3.7 V 2000mAh 18650 Battery 18650-3C
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High-Rate Power: 3.7V 2000mAh 18650 Battery
Need a reliable power source for high-drain applications? Ufine’s 3.7V 2000mAh 18650-3C Lithium Battery is built with high-rate capability and excellent stability. With a nominal voltage of 3.7V, capacity of 2000mAh, and continuous discharge rate of 3C, this Li-ion 18650 battery ensures consistent output for devices requiring fast bursts of energy. Perfect for power tools, portable medical devices, e-bikes, drones, and industrial equipment where reliability and endurance matter.
Performance Test Curves of 3.7V 2000mAh 18650 Battery
Explore discharge rate, cycle life, temperature adaptability, and self-discharge performance of this high-rate 18650 Li-ion cell.
- Discharge Rate
- Cycle Life
- Temperature Range
- Self-Discharge
High-Rate Discharge Performance
The 3.7V 2000mAh 18650 battery supports up to 3C continuous discharge, making it suitable for devices requiring steady current and peak power bursts.
- Supports 3C continuous discharge
- Peak discharge up to 5C
- Stable voltage output under heavy load
Durable Cycle Life
This Li-ion 18650 battery 2000mAh 3.7V retains over 80% capacity after 500 charge cycles under 1C discharge conditions.
- 500+ cycles at room temperature
- Consistent energy output over long-term use
- Lower degradation for cost efficiency
Wide Temperature Adaptability
This 18650 lithium battery 2000mAh operates between -20°C and 60°C, with custom versions for extreme conditions.
- Standard range: -20°C to 60°C
- Low-temp customization: down to -40°C
- High-temp customization: up to 85°C
Low Self-Discharge
This 18650 3C battery minimizes self-discharge, ensuring reliable standby power and longer storage life.
- Excellent storage capacity retention
- Lower self-discharge at partial SOC
- Remains ready-to-use after long idle periods
Safe High-Rate Performance
The 18650 2000mAh 3C battery balances strong discharge current with stable protection.
Reliable at 3C Discharge
Unlike standard 18650 cells, the 3.7V 2000mAh 18650-3C battery is optimized for high current output. Integrated safety mechanisms maintain low heat and protect against risks during continuous 3C discharge.
- Stable thermal management under 3C load
- Overcharge & over-discharge protection
- Short circuit safeguard for high-current devices
- Enhanced separator reduces internal heating
Quality You Can Trust
From material sourcing to final inspection, Ufine ensures every 3.7V 2000mAh 18650-3C cell is optimized for high-rate performance and dependable longevity.
View Production Details 
Other Battery VS Ufine Battery
Compare Ufine's high-rate 18650 battery with generic market alternatives.
Our Battery
- 3C Continuous Discharge, Peak 5C
- 2000mAh Capacity with Stable 3.7V Output
- Custom Samples Ready in 3 Days
- Complies with International Safety Standards
- Dedicated Customer Support
- Low Self-Discharge, Reliable Storage
- Flexible Customization for Size & Connectors
- Operating Temp: -20°C ~ 60°C (Customizable)
Other Battery
- Generic design, limited customization
- Slower sample delivery
- Basic quality control, higher risks
- Limited customer support
Custom 18650 Battery Solutions
Ufine offers tailored 3.7V 2000mAh 18650 lithium battery packs for diverse applications.
- Custom Capacities & Configurations
- Different Connectors (JST, Molex, etc.)
