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High-Capacity 7.4V 4400mAh 18650 Battery Pack 18650-2P2S
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7.4V 4400mAh 18650-2P2S Li-ion Battery Pack
The Ufine 18650-2P2S lithium-ion battery pack provides 7.4V nominal voltage, 4400mAh capacity, and 32.56Wh nominal energy. Its 2S2P configuration combines two series groups with parallel cells to increase both pack voltage and capacity. It is designed for devices that need a rechargeable 7.4V power source with higher energy storage.
Performance Characteristics of 7.4V 4400mAh 18650 Battery Pack
The 18650-2P2S pack has defined current, cycle-life, temperature, and storage limits. These values help engineers check whether the pack matches the device power system.
- Charge & Discharge
- Cycle Life
- Temperature Range
- Storage Conditions
Defined Charge and Discharge Current
The 18650-2P2S pack has a standard charge current of 880mA. Its maximum charge and discharge current is 4400mA.
- Standard charge current: 880mA
- Standard discharge current: 4400mA
- Maximum charge current: 4400mA
- Maximum discharge current: 4400mA
- Pack discharge cut-off voltage: 5.5V
Cycle Life and Capacity Retention
The battery pack is designed for repeated charging and discharging. Its specified capacity retention remains ≥80% after 500 cycles.
- After 100 cycles: ≥92% capacity retention
- After 300 cycles: ≥88% capacity retention
- After 500 cycles: ≥80% capacity retention
Defined Operating Temperature Range
Charging and discharging have different temperature limits. Therefore, both ranges should be checked before the battery pack is used in a device.
- Charging temperature: 0°C to 45°C
- Discharging temperature: -20°C to 60°C
- Use outside these limits requires separate engineering evaluation
Storage Temperature and Duration
The recommended storage temperature depends on storage time. For longer storage periods, a lower temperature range is specified.
- Up to 1 year: -20°C to +25°C
- Up to 3 months: -20°C to +45°C
- Up to 1 month: -20°C to +60°C
18650-2P2S Battery Pack Engineering Highlights
The 18650-2P2S uses a 2S2P cell arrangement to provide 7.4V nominal voltage and 4400mAh capacity. This configuration supports devices that need more energy than a basic two-cell series pack.
2S2P Design for Higher Voltage and Capacity
Two cell groups are connected in series to create the 7.4V pack voltage. Within each group, cells are connected in parallel to increase capacity to 4400mAh. As a result, the pack provides 32.56Wh of nominal energy.
- Nominal voltage and capacity: 7.4V / 4400mAh
- Nominal energy: 32.56Wh
- Configuration: 2S2P
- Approx. weight: 200g
- Standard charge current: 880mA
- Maximum charge current: 4400mA
- Maximum discharge current: 4400mA
- Internal resistance: <150mΩ
- Maximum pack charge voltage: 8.4V
- PCM protection: Yes
Manufacturing Controls for the 18650-2P2S Battery Pack
The 18650-2P2S pack follows defined production and inspection controls. These checks cover cell matching, pack assembly, electrical connections, and final performance.
View Production Details 
Standard 18650-2P2S Pack vs Custom Options
The standard pack provides a defined 7.4V and 4400mAh configuration. However, selected pack components can be adjusted for OEM device integration.
Standard 18650-2P2S
- 7.4V nominal voltage
- 4400mAh nominal capacity
- 32.56Wh nominal energy
- 2S2P configuration
- Approx. weight: 200g
- 880mA standard charge current
- 4400mA standard discharge current
- 4400mA maximum charge current
- 4400mA maximum discharge current
- 8.4V maximum charge voltage
- 5.5V discharge cut-off voltage
- Internal resistance: <150mΩ
- Charging temperature: 0°C to 45°C
- Discharging temperature: -20°C to 60°C
- PCM protection included
- NTC: No
Custom Options
- Connector type and mating interface
- Wire length, gauge, and polarity
- PCM and protection-circuit configuration
- Optional NTC or temperature sensing
- Pack layout according to available device space
- Other electrical or mechanical changes subject to engineering evaluation
18650 Battery Pack Customization
Ufine can adjust selected pack components to match the device interface, installation space, wiring, and protection requirements.
- Connector Options: JST / Molex / Hirose / TE / etc.
- Custom Wire Length, Gauge & Polarity
- PCM and Protection Circuit Configuration
- Optional NTC / Temperature Sensing
- Pack Layout Changes Subject to Engineering Evaluation
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01Confirm available battery space and required pack layout
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02Define voltage, capacity, current, and runtime needs
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03Confirm charging and operating temperature requirements
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04Match connector, wire length, gauge, and polarity
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05Confirm PCM, NTC, and final pack configuration
Battery Specification
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1. Mechanical Characteristics
Cell 18650-2P2S PCM Yes NTC No Weight appr. 200g Configuration 2S2P -
2. Electrical Specification
Capacity 4400mAh Nominal Voltage 7.4V Energy 32.56Wh Internal Resistance less than 150mΩ Max. Charge Voltage 8.4V Discharge Cut Off 5.5V Max. Charge Current 4400mA Max. Discharge Current 4400mA Standard Charge Current 880mA Standard Discharge Current 4400mA Charging Temperature 0℃ to 45℃ Discharging Temperature -20℃ to 60℃ Storage Temp.Range 1 year at -20℃ to +25℃ 3 mos. at -20℃ to +45℃ 1 mo. at -20℃ to +60℃ Cycle life 100 cycles ≥92% 300 cycles ≥88% 500 cycles ≥80% -
3. Cell protection
Overcharge Detection 4.28V ±50mV (80 to 200msec delay, release 4.08V ±50mV) Overdischarge Detection 2.4V ±100mV (40 to 120msec. delay, release 3.0V ±100mV) Overcurrent Detection 2.5A to 4.5A (5 to 10msec. delay) Short protection Yes
The 7.4V 4400mAh 18650 Battery Pack 18650-2P2S from Ufine Battery delivers high-capacity and stable energy for portable electronics, drones, medical instruments, and IoT devices. Its robust 2P2S configuration ensures consistent mid-to-high power output while maintaining a compact form factor.
