Product Overview
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| The ATOMFAIR® 26650 High-Capacity LFP (LiFePO4) cylindrical cell delivers industry-leading energy density of 132Wh/kg with a nominal capacity of 3600mAh, making it an ideal choice for energy-dense applications. Engineered for long-duration and high-voltage series configurations, this cell offers exceptional cell-to-cell consistency, a design life of 20 years, and a 5-year warranty. With 1C charge/discharge cycle life reaching 7000 cycles and standard cycle life of 2000 cycles at 100% DOD, it provides outstanding longevity for stationary storage, EV auxiliary batteries, and backup power systems. Featuring a built-in safety vent and nail penetration without fire or explosion, it combines high energy with intrinsic LFP safety. |
Technical Specifications
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| PARAMETER |
VALUE |
| General Parameters |
| Nominal Capacity (0.2C) |
3600 mAh |
| Minimum Capacity (0.2C) |
3600 mAh |
| Nominal Voltage |
3.2 V |
| Energy Density |
132 Wh/kg |
| Internal Resistance |
≤20 mΩ |
| Weight |
≈87 g |
| Cycle Life (100% DOD, 25°C) |
2000 cycles |
| Charge Parameters |
| Max. Charge Voltage |
3.65 ± 0.03 V |
| Standard Charge Current |
0.5C |
| Max. Charge Current |
2C |
| Discharge Parameters |
| Min. Discharge Voltage |
2.0 V |
| Standard Discharge Current |
1C |
| Max. Continuous Discharge Current |
3C |
| Temperature Ranges |
| Charge Temperature |
0°C to 45°C |
| Discharge Temperature |
-20°C to 60°C |
| Manufacturing Compliance: Fully traceable production under ISO 9001:2025 and IATF 16949 standards. Custom form factors or electrode formulations available upon request. |
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Key Features & Advantages
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- High Capacity 26650 LFP Cell: 3600mAh nominal capacity with 132Wh/kg energy density — ideal for high-voltage, large-format battery packs.
- Exceptional Cycle Life: 7000 cycles at 1C charge/discharge, and 2000 cycles at 100% DOD under standard conditions.
- Long Design Life & Warranty: 20-year design life with 5-year warranty, ensuring reliable performance for long-term installations.
- Excellent Cell Consistency: Suitable for high-voltage series configurations with minimal voltage variation between cells.
- Intrinsic Safety: Built-in explosion-proof vent, passes nail penetration without fire or explosion, zero thermal runaway risk.
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APPLICATION SCOPE: Stationary energy storage systems (ESS), EV auxiliary batteries, telecom backup, UPS systems, solar street lights, and high-voltage battery packs requiring excellent cell matching.
PACKAGING: Anti-static plastic trays (50 cells per tray, 200 cells per master carton). Insulated terminal covers included for safe transport.
IMPORTANT NOTICE: For maximum cycle life, operate cells within recommended voltage window (2.5V – 3.65V) and avoid sustained high-temperature operation. Always use a dedicated LFP BMS with cell balancing, especially for high-voltage series strings.
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Frequently Asked Technical Questions
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What is the actual cycle life of this cell?
At 1C charge/discharge (100% DOD), the cell achieves 7000 cycles to 70% SOH. Under standard test conditions (0.5C/1C, 100% DOD), it delivers 2000 cycles. For applications with lower DOD, cycle life extends significantly.
Why is this an excellent choice for high-capacity applications?
With 3600mAh capacity and 132Wh/kg energy density, this cell offers one of the best energy-to-weight ratios in the 26650 LFP category, making it ideal for long-run-time applications.
Can I use this cell for high-voltage series configurations?
Yes, the cell is manufactured with tight capacity and internal resistance tolerances, making it suitable for 48V, 96V, or higher voltage packs. Pre-matching services are available upon request.
What safety certifications are available?
The cell complies with UL 1642, IEC 62133-2:2021, UN38.3, and CE. Batch-level test reports including nail penetration, overcharge, and thermal abuse are available upon request.
Does the 20-year design life require special operating conditions?
To achieve 20-year design life, maintain cell temperature below 35°C, avoid deep discharge below 2.5V, and operate at ≤80% DOD for daily cycling. The 5-year warranty covers manufacturing defects under normal use.
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