm by 67.5mm format supports compact rechargeable power designs for handheld terminals, field instruments, and OEM battery packs where space and usable runtime both matter.
Long Cycle Life Design
For cycle-life planning, the datasheet lists at least 600 cycles to 80% capacity under 4.2V charge conditions and at least 1000 cycles to 70% capacity under 4.1V charge conditions. These source-backed values help OEM teams compare pack strategies and select charging limits for rechargeable industrial products with repeat-use requirements.
OEM Pack Assembly Ready
The VTC-ICR18650-2600H can be used as a source cell for custom rechargeable pack development when the electrical limits, charge method, and mechanical dimensions match the equipment design. VTCBATT supports OEM/ODM pack configuration, nickel strip or tab planning, insulation, labeling, connector matching, sample development, and stable wholesale supply for batch projects.
Why Choose VTCBATT?
VTCBATT not only focuses on customized design and excellent service to meet the diverse demands of different customers, but also devotes itself to precise and standardized manufacturing in every process to ensure the highest-quality batteries. Meanwhile, VTCBATT will provide comprehensive support from pre-sales to after-sales, focusing on customers’ feedback to establish long-term and win-win cooperation. VTCBATT professional sales and technical engineer teams will be your best custom battery experts to assist with reliable and fast services at any time.
From the raw materials mixing to the cell test, VTCBATT adopts an automatic manufacturing process to maximize production efficiency and enhance the batteries quality, safety, and reliability. The entire manufacturing process is monitored and 100% tested before flowing to the next procedure to ensure zero defects before delivery.
Over the past 20 years, VTCBATT has built strong partnerships with customers in more than 50 countries worldwide. With reliable quality, responsive service, and tailored battery solutions, we have earned the trust of our clients—many of whom have maintained long-term cooperation and lasting friendships with us for over a decade. Together, we continue to grow and move forward toward a brighter future.
Application for ICR18650 Li-ion cell with button top
For application projects, the VTC-ICR18650-2600H Li-ion cell fits industrial handheld terminals, barcode scanners, portable test instruments, compact monitoring terminals, emergency lighting modules, wireless communication units, smart security devices, and custom rechargeable battery packs. Its 18.5mm by 67.5mm cylindrical format helps engineers integrate the cell into standard 18650 holders, welded pack structures, or compact enclosures, while the 3.7V nominal voltage and 2600mAh typical capacity support common single-cell and series/parallel pack layouts. VTCBATT can help match connector requirements, wire length, insulation materials, nickel strip layout, pack labeling, NTC or protection circuit needs when required by the application, and sample testing before batch production. Factory-direct battery wholesale support is available for distributors, brand owners, and OEM equipment manufacturers building repeatable rechargeable power solutions.
VTC-ICR18650-2600H Product Specification
High Energy and Power Cylindrical Cell
This HTML summarizes the main contents of the source PDF and preserves the key report tables, test conditions, requirements, cautions, and outline dimension information. Symbols from the PDF font encoding have been normalized for readability.
Document Revision History
| Edition | Modified Content | Draftsman | Reviser | Date |
|---|---|---|---|---|
| A0 | / | Siqi Zhao | / | 2017-1-28 |
| A1 | Modify the format; add RH control | / | Lydiyar Li | 2018-08-15 |
| A2 | Modify the minimum capacity; modify specific electricity current for rate capability | / | Lydiyar Li | 2018-11-16 |
| A3 | Add 5.1.2 | / | Lydiyar Li | 2019-01-18 |
| A4 | Add the revision history | / | Lydiyar Li | 2019-04-18 |
| B0 | Unified security testing standards | / | Lydiyar Li | 2019-08-26 |
| B1 | Modify the format; modify the internal impedance section 3.3 | / | Siqi Zhao | 2020-4-30 |
1. Scope
This specification describes technical parameters and test standards for the lithium-ion rechargeable cell ICR18650 2600mAh, manufactured and supplied by VTC Power Co., Ltd. These parameters and standards mainly refer to GB 31241-2014, UL1642, IEC62133 and UN38.3.
