Description
4200mAh High-Capacity 26650 Lithium Iron Phosphate (LFP) Cylindrical Battery (4-Pack)COMMERCIAL GRADE · PRODUCTION
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TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official institutional quotations.
EMAIL: inquiry@atomfair.com
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Manufacturer: Atomfair LLC
Brand: ATOMFAIR®
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This cell requires operation within a 2.5V to 3.65V voltage window and a charge temperature range of 0°C to 45°C to avoid capacity degradation. A dedicated LFP battery management system with cell balancing is mandatory for high-voltage series configurations to prevent imbalance and thermal runaway.
- Voltage Limits: Maintain cell voltage between 2.5V and 3.65V during charge and discharge to preserve cycle life.
- Temperature Limits: Charge only between 0°C and 45°C, and discharge between -20°C and 60°C to ensure safe operation.
- BMS Requirement: Always use a dedicated LFP battery management system with cell balancing for series connections.
- Storage Packaging: Store cells in anti-static plastic trays with insulated terminal covers to prevent short circuits.
- Cycle Life Degradation: Expect 2000 cycles at 100% DoD and 6000 cycles at 1C rate when operating within specified limits.
Follow these steps to safely deploy the cells in a battery pack or system. Adherence to voltage and temperature limits ensures maximum cycle life and safety.
Required Equipment: LFP Battery Management System
- Inspect and Prepare Cells
Remove insulated terminal covers from cells only when ready to assemble the pack. - Connect BMS
Connect cells to a dedicated LFP battery management system with cell balancing for series strings. - Set Voltage Limits
Set charge cut-off voltage to 3.65V and discharge cut-off voltage to 2.5V on the BMS to prevent overcharge and deep discharge. - Charge Cells
Charge cells using a standard current of 0.5C or a maximum of 1C within the 0°C to 45°C temperature range. - Monitor Temperature
Monitor cell temperature during operation and avoid sustained exposure above 60°C discharge or 45°C charge.
How does charging at 1C versus 0.5C affect cycle life for the 4200mAh 26650 LFP cell?
Under standard conditions (0.5C charge, 1C discharge, 100% DOD at 25°C) the cell delivers 2000 cycles. Key features claim 6000 cycles at 1C charge/discharge, suggesting a higher rate may improve longevity, though the DOD for that claim is not specified. For maximum cycle life, operate within 2.5V–3.65V and avoid sustained high temperatures.
What are the voltage and temperature constraints for integrating this 26650 LFP cell into a high-voltage series stack?
Nominal voltage is 3.2V, max charge voltage 3.65±0.03V, min discharge 2.0V, and for extended cycle life keep within 2.5V–3.65V. Charge temperature range is 0°C to 45°C, discharge –20°C to 60°C. Excellent cell-to-cell consistency supports series configurations, but a dedicated LFP BMS with cell balancing is mandatory for high-voltage strings.
What safety certifications and handling precautions are required for the 26650 LFP cell during transport and installation?
The cell features a built-in explosion-proof vent and passes nail penetration without fire or explosion, confirming intrinsic LFP safety. It is manufactured under ISO 9001:2025 and IATF 16949 quality standards. Packaging uses anti-static plastic trays with insulated terminal covers for safe transport. Always use a dedicated LFP BMS with cell balancing in series strings.
This 4200mAh 26650 LFP cell achieves the highest capacity in its form factor with 149 Wh/kg energy density and 6000-cycle life at 1C, but requires careful thermal management during charging (0–45°C) and a dedicated BMS for high-voltage series configurations to maintain safe operation.
Positive
- Highest capacity 26650 LFP cell available: With 4200 mAh nominal capacity and 149 Wh/kg energy density, this cell delivers maximum energy per cell in the 26650 LFP format, enabling higher pack energy in limited volume.
- Exceptional cycle life and intrinsic safety: Specified cycle life of 6000 cycles at 1C charge/discharge and 2000 cycles at 100% DOD, combined with built-in explosion-proof vent and nail penetration safety without fire or explosion, ensures long-term reliability and safe operation.
Trade-offs
- Restricted charge temperature range: Charging is limited to 0°C to 45°C; operation outside this window may degrade performance or cause damage, requiring thermal management in cold environments.
- Dedicated BMS required for series strings: For high-voltage series configurations, a dedicated LFP BMS with cell balancing is mandatory to maintain voltage consistency and maximize cycle life, adding system complexity and cost.
Every advanced material, component, equipment, and instrument in our catalog is backed by rigorous testing. We maintain strict internal quality management frameworks and align with CE conformity metrics to deliver transparent, reproducible performance data via our public open-science repository.
To request raw batch performance data, submit formal vendor registration paperwork, or execute a fast-turnaround R&D manufacturing loop, contact us at inquiry@atomfair.com.
Item is dispatched under the Atomfair Shipping & Delivery Framework (Free worldwide shipping on orders over $59 USD). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
