The IFR26650-33B is a high-reliability LiFePO4 cylindrical cell engineered for demanding applications requiring strong low-temperature performance and a wide operational temperature range. It provides stable output, high discharge capability, and long cycle life, making it ideal for systems requiring a dependable Low Temperature Battery or Wide Temperature Battery solution.
Excellent low-temperature performance with reliable operation even at -20°C.
Long service life with more than 2000 deep cycles.
High discharge rate capability suitable for power-intensive devices.
Naturally safe LiFePO4 chemistry with strong thermal and structural stability.
Wide temperature adaptability for diverse environmental conditions.
| Parameter | Specification | Condition / Note |
|---|---|---|
| Model | IFR26650-33B | — |
| Nominal Voltage | 3.2 V | — |
| Typical Capacity | 3300 mAh | 2.0V–3.65V, 0.5C discharge |
| Minimum Capacity | 3270 mAh | 2.0V–3.65V, 0.5C discharge |
| AC Impedance (1kHz) | ≤ 15 mΩ | At 50% SOC |
| Standard Charge Current | 3300 mA (1C) | 25±2°C |
| Max. Charge Current (Continuous) | 16500 mA (5C) | 25°C, not for cycle use |
| Charge Voltage | 3.65 V max | CC-CV |
| Standard Discharge Current | 3300 mA (1C) | 25°C |
| Max. Continuous Discharge Current | 9900 mA (3C) | 25°C, not for cycle use |
| Max. Pulse Discharge Current | 16500 mA (5C) | ≤60s, surface temp ≤70°C |
| Discharge Cut-off Voltage | 2.0 V | — |
| Operating Voltage | 2.0 V – 3.65 V | — |
| Weight | 85.5 ± 2 g | — |
| Storage Humidity | < 50% RH | — |
| Function | Temperature Range | Note |
|---|---|---|
| Charge | 0°C ~ 60°C | Refer to charge rate table |
| Discharge | -20°C ~ 60°C | — |
| Storage | -20°C ~ 60°C | Recommended ~50% SOC |
| Low-Temperature Capacity | 0°C ≥ 70%; -10°C ≥ 60%; -20°C ≥ 40% | After 4h soak, discharge 1C to 2.0V |
| Test Condition | Result | End-of-Life Criteria |
|---|---|---|
| 25°C ± 2°C, 100% DOD, 3C charge/discharge, 30-min rest | ≥ 2000 cycles | Capacity ≤ 80% of initial |
A graphical curve illustrating voltage vs. capacity at 0.2C, 1C, and 3C, including performance at 0°C, -10°C, and -20°C, should be inserted here. This supports users evaluating real-world performance for Low Temperature Lithium Battery applications.
All safety and performance tests comply with GB/T 31241-2022.
Cylindrical steel casing for structural durability.
Stable LiFePO4 chemistry optimized for high-drain systems.
Suitable for demanding Low Temperature Battery and Wide Temperature Battery applications requiring long-term reliability.
Electric Vehicles (EVs)
Power Tools
Portable Medical Devices
Uninterruptible Power Systems (UPS)
Consumer Electronics
Do not immerse the cell in water or liquids.
Avoid heat sources and direct sunlight.
Charge only with a designated Li-ion charger.
Prevent short circuits.
Do not crush, disassemble, or incinerate.
For 30–90 days: store at ~50% SOC.
For >90 days: maintain ~50% SOC and perform one full charge/discharge every 90 days.
Standard warranty is one year from shipment or as contractually agreed. Warranty applies only when the product is used with a functional BMS and operated within all specified conditions.
Our products are sold all over the world, you can rest assured.
