3.2V 26650 4000mAh LiFePO4 Battery Cell
3.2V 26650 4000mAh LiFePO4 Battery Cell – High Power, Long Life & Customizable
The 3.2V 26650 4000mAh LiFePO4 battery cell offers exceptional cycle life of over 4,000 cycles, making it a perfect choice for solar energy storage, street lighting, and electric mobility. Built with high-safety LiFePO4 chemistry, it has an ultra-low risk of fire or explosion, while supporting up to 5C (20A) discharge with low internal resistance — ideal for building high-performance power battery packs. This cell is fully customizable in size, voltage, capacity, terminals, and OEM branding, allowing flexible assembly into various battery configurations.
26650 Rechargeable Battery LiFePo4 3.2V 4000mAh Product Specification
Model: 26650 Batteries
Rated Capacity: 4000mAh
Energy: 12.8Wh
Energy Density: 164.1Wh/KG
Minimum Capacity: 4000mAh
Rated Voltage: 3.2V
Discharge Cut-off Voltage: 2.5V
Charge Cut-off Voltage: 3.65V
Cycle Life: More than 4000 cycles
Dimensions: Φ26*65mm
Weight: 78g
Internal Resistance: Less than 12mΩ
Standard Discharge Current: 0.2C (800mA)
Standard Charge Current: 0.2C (800mA)
Max Continuous Discharge Rate: 5C (20A)
Max Continuous Charge Current: 1C (4A)
Charging Temperature: 0 to 45℃;
Discharge Temperature: -20 to 60℃
Storage Temperature:
- -20℃~25℃: 12 months
- -20℃~45℃: 3 months
- -20℃~60 ℃: 1 month
🔋 Key Features
⏳ Ultra-Long Lifespan
Over 4,000 charge cycles for years of service, ensuring stable performance even under frequent deep discharge conditions.
🛡 High Safety LiFePO4 Chemistry
Low thermal runaway risk, safe for indoor & outdoor use, and compliant with international safety standards.
⚡ High Discharge Rate
Supports up to 5C (20A) continuous output, delivering strong power for demanding devices without significant voltage drop.
🔽 Low Internal Resistance
Ideal for high-current applications and power tools, reducing heat generation and improving overall efficiency.
🛠 Fully Customizable
Size, voltage, capacity, OEM branding, charging/discharging terminals, and connector types can be tailored to project needs.
🔗Flexible Pack Assembly
Can be combined into various series/parallel configurations, making it suitable for diverse voltage and capacity requirements.
💡 Applications
☀ Solar Energy Storage Systems
🚦 Solar Street & Garden Lights
🚴 Electric Bicycles & Scooters
🔋 High-Power Battery Packs
⚡ Portable Power Systems
📊 LiFePO4 Cell Size Comparison – 26650 vs 18650 vs 32700
| Feature | 26650 LiFePO4 | 18650 LiFePO4 | 32700 LiFePO4 |
|---|---|---|---|
| Energy Density | Medium | Medium-Low | Medium-High |
| Weight | ~80g | ~45g | ~140g |
| Dimensions (mm) | 26×65 | 18×65 | 32×70 |
| Capacity | 4000mAh | 1500–2000mAh | 6000–7000mAh |
| Applications | Solar storage, EV packs, lighting | Small devices, portable power | Large energy storage, EVs |
| Current Output | High (5C) | Medium (2–3C) | High (3–5C) |
✅ Why Choose Cestpower 26650 Cell for Solar & Power Applications
High Cycle Life: More than 10 years in typical daily cycling conditions.
Versatility: Easy to adapt with different sizes and voltages.
Performance: Low heat generation even at high discharge rates.
Safety: Proven LiFePO4 stability under harsh temperatures and heavy load.
❓ FAQ
Q1: Can this cell be used for high-current applications?
A: Yes, this 26650 4000mah battery cell supports maximum 5C 20A constant discharge current at low heat generation.
Q2: Is it safe for outdoor use in solar lighting?
A: Absolutely — LiFePO4 chemistry offers excellent thermal stability and long lifespan.
Q3: Can I get custom battery packs built from these cells?
A: Yes, Cestpower support OEM and ODM service for voltage, capacity, case, and connector.
Q4: How does the 26650 battery compare to 18650 and 32700 cells?
A: It offers a balance between size, capacity, and high-current capability, making it versatile for many applications.
Q5: What is the storage life of this battery cell?
A: With low self-discharge (<3% per month), it can be stored for 12+ months without significant capacity loss.
Related Battery
3.2V 32700 6000mAh 3C 20A LiFePo4 Battery Cell
