IFR26650-40A
Product Description
Product Features
FAQ
Product Tags
Key Takeaways
- 4,000mAh / 147Wh/kg — the highest energy 26650 cell in the PLB range.
- Standard 26650 format — Ø26.3 ± 0.2 mm × 65.3 ± 0.3 mm and 88 ± 2 g.
- 3C continuous (12A), with 15A for 60 seconds and 20A for 10 seconds.
- ≥2,000 cycles at 100% DOD, ≥3,000 at 80% DOD and ≥5,000 at 50% DOD.
- UL1642 · UL2054 · UL1973 · IEC62133 · UN38.3 · RoHS · REACH compliance, produced under IATF 16949 and ISO 9001 quality systems.
Cell Structure & Build
The IFR26650-40A uses a nickel-plated stainless-steel can with PET shrink film and laser-welded terminals. At 88 ± 2 g and ≤20mΩ it keeps the mechanical and electrical behaviour of the PLB 26650 platform while carrying more active material.
- Nickel-plated steel can + PET film — mechanical protection and insulation
- Laser-welded terminals — low-resistance, robust joints
- 88 ± 2 g — consistent weight for PACK balancing
- Batch-level traceability — from raw material to finished cell
Capacity & Energy Density
At 4,000mAh and 147Wh/kg, the cell reduces the number of cells needed for a given energy target. That means fewer interconnects, a simpler BMS harness and less assembly work in ESS and lighting packs.
- 4.0Ah / 3.2V nominal, 147Wh/kg
- 60% more capacity than a 2,500mAh cell
- Simpler busbar and BMS wiring
- Same 26650 holder and footprint
Discharge & Cycle Life
Continuous discharge is rated at 3C (12A), with 15A for 60 seconds and 20A for 10 seconds for start-up and inrush. Cycle testing confirms ≥2,000 cycles at 100% DOD, ≥3,000 at 80% DOD and ≥5,000 at 50% DOD.
- 3C continuous (12A)
- 15A 60-second / 20A 10-second pulse
- ≥2,000 cycles at 100% DOD
- ≥5,000 cycles at 50% DOD
Technical Specifications
| Mechanical | |
|---|---|
| Shape | Cylindrical |
| Case material | Nickel-plated stainless steel + PET shrink film |
| Diameter | 26.3 ± 0.2 mm (max 26.5 mm) |
| Height | 65.3 ± 0.3 mm (max 65.5 mm) |
| Weight | 88 ± 2 g |
| Electrical | |
|---|---|
| Model | IFR26650-40A |
| Chemistry | LiFePO₄ (LFP) |
| Nominal capacity | 4.0 Ah (4,000 mAh) |
| Nominal voltage | 3.2 V |
| Internal resistance | ≤20 mΩ |
| Standard charge | 0.5C (2,000 mA) |
| Max continuous charge | 1C (4,000 mA) |
| Standard discharge | 0.5C (2,000 mA) |
| Max continuous discharge | 3C (12,000 mA) |
| 60-second pulse | 15,000 mA |
| 10-second pulse | 20,000 mA |
| Charge temperature | 0 to +60 °C |
| Discharge temperature | −20 to +60 °C |
| Cycle life | ≥2,000 @100% DOD |
| Energy density | 147 Wh/kg |
| Compliance | UL1642 / UL2054 / UL1973 / IEC62133 / UN38.3 / RoHS / REACH |
Application Scenarios
One high-capacity cell platform for packs where runtime and cell count matter most.
Storage & Reliability
Store the cell at −20 to +45 °C in a dry environment, away from direct sunlight. Long-term storage above +45 °C accelerates calendar ageing; model-specific capacity-retention and recovery figures are available in the datasheet.
Related 26650 LiFePO4 Cells
IFR26650-38A — 3,800mAh High-Capacity Cell
138Wh/kg with 11,400mA 60-second pulses for AGV and ESS packs.
IFR26650-33A — 3,300mAh Long-Life Cell
3C continuous discharge and 3,000+ cycles for industrial equipment.
IFR26650-34D — 3,400mAh Wide-Temperature Cell
−40 °C to +60 °C discharge for photovoltaic, military and outdoor packs.
Need This Cell Built Into a PACK?
Tell us your voltage, capacity, current and enclosure requirements — our engineers reply within one business day with a solution and quotation.
NDA available upon request · Typical response within 12 hours