2. Product Specification
| Item | Value |
|---|---|
| Type | Cylindrical Lithium-ion Rechargeable Cell |
| Model | VTC-ICR18650-2600H |
3. Basic Characteristics
| Item | Specification | Condition / Note |
|---|---|---|
| Capacity | Typical: 2600mAh Minimum: 2500mAh | Standard charge/discharge, refer to 4.1 and 4.2 |
| Nominal Voltage | 3.7V | |
| Internal Impedance | ≤40mΩ | AC 1kHz |
| Standard Charge | 0.5C (1250mA) 4.2V 0.05C (125mA) | Constant current Constant voltage End condition / cut off |
| Max. Continuous Charge Current | 1C (2600mA) | Constant current; not recommended for cycle life |
| Max. Continuous Discharge Current | 3C (7500mA) | Cut-off temperature: 70°C |
| Charge Cut-off Voltage | 4.2V | |
| Discharge Cut-off Voltage | 2.75V | |
| Weight | 46.0 ± 1.5g | |
| Max. Dimension | Diameter (Φ): 18.5mm Height (H): 67.5mm |
Operating Temperature – Charge
| Temperature | Max Continuous Charge Rate |
|---|---|
| 0°C ≤ T ≤ 15°C | 0.2C (500mA) |
| 15°C < T ≤ 30°C | 0.5C (1250mA) |
| 30°C < T ≤ 50°C | 1C (2500mA) |
Operating Temperature – Discharge
| Temperature | Max Continuous Discharge Rate |
|---|---|
| -20°C ≤ T ≤ 0°C | 0.2C (500mA) |
| 0°C < T ≤ 20°C | 1C (2500mA) |
| 20°C < T ≤ 45°C | 3C (7500mA) |
| 45°C < T ≤ 60°C | 1C (2500mA) |
Storage Temperature
| Duration | Temperature | Condition |
|---|---|---|
| One month | -20°C ~ 50°C | Relative humidity ≤80% |
| Three months | -20°C ~ 45°C | Relative humidity ≤80% |
| One year | -20°C ~ 25°C | Relative humidity ≤75% |
Overheat protection: stop discharging when the cell surface temperature rises to 70°C.
4. Standard Conditions for Test
Unless otherwise stated, electrical characteristics are obtained at ambient temperature 25 ± 2°C and relative humidity ≤75%.
Unless otherwise stated, safety tests are conducted at ambient temperature 20 ± 5°C and relative humidity ≤75%.
| Test Item | Condition |
|---|---|
| Standard Charge | 0.5C (1250mA), CC-CV to 4.2V, 0.05C (125mA) cut off |
| Standard Discharge | 0.2C (500mA), CC to 2.75V |
5. Characteristics
5.1 Electrical Characteristics
| Items | Test Procedure | Requirements |
|---|---|---|
| 5.1.1 Nominal Voltage | Charge as described in 4.1, discharge as described in 4.2, and calculate the average working voltage during discharge. | 3.6V |
| 5.1.2 Nominal Capacity | Charge as described in 4.1, rest less than 1h, and discharge as described in 4.2. | ≥2500mAh |
| 5.1.3 Cycle Life 1 | Charge as described in 4.1, rest for 10min; discharge with 1C (2500mA) to 2.75V, rest for 10min. Repeat until discharge capacity in 2 successive cycles is lower than 80% of the initial capacity. | ≥600 cycles |
| 5.1.4 Cycle Life 2 | Charge with 0.5C (1250mA) constant current and 4.1V constant voltage, cut off at 0.05C (125mA), rest for 10min; discharge with 1C (2500mA) to 2.75V, rest for 10min. Repeat until discharge capacity in 2 successive cycles is lower than 70% of the initial capacity. | ≥1000 cycles |
| 5.1.5 Rate Performance | Charge as described in 4.1, rest for 10min, then discharge with different constant currents to 2.75V. | 0.5C = 100% 1C ≥96% 2C ≥94% 3C ≥90% |
| 5.1.6 Temperature Dependence of Discharge Capacity | Charge as described in 4.1, discharge to 2.75V with 1C, and record initial capacity. Charge again, rest 5h at the target temperature (24h at -20°C), discharge to 2.75V with 1C (2.5V at -20°C), and calculate the capacity ratio. | -20°C ≥70% 0°C ≥80% 25°C = 100% 55°C ≥95% |
| 5.1.7 Capacity Retention at Room Temperature | Charge and discharge as described in 4.1 and 4.2, record initial capacity; charge, store 30 days, discharge, calculate retention ratio; then charge/discharge again and calculate recovery ratio. | Retention ratio ≥90% Recovery ratio ≥95% |
| 5.1.8 Capacity Retention at High Temperature | Charge and discharge as described in 4.1 and 4.2, record initial capacity; charge, store for 7 days at 55 ± 2°C, rest 5h at 25 ± 2°C, discharge and calculate retention ratio; then charge/discharge again and calculate recovery ratio. | Retention ratio ≥85% Recovery ratio ≥93% |