Explore how this li ion 18650 battery 7.4 v 4400mah can support your projects, extend device runtime, and improve operational reliability.
Part 1. Applications of the 7.4V 4400mAh 18650 Battery Pack
The battery lithium 7.4 v 4400mah is designed to empower devices across multiple sectors:
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Drones and UAVs – Provides stable voltage and extended flight duration for professional and hobbyist use.
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Medical instruments – Keeps portable diagnostic and monitoring equipment operational during critical tasks.
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Portable tools and handheld devices – Ensures reliable energy supply for scanners, meters, and controllers without frequent recharging.
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IoT systems – Fits compact enclosures while supporting continuous sensor operation and wireless communication.
Looking for a battery that matches your device requirements? Consult Ufine Battery for tailored 7.4v 4400mah lithium ion battery solutions.
Part 2. How to maximize the lifespan of your 7.4V 4400mAh lithium battery?
Proper maintenance of your 7.4v 4400mah lithium battery is key to long-term performance:
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Store in a cool, dry environment to prevent capacity degradation and preserve charge cycles.
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Avoid deep discharge by recharging before reaching critically low levels.
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Use manufacturer-recommended chargers to ensure safe and balanced charging of the 2P2S pack.
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Inspect connectors and wiring periodically to maintain consistent power delivery.
Part 3. Environmental and operational advantages of the 7.4v 4400mah battery
The 7.4v 4400mah battery is engineered for both reliability and efficiency in diverse environments:
With low self-discharge, devices can remain standby-ready for extended periods, reducing energy waste. Its durable design and high-quality 18650 cells minimize the need for frequent replacements, aligning with sustainable practices.
Part 4. Insights from users of the 18650 battery 7.4 v 4400mah
Professionals across industries trust the 18650 battery 7.4 v for uninterrupted performance:
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Drone operators report consistent mid-power output and reliable battery life, even in extended missions.
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Medical technicians appreciate the pack's stable voltage for critical monitoring devices.
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Field engineers rely on its compact design and 2P2S configuration to power handheld instruments in challenging conditions.
Part 5. Customization options with Ufine 7.4V 4400mAh lithium ion battery
Ufine Battery provides flexibility for 7.4 v 4400mah lithium battery projects:
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Custom pack sizes and shapes to integrate seamlessly with your device enclosure.
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Adjustable voltage and capacity to align precisely with operational needs.
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Connector selection for rapid integration into drones, tools, or IoT systems.
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Environmental adaptations for high and low temperature performance, ensuring reliability in extreme conditions.
Begin your project today by requesting a consultation for your 7.4v 4400mah battery pack and achieve consistent, high-capacity performance.
FAQs
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What makes the 7.4V 4400mAh 18650-2P2S battery pack different from standard 18650 single cells?
The 18650-2P2S pack combines four 18650 cells in a 2-series, 2-parallel configuration, providing double the voltage and double the capacity of a single 18650 cell. This ensures stable 7.4V output and extended runtime for devices requiring higher power. -
Can this 7.4V 4400mAh battery replace other 7.4V lithium-ion battery packs?
Yes, as long as your device supports a 7.4V input and the pack dimensions fit your enclosure. The connector type should also be compatible to ensure safe and reliable operation. -
How long does it take to charge the 7.4V 4400mAh 18650 battery pack fully?
Using a standard 7.4V compatible charger, it typically takes 4–5 hours for a full charge. Fast charging may be possible with appropriate chargers, but it is recommended to follow Ufine's guidelines to maintain battery health and longevity. -
What types of devices benefit most from this 7.4V 4400mAh battery pack?
This battery pack is ideal for drones, handheld medical instruments, portable power tools, robotics, and IoT devices that require a compact pack with high-capacity and stable 7.4V output over long operating periods. -
Can the 7.4V 4400mAh 18650 battery pack be customized for specific project needs?
Absolutely. Ufine offers OEM/ODM customization, including tailored pack dimensions, connector types, wire lengths, PCM/protection integration, and cell arrangement, allowing you to optimize the pack for your device or prototype. -
What safety features are included in this 18650-2P2S battery pack?
The pack includes integrated PCM protection to prevent overcharge, over-discharge, and short circuits. High-quality cells and balanced wiring ensure thermal stability and reliable performance under standard operating conditions.
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