Description
4000mAh High-Capacity 26650 Lithium Iron Phosphate (LFP) Cylindrical Battery | ATOMFAIRCOMMERCIAL 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 lithium iron phosphate cell must be stored in a dry environment away from conductive materials. The integrated safety vent must remain unobstructed during use to ensure proper pressure relief.
- Safety Vent Constraint: The cell contains a safety vent designed to release internal pressure under fault conditions and must not be blocked or punctured.
Follow these steps to safely handle and initialize the cell for first use. Proper precautions prevent damage and ensure reliable performance.
Required Equipment: Digital multimeter
- Inspect Cell
Inspect the cell casing for any physical damage, dents, or leaks before handling. - Measure Voltage
Measure the open-circuit voltage using a digital multimeter to confirm the cell is not shorted or deeply discharged. - Connect to Charger
Connect the cell to a compatible LFP charger set to the appropriate constant current and constant voltage limits.
How does the 4000mAh 26650 LFP cell's cycle life at 1C charge/discharge compare to its standard 100% DOD cycle life, and what trade-off does this represent for high-rate applications?
The ATOMFAIR 26650 LFP cell delivers 6000 cycles at 1C charge/discharge, significantly exceeding the 2000 cycles at 100% DOD under standard conditions. This trade-off means that operating at a consistent 1C rate yields three times the cycle life, making it ideal for high-rate stationary storage or backup power systems where deep discharges are avoided, but full DOD cycling may be preferred for applications requiring maximum energy utilization per cycle.
Can the ATOMFAIR 26650 LFP cell be integrated into existing 12V or 24V battery packs designed for other 26650 chemistries, and what voltage constraints must be considered?
Yes, the cell's nominal voltage of 3.2V and maximum charge voltage of 3.65±0.03V are standard for LFP chemistry, allowing direct integration into packs designed for LFP-based 26650 cells. However, compatibility with packs originally designed for higher-voltage chemistries like NMC or LCO requires careful BMS reconfiguration to respect the 2.0V minimum discharge voltage and avoid over-discharge, as the lower voltage plateau may trigger premature cutoff in systems calibrated for 3.6V nominal cells.
What are the critical handling and storage requirements for the ATOMFAIR 26650 LFP cell to ensure safety and prevent capacity degradation?
The cell must be charged only within 0°C to 45°C and discharged within -20°C to 60°C to avoid irreversible capacity loss or internal damage. Storage at partial charge (around 30-50% SOC) in a dry, cool environment below 25°C is recommended to minimize calendar aging. The built-in safety vent provides passive overpressure protection, but mechanical abuse such as crushing or puncturing should be avoided despite nail penetration testing showing no fire or explosion.
The ATOMFAIR 26650 LFP cell delivers 4000mAh capacity with 142Wh/kg energy density and exceptional cycle life of 6000 cycles at 1C rate, yet its charge temperature window of 0–45°C and reduced 2000-cycle life at 100% DOD are critical operational constraints for pack designers.
Positive
- Highest capacity in 26650 LFP format: With 4000mAh nominal capacity and 142Wh/kg energy density, this cell sets a benchmark for 26650 lithium iron phosphate batteries, enabling high-energy-density packs for stationary storage and auxiliary power.
- Inherent safety and long cycle life: The LFP chemistry passes nail penetration without fire or explosion, and the cell supports 6000 cycles at 1C charge/discharge, offering both intrinsic safety and exceptional longevity under moderate use.
Trade-offs
- Narrow charge temperature range: Charging is only permitted between 0°C and 45°C; operation outside this window risks lithium plating and capacity fade, requiring thermal management in cold or hot environments.
- Reduced life at full depth of discharge: Standard cycle life at 100% DOD is 2000 cycles—one third of the 6000 cycles achievable at 1C charge/discharge—meaning full-capacity cycling significantly shortens service life.
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).
