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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Cells must be stored in anti-static trays with insulated terminal covers. Charge only within 0°C to 45°C and discharge within -20°C to 60°C.
- Voltage Limits: Do not exceed 3.65V charge voltage or discharge below 2.0V.
- Temperature Ranges: Maintain charge temperature between 0°C and 45°C and discharge temperature between -20°C and 60°C.
- BMS Requirement: Always use a dedicated LFP BMS with cell balancing for high-voltage series strings.
- Storage and Transport: Store cells in anti-static plastic trays with insulated terminal covers to prevent short circuits.
- Thermal Management: Avoid sustained high-temperature operation to maximize cycle life and prevent degradation.
Follow these steps to safely configure and charge the battery pack for initial use. Proper handling ensures long cycle life and prevents damage.
Required Equipment: Dedicated LFP BMS with active cell balancing, Insulated terminal covers, Anti-static plastic trays
- Connect cells in series
Connect cells in series using a dedicated LFP BMS with active cell balancing. - Set charging parameters
Set the charging current limit to 0.5C (2.1A) and the voltage limit to 3.65V on the charger. - Configure BMS discharge limit
Configure the BMS discharge current limit to 3C (12.6A) for continuous operation. - Store safely
Store the battery pack in anti-static plastic trays with insulated terminal covers when not in use.
How does the 4200mAh capacity of this 26650 LFP cell compare to standard 26650 LFP cells, and what is its energy density?
This cell offers the highest capacity among 26650 LFP cells at 4200mAh nominal and 149 Wh/kg energy density. Standard 26650 LFP cells typically range from 3000–3500 mAh, so this cell provides approximately 20–40% higher capacity per cell, enabling higher energy density packs for stationary storage and high-voltage configurations.
What voltage window should be maintained for maximum cycle life when using this LFP cell in series configurations?
For maximum cycle life, operate within 2.5 V to 3.65 V. The product description explicitly states that staying within this recommended voltage window and avoiding sustained high-temperature operation maximizes cycle life. A dedicated LFP BMS with cell balancing is required for high-voltage series strings to maintain cell consistency.
What safety features and manufacturing standards are incorporated into this 26650 LFP cell?
The cell includes a built-in explosion-proof vent and passes nail penetration testing without fire or explosion, ensuring zero thermal runaway risk. It is manufactured under ISO 9001:2025 and IATF 16949 standards, providing traceable quality control. The intrinsic safety of LFP chemistry combined with these features makes it suitable for stationary storage, backup power, and UPS applications.
The 4200mAh 26650 LFP cell delivers the highest capacity in its form factor with 149Wh/kg energy density and 6000-cycle life at 1C, but requires careful thermal management and a dedicated BMS for high-voltage series strings.
Positive
- Highest capacity 26650 LFP cell: With 4200mAh nominal capacity and 149Wh/kg energy density, this cell provides the highest energy storage available in the 26650 LFP format, enabling longer runtime or reduced cell count in high-voltage packs.
- Exceptional cycle life and safety: Rated for 6000 cycles at 1C charge/discharge and 2000 cycles at 100% DOD, with a 20-year design life. Intrinsic safety features include a built-in explosion-proof vent and nail penetration test passed without fire or explosion.
Trade-offs
- Narrow charge temperature range: Charging is restricted to 0°C to 45°C; sustained high-temperature operation reduces cycle life, requiring thermal management in hot environments.
- Requires dedicated LFP BMS for series: For high-voltage series strings, a 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 excl. heavy equipment). Return is governed by the Atomfair Return & Refund Policy (7-day technical return window).