| 5.1.9 Storage | Manufactured within 3 months. Charge and discharge as described in 4.1 and 4.2, record initial capacity; charge as described in 4.1 and discharge for 30min with 0.5C; store 28 days at 45 ± 2°C and rest for 5h at 25 ± 2°C; charge and discharge as described in 4.1 and 4.2 and record discharge capacity. | Discharge capacity after storage / initial capacity ≥80% |
5.2 Electrical Tests
| Items | Test Procedure | Requirements |
|---|---|---|
| 5.2.1 Short Circuit at 20 ± 5°C | Fully charge the sample as described in 4.1 and short-circuit positive and negative terminals with a circuit load resistance of 80 ± 20mΩ at 20 ± 5°C. Measure case temperature during test. Continue for 24h or until case temperature declines by 20% from maximum. | No fire, no explosion, maximum surface temperature ≤150°C |
| 5.2.2 Short Circuit at High Temperature | Fully charge the sample, store at 55 ± 5°C for 1h ~ 4h, then short-circuit positive and negative terminals with a circuit load resistance of 80 ± 20mΩ. Continue for 24h or until case temperature declines by 20% from maximum. | No fire, no explosion, maximum surface temperature ≤150°C |
| 5.2.3 Abnormal Charge | Discharge as described in 4.2, then charge to 4.6V with the greater current between 3C and three times the manufacturer-recommended charging current. Continue until charging time reaches 7h or case temperature declines by 20% from maximum. | No fire, no explosion |
| 5.2.4 Forced-Discharge | Discharge as described in 4.2, then force discharge with reverse current of 1C for 90min. | No fire, no explosion |
5.3 Mechanical Tests
| Items | Test Procedure | Requirements |
|---|---|---|
| 5.3.1 Vibration | Fully charge and secure the sample to the vibration platform. Use sinusoidal logarithmic scan from 7Hz to 200Hz: 7Hz to 18Hz at 1gn peak acceleration, maintain 0.8mm amplitude to about 50Hz, then maintain 8gn peak acceleration to 200Hz and return to 7Hz. Each cycle is 15min. Test axial and radial directions, repeated 12 times for 3h in each direction. | No fire, no explosion, and no leakage |
| 5.3.2 Drop | Fully charge the sample and drop it from 1m onto a flat concrete floor. Drop positive and negative electrode sides once each and the cylindrical surface twice. Each cell is dropped four times. | No fire, no explosion |
5.4 Environmental Tests
| Items | Test Procedure | Requirements |
|---|---|---|
| 5.4.1 Temperature Cycling | Fully charge the sample and store in a test chamber. Raise chamber to 72 ± 2°C for at least 6h, reduce to -40 ± 2°C for at least 6h, repeat 10 times. The interval between two test temperatures should be less than 30min. | No fire, no explosion, and no leakage |
| 5.4.2 Low Pressure | Fully charge the sample and store for 6h at absolute pressure 11.6kPa (1.68psi) and temperature 20 ± 5°C, then observe for 1h. | No fire, no explosion, and no leakage |
| 5.4.3 Heating | Fully charge and place in a gravity or circulating air convection oven at 20 ± 5°C. Raise oven temperature at 5 ± 2°C/min to 130 ± 2°C and keep for 30min. | No fire, no explosion |
| 5.4.4 Projectile Test | After fully charged, place the cell on a platform with steel wire screen in the center and surround it with an eight-sided aluminum wire cage made of 0.25mm aluminum wire with 16-18 wires per inch in each direction. Heat until the cell explodes, ignites and burns out, or reaches 30min without burning or explosion. | No part of an exploding cell or battery shall penetrate the wire screen |
6. Outline Dimensions
Fig. 1 Outline Dimensions of VTC ICR18650-2600H (with tube)
| No. | Items | Value |
|---|---|---|
| 1 | Diameter (Φ1) | 18.5mm MAX |
| 2 | Diameter (Φ2) | 6.0mm MAX |
| 3 | Height (H) | 67.5mm MAX |
7. Cautions
Read the specification carefully before testing or using the cells. Improper handling of Li-ion cells may lead to efficiency loss, heating, electrolyte leakage, ignition, or explosion.
