Product Overview
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| The ATOMFAIR® 26650 High-Capacity NCM (LiNixCoyMn1-x-yO2) cylindrical cell delivers industry-leading energy density of 190Wh/kg with a nominal capacity of 5000mAh, making it the highest capacity 26650 cell available. Engineered for high-voltage series configurations and long-duration applications, this cell offers exceptional cell-to-cell consistency, a design life of 8 years, and zero-fire/zero-explosion field record. With 1C charge/discharge cycle life reaching 3000 cycles (to 80% SOH) and standard cycle life of 1500 cycles at 100% DOD, it provides reliable performance for stationary storage, EV auxiliary batteries, and backup power systems. Featuring a built-in safety vent and imported-equivalent quality, this model is ideal for demanding commercial applications. |
Technical Specifications
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| PARAMETER |
VALUE |
| General Parameters |
| Nominal Capacity (0.2C) |
5000 mAh |
| Minimum Capacity (0.2C) |
4900 mAh |
| Nominal Voltage |
3.6 V |
| Energy Density |
190 Wh/kg |
| Internal Resistance |
≤20 mΩ |
| Weight |
≈95 g |
| Cycle Life (100% DOD, 25°C) |
1500 cycles |
| Charge Parameters |
| Max. Charge Voltage |
4.20 ± 0.03 V |
| Standard Charge Current |
0.5C |
| Max. Charge Current |
1C |
| Discharge Parameters |
| Min. Discharge Voltage |
2.75 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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- Ultra-High Capacity NCM Cell: 5000mAh nominal capacity with 190Wh/kg energy density — the highest capacity 26650 cell on the market.
- Exceptional Cycle Life: 3000 cycles at 1C charge/discharge (80% SOH), and 1500 cycles at 100% DOD under standard conditions.
- Design Life & Reliability: 8-year design life with imported-equivalent quality, proven zero-fire/zero-explosion field record.
- Excellent Cell Consistency: Suitable for high-voltage series configurations with minimal voltage variation between cells.
- Intrinsic Safety: Built-in explosion-proof safety vent, meeting international safety standards.
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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 (2.75V – 4.2V) and avoid sustained high-temperature operation. Always use a dedicated BMS with cell balancing, especially for high-voltage series strings. Do not overcharge or over-discharge.
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Frequently Asked Technical Questions
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What is the actual cycle life of this NCM cell?
At 1C charge/discharge (100% DOD), the cell achieves 3000 cycles to 80% SOH. Under standard test conditions (0.5C/1C, 100% DOD), it delivers 1500 cycles to 70% SOH. For applications with lower DOD, cycle life extends significantly.
Why is this the highest capacity 26650 cell?
Through advanced NCM electrode engineering and high-density cathode formulation, we achieve 5000mAh in the standard 26650 form factor while maintaining safety and cycle stability. No other 26650 cell offers this capacity.
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 overcharge, nail penetration, and thermal abuse are available upon request.
Does the 8-year design life require special operating conditions?
To achieve 8-year design life, maintain cell temperature below 35°C, avoid deep discharge below 2.75V, and operate at ≤80% DOD for daily cycling. The 5-year warranty covers manufacturing defects under normal use.
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