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 lithium iron phosphate cell must be stored in a dry, ventilated area away from conductive debris to avoid short circuits. The cell's internal safety vent requires a clear path for gas release in the event of overpressure.
- Mechanical Integrity: Avoid puncturing, crushing, or deforming the cell canister to prevent internal short circuits and thermal runaway.
- Safety Vent Function: Keep the safety vent area unobstructed to allow proper pressure relief during abusive conditions.
- Electrical Isolation: Store the cell with terminals protected by non-conductive tape to prevent accidental short circuits when not in use.
- Thermal Environment: Keep the cell in a moderate temperature environment to minimize capacity fade and internal resistance increase.
- Charging Compatibility: Use only a charger designed for LFP chemistry to avoid overvoltage or incorrect charge profile.
Charge the cell at a constant current of 4.2A (1C) until it reaches the full charge voltage, then maintain constant voltage until the current drops to a minimal level. Follow these steps to safely integrate the cell into a battery pack or application.
Required Equipment: LFP battery charger with constant current constant voltage capability, Digital multimeter with Kelvin clips, Insulating gloves, Non-conductive storage tray
- Inspect Cell
Inspect the cell for any signs of physical damage, swelling, or corrosion on the terminals before handling. - Connect Charger
Connect the positive terminal to the charger red lead and the negative terminal to the black lead using Kelvin clips to ensure low-resistance contact. - Set Charger Parameters
Set the charger to a constant current of 4.2A derived from the nominal 1C rate and a constant voltage limit appropriate for LFP chemistry. - Monitor Charging
Start the charging cycle and monitor cell voltage and temperature periodically to confirm operation within safe LFP parameters. - Terminate Charge
Terminate charging when the current drops to a minimal level indicating the cell has reached full charge capacity.
How does the 4200mAh capacity of this 26650 LFP cell affect its cycle life compared to lower-capacity LFP cells in high-voltage series packs?
This cell achieves 6000 cycles at 1C charge/discharge and 2000 cycles at 100% DOD, which is competitive with standard LFP cells despite its industry-leading 4200mAh capacity. The trade-off is that the higher energy density (149 Wh/kg) may require tighter thermal management in series configurations to maintain cell-to-cell consistency over the 20-year design life.
Can this 26650 LFP cell be directly integrated into existing battery management systems designed for standard 26650 LFP cells with lower capacity?
Yes, it is electrically compatible with standard 26650 LFP BMS designs, as it shares the same nominal voltage (3.2 V) and voltage limits (max charge 3.65 V, min discharge 2.0 V). However, the BMS must be configured for the higher capacity (4200 mAh) and the maximum continuous discharge current of 3C (12.6 A) to avoid under-rating protection thresholds.
What are the specific storage and handling requirements for this high-capacity 26650 LFP cell to ensure safety and longevity?
Store at 25°C with a state of charge between 30-50% for optimal calendar life. The cell includes a built-in safety vent and passes nail penetration tests without fire or explosion, but charge temperature must be strictly maintained between 0°C and 45°C to prevent lithium plating. Discharge below -20°C is not permitted.
The ATOMFAIR 4200mAh 26650 LFP battery delivers market-leading capacity and energy density for its form factor, with outstanding cycle life and intrinsic safety, though charging is restricted to 0–45°C and current limited to 1C, requiring careful thermal and power management in system design.
Positive
- Highest Capacity 26650 LFP Cell: With 4200mAh nominal capacity and 149Wh/kg energy density, this cell offers the highest energy storage in its form factor for LFP chemistry, enabling compact, high-voltage pack designs.
- Exceptional Cycle Life and Safety: Achieves 6000 cycles at 1C charge/discharge and passes nail penetration without fire or explosion, providing long operational life and robust intrinsic safety for stationary storage and auxiliary systems.
Trade-offs
- Restricted Charging Temperature Range: Charging is only permitted between 0°C and 45°C; operation below freezing can cause irreversible capacity loss or damage, requiring thermal management in cold environments.
- Moderate Maximum Charge Current: The maximum charge current is limited to 1C (4.2A), which may extend charging times in high-rate applications or when rapid recharge is needed.
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).
