CYLINDRICAL LiFePO₄ CELL
F26650-25B
3.2V 2.5Ah 8Wh
The F26650-25B is a high-power cylindrical LiFePO₄ battery cell engineered for applications requiring high discharge rates, fast charging, and long cycle life. With up to 80C pulse discharge, high-rate continuous discharge capability, and charging up to 7C, it is designed for demanding battery pack applications where power and durability matter.
F26650-25B Specifications
| Specification | Value |
|---|---|
| Part Number | F26650-25B |
| Chemistry | LiFePO₄ (LFP) |
| Cell Type | Cylindrical 26650 |
| Nominal Voltage | 3.2V |
| Typical Capacity (1C) | 2500mAh |
| Diameter | 26.3 ± 0.2mm |
| Height | 65.3 ± 0.2mm |
| Weight | 84 ± 1.5g |
| Impedance | ≤6mΩ |
| Energy Density | 98Wh/kg |
| Standard Charge | 2500mA, 3.65V, 50mA cut-off (CC-CV) |
| Standard Discharge | 2500mA, 2.0V cut-off (CC) |
| High-Rate Charge | Up to 7C |
| Pulse Discharge | Up to 80C / 1 sec |
| Working Temperature | -40°C to +60°C |
| Charge Temperature | -20°C to +60°C |
| Discharge Temperature | -40°C to +60°C |
Built for High-Power Applications
High-Power Discharge
Supports up to 80C pulse discharge for 1 second and high-rate continuous discharge for applications with demanding power requirements.
Fast Charging
Supports high-rate charging up to 7C, with documented fast-charge performance reaching 94% or greater efficiency in 8 minutes.
Low Impedance
Cell impedance of ≤6mΩ supports high current delivery while helping reduce internal power losses and temperature rise.
Wide Temperature Range
Designed for operation across demanding environments, with discharge from -40°C to +60°C and charging from -20°C to +60°C.
Safety-Focused Design
Features CID overcharge protection and pressure-release venting, with penetration testing passed as part of its documented safety performance.
Long High-Rate Cycle Life
Designed for demanding cycling, with documented testing showing 2,000+ high-rate cycles under specified test conditions.
Graphs
Cycle Life
Capacity Retention
- 100 Cycles
- 102.5%
- 500 Cycles
- 100.8%
- 1,000 Cycles
- 98.5%
- 1,500 Cycles
- 95.9%
- 2,000 Cycles
- 93.3%
Rate Discharge Curve1
Test Method
- Charge
- CC/CV 1C × 3.65V × 0.02C cut-off, 25°C
- Discharge
- CC 0.2/0.5/1/2/3/5/10/15/20/30 C × 2.0V cut-off, 25°C
From Cell to Complete Battery Pack
Need More Than a Battery Cell?
PHD Energy can integrate the F26650-25B into a custom LiFePO₄ battery pack engineered around your application's high-power, charging, electrical, mechanical, environmental, and certification requirements.
- CELL
- MODULE
- BMS
- BATTERY PACK
APPLICATION
- Custom Pack Design
- BMS Integration
- Prototyping
- Testing & Validation
- Certification Support
- Scalable Manufacturing
F26650-25B FAQ
What is the F26650-25B?
The F26650-25B is a 3.2V 2.5Ah cylindrical LiFePO₄ battery cell designed for high-power, high-rate charging and demanding battery pack applications.
What is the discharge capability of the F26650-25B?
The F26650-25B supports high-rate continuous discharge and pulse discharge up to 80C for 1 second, making it suitable for applications with short-duration high-power demands.
How fast can the F26650-25B charge?
The cell supports high-rate charging up to 7C. PHD Energy's documented testing reports fast-charging efficiency of 94% or greater in 8 minutes under the specified test conditions.
What temperature range can the F26650-25B operate in?
The F26650-25B supports discharge from -40°C to +60°C and charging from -20°C to +60°C.
What safety features does the F26650-25B include?
The cell incorporates CID overcharge protection and pressure-release venting and has passed penetration testing as part of its documented safety testing.
What is the cycle life of the F26650-25B?
Cycle life depends on operating and test conditions. PHD Energy's high-rate cycle testing documents more than 2,000 cycles, while the published cycle-life data shows 93.3% capacity retention at 2,000 cycles under the associated test conditions.
Can PHD Energy build a custom battery pack using the F26650-25B?
Yes. PHD Energy provides custom battery pack development including cell integration, BMS design and integration, prototyping, testing, certification support, and scalable manufacturing.