7.1 Caution in Use
- Abnormal operations such as overcharge (voltage > 4.2V), over-discharge (voltage < 2.75V), and overcurrent charge/discharge should be prohibited. Avoid static electricity and poor sealing environments where water or dust may enter.
- Charging with current above 0.5C, use in high/low temperature, vibration, or humid environments, and matching unstable cells will reduce cycle life.
- Do not use the cell in high-frequency microwave or ultrasonic environments. In series/parallel use, apply electromagnetic insulation to high-voltage wire where needed.
- Avoid overlap or contact between positive and negative terminal wires to reduce short-circuit risk.
- Charge and discharge strictly according to this specification to protect cycle life and safety.
- When batteries are assembled into a module, use cells with the same capacity, internal resistance, batch, and charged state. Pack assembly should follow the technical agreement. Temperature difference inside the pack should be less than 5°C during operation.
- Do not charge the battery below 0°C. Store it above 0°C for the recommended time before charging.
| Outside Temperature | Recommended Store Time Before Charging |
|---|---|
| -5°C ≤ T ≤ 0°C | 2h |
| -10°C ≤ T ≤ -5°C | 5h |
| -15°C ≤ T ≤ -10°C | 8h |
| -20°C ≤ T ≤ -15°C | 10h |
7.2 Safety Caution
- Keep batteries away from babies and children. In emergencies such as swallowing, scalding, or explosion, seek medical treatment immediately.
- Use professional Li-ion battery test equipment for charging/discharging. Do not use ordinary CC/CV power chargers without current or voltage limits.
- Avoid reversing positive and negative terminals during charging, discharging, or assembly.
- Do not solder directly to the battery. Do not disassemble the battery.
- Do not place batteries with metal objects such as necklaces, hairpins, coins, or screws. Do not store without proper isolation or connect electrodes directly with conductive materials.
- Do not hammer, throw, trample, wash, or place the battery in high-pressure containers.
- Keep away from fire, heaters, direct sunlight, and locations above 60°C.
- Do not wet the battery or throw it into water. Store unused batteries in a dry, relatively cool environment.
- If the battery becomes abnormally hot, emits odor, changes color, deforms, or shows other abnormalities during use, testing, or storage, stop immediately, isolate it, and keep away.
- If electrolyte enters eyes, rinse with clean water and seek medical attention if problems remain. If electrolyte contacts skin or clothing, wash with clean water immediately.
8. Packing
Cells need to be at half-charged state when packed. Packing boxes should show product name, type, nominal voltage, quantity, gross weight, date, capacity, and impedance.
9. Transportation
During transportation, do not subject cells or boxes to violent shaking, bumps, rain, or direct sunlight. Cells can be transported by truck, train, ship, airplane, etc.
10. Long-term Storage
When delivered, cells are charged to 3.60V ~ 3.80V. Storing cells at or above 80% SOC for a long time will lead to capacity and cycle life loss. Keep cells in use within 90 days when capacity is more than 80%.
Cells may have lower capacity than expected because of self-discharge when delivered at 30% SOC. Do not use or store cells when voltage is less than 2.75V.
11. Warranty
The warranty period is 12 months from the ex-factory date. Warranty is void if cells are used in ways that deviate from this specification.
12. Exclusion of Liability
The company is not liable for problems arising from non-compliance with this specification, or from the use of electrical circuits, battery packs, and chargers. The company does not guarantee defective batteries caused by customers during battery assembly after shipment.
13. Statements
The information in this specification is subject to change without prior notice. For applications not described here, consult VTC Power Co., Ltd.