- Protective Circuit Integration
- Low & High Temp Versions
- Flexible Assembly Options
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01Understand customer device requirements
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02Design cell and safety configuration
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03Prototype and validate performance
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04Mass production with QC assurance
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05After-sales technical support
Battery Specification
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1. Mechanical Characteristics
Cell 18650-3C PCM No NTC No Weight appr. 46g Configuration 1S1P -
2. Electrical Specification
Capacity 2000mAh Nominal Voltage 3.7V Energy 7.4Wh Internal Resistance less than 25mΩ Max. Charge Voltage 4.2V Discharge Cut Off 2.75V Max. Charge Current 2000mA Max. Discharge Current 6000mA Standard Charge Current 400mA Standard Discharge Current 400mA 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 No Overdischarge Detection No Overcurrent Detection No Short protection No
The 3.7V 2000mAh 18650 Battery (18650-3C) from Ufine Battery is engineered to outperform standard 18650 cells. Unlike regular Li-ion cells that support low-rate discharge, this 18650 3C battery is built for high-current applications, delivering reliable 6A continuous output without compromising safety.
This article explores how the li-ion 18650 battery 2000mAh 3.7V stands apart from common cells, its advantages, and where it is most effectively used.
Part 1. Difference between 18650 3C battery and standard 18650
The 3C lithium battery is designed with upgraded materials and structures that provide performance benefits over conventional 18650 cells:
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Higher discharge capability – Delivers up to 3C (6A continuous), while standard 18650 batteries usually support only 0.5C–1C discharge.
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Stable thermal control – Enhanced separator materials minimize heat build-up under heavy load, unlike ordinary cells that risk overheating.
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Safer structure – Built-in protections against overcharge, over-discharge, and short circuits make it safer for high-power devices.
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Durable cycle life – Maintains reliable capacity across repeated cycles, even under higher current demands.
Part 2. Applications of 3.7V 2000mAh lithium battery 18650
Because of its high-rate design, the 18650 battery 3.7V 2000mAh is widely used in:
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Power tools – Provides consistent torque and runtime without overheating.
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Medical devices – Ensures steady performance for portable monitors and diagnostic instruments.
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E-mobility – Suitable for e-bikes, scooters, and light EVs requiring higher discharge power.
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High-performance flashlights – Supports long-lasting brightness under continuous use.
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Backup systems – Delivers reliable power for emergency lighting and small UPS units.
Part 3. Usage insights for 18650 2000mAh 3.7V battery
To maximize the performance of your 18650 battery 2000mAh 3.7V:
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Use a certified Li-ion charger to maintain long-term health.
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Recharge before deep discharge to preserve capacity.
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Store between 20–25°C in dry conditions for stability.
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Pair with high-quality protection circuits for demanding devices.
Part 4. Why choose Ufine’s 18650 3C lithium battery?
Ufine’s 3.7V 2000mAh 18650 battery is not just another cell—it is tailored for applications where standard 18650 batteries fall short. With optimized materials, advanced manufacturing, and rigorous testing, this cell ensures reliable high-rate performance and long service life.
Looking for a customized 18650 3C battery pack? Reach out to Ufine Battery to explore tailored solutions for your project.
FAQs
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What does “3C” mean in a 18650 3C battery?
“3C” refers to the maximum continuous discharge rate of the battery. For a 3.7V 2000mAh 18650 battery, 3C means it can safely provide up to 6A of continuous current, making it suitable for high-drain devices compared to standard 18650 cells. -
Is the 2000mAh capacity enough for my application?
Yes, the li-ion 18650 battery 2000mAh 3.7V balances compact size with stable output. It works well for flashlights, portable tools, and medical devices where both portability and reliable runtime are required. -
Can I use this 18650 battery 3.7V 2000mAh in place of any 18650 cell?
It depends on the device requirements. While the dimensions match standard 18650 cells, the 18650 3C lithium battery is designed for higher discharge loads. Always check voltage, capacity, and current draw before replacement. -
How should I charge the 18650 battery 2000mAh 3.7V safely?
Use a certified Li-ion charger with proper cutoff voltage (4.2V). Avoid overcharging and deep discharging to extend lifespan. Ufine recommends following device specifications for charging current to protect both the battery and the device. -
Does Ufine offer customization for this 3C lithium battery?
Yes, Ufine provides OEM/ODM services for the 3.7V 2000mAh lithium battery 18650. Options include customized pack design, connectors, protection circuits, and performance tuning for specific applications.
Can lithium batteries be customized for specific applications?
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