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Low temperature LFP battery cell structured as a standard 26650 cylindrical component with ultra stable olivine cathode chemistry.

LiFePO4 26650 Low-Temp Cell 3400mAh 4-Pack

$37.00

Institutional Procurement & Supply Compliance: As a verified US supplier, Atomfair accepts formal institutional Purchase Orders (POs), contract billing schedules, and custom procurement loops for university and national laboratories, and corporate R&D departments globally.

3400mAh LiFePO4 26650 cells charge to -30°C and discharge to -50°C, with 3C continuous output, 2000-cycle life, and ISO 9001:2025 traceability. Order now.

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Description

3400mAh Ultra-Low-Temperature 26650 Lithium Iron Phosphate (LFP) Cylindrical Battery (4-Pack)

Product Overview
The ATOMFAIR® 26650 Low-Temperature LFP (LiFePO4) cylindrical cell is engineered for extreme cold-weather energy storage. With a nominal capacity of 3400mAh and the ability to charge at temperatures as low as -30°C and discharge down to -50°C without external heating, this cell eliminates the need for battery warmers in harsh winter environments. Offering high continuous discharge current (3C / 10.2A), pulse capability (5C / 17A for 30s), excellent low-temperature efficiency (>90% at -50°C), military-grade reliability, and competitive pricing, it is the ideal choice for off-grid solar storage, EV auxiliary batteries, cold-region telecom backup, polar research, and cold-chain logistics. For bulk inquiries or official volume quotations, please contact us via email at inquiry@atomfair.com.

Technical Specifications

PARAMETER VALUE
General Parameters
Nominal Capacity (0.5C) 3400 mAh
Minimum Capacity (0.5C) 3350 mAh
Nominal Voltage 3.2 V
Energy Density 124 Wh/kg
Internal Resistance ≤15 mΩ
Weight ≈85 g
Cycle Life (80% DOD, 25°C) 2000 cycles
Dimensions (Diameter x Height) 26.3±0.1 mm x 65.7±0.2 mm
Charge Parameters
Max. Charge Voltage 3.65 ± 0.03 V
Standard Charge Current 0.5C
Max. Charge Current 3.0C @ T > 0°C; 0.5C @ T ≤ 0°C; 0.2C @ T ≤ -20°C
Discharge Parameters
Min. Discharge Voltage 2.00 V @ T > -20°C; 1.50 V @ T ≤ -20°C
Standard Discharge Current 1.0C
Max. Continuous Discharge Current 3.0C
Discharge Performance >90% @ -40°C to 1.5V; >90% @ -20°C to 2.0V; >98% @ 60°C to 2.0V
Temperature Ranges
Charge Temperature -30°C to 60°C
Discharge Temperature -50°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.

Key Features & Advantages
  • Direct Charge at Sub-Zero Temperatures: No pre-heating required — capable of charging at -30°C with reduced current.
  • Excellent Low-Temperature Discharge Efficiency: >90% capacity retention at -50°C, ensuring reliable power in extreme cold.
  • High Rate Capability: Supports 3C continuous discharge and 5C pulse (30s) over a wide temperature range (-50°C to 60°C).
  • Military-Grade Reliability at Civilian Prices: Exceptional durability and 2000-cycle life (80% DOD) without premium cost.

APPLICATION SCOPE: Off-grid solar storage in arctic regions, EV auxiliary batteries, telecom backup in extreme climates, polar research equipment, cold-chain logistics, and portable power for winter sports.
PACKAGING: Anti-static plastic trays (50 cells per tray, 200 cells per master carton). Insulated terminal covers included for safe transport.
IMPORTANT NOTICE: For charging at -30°C, use the recommended CC-CV profile with a reduced charge current (≤0.2C). The cell will not accept charge below -30°C. Always pair with a low-temperature BMS that enables charging only when cell temperature is within safe limits.

TAILORED SOLUTIONS FOR RESEARCH
Contact our engineering team for technical support or official institutional quotations.
EMAIL: inquiry@atomfair.com
Manufacturer: Atomfair LLC
Brand: ATOMFAIR®

The cell must be stored and operated within specified temperature ranges to maintain performance and safety. Charging below -30°C is prohibited, and a low-temperature BMS is mandatory for all applications.

  • Operating Temperature Range: The cell can be charged between -30°C and 60°C and discharged between -50°C and 60°C, but charging below -30°C is not accepted.
  • Voltage Limits: Minimum discharge voltage is 2.00V above -20°C and 1.50V at or below -20°C; maximum charge voltage is 3.65±0.03V.
  • Charge Current Restrictions: Charge current must be reduced at low temperatures: 3C above 0°C, 0.5C at or below 0°C, and 0.2C at or below -20°C.
  • BMS Requirement: A low-temperature BMS must be used to enable charging only when cell temperature is within safe limits.
  • Short Circuit Prevention: Cells are shipped with insulated terminal covers and should be stored in anti-static trays to prevent short circuits.

This procedure describes the steps to safely handle and charge the ATOMFAIR 26650 LFP cell in low-temperature environments. Compliance with these steps ensures reliable operation and prevents cell damage.

Required Equipment: Low-temperature battery management system (BMS), Programmable CC-CV charger

  1. Inspect Cells
    Inspect each cell for physical damage or deformation before use.
  2. Install with BMS
    Install cells into the battery pack with a low-temperature BMS that monitors cell voltage and temperature.
  3. Confirm Temperature
    Confirm cell temperature is within the acceptable charging range before initiating charging.
  4. Configure Charger
    Set the charger to a CC-CV profile with the appropriate reduced charge current based on ambient temperature.
  5. Avoid Over-Low Charging
    Do not attempt to charge the cell if temperature falls below -30°C, as the cell will not accept charge.
  6. Set Discharge Cutoff
    Set the discharge cutoff voltage to 2.00V for temperatures above -20°C and 1.50V for -20°C or below.
  7. Store Safely
    Store cells in anti-static trays with insulated terminal covers when not in use.

How does the maximum charge current for this 26650 LFP cell change when charging below 0°C, and what is the trade-off for charging time?

The maximum charge current is temperature-dependent: above 0°C, 3.0C (10.2A) is allowed; at 0°C or below, it drops to 0.5C (1.7A); at -20°C or below, it is further limited to 0.2C (680 mA). At -30°C, the cell can be charged at 0.2C, which significantly extends charge time compared to room-temperature operation, but this trade-off enables direct charging without pre-heating and prevents lithium plating at extreme cold.

What BMS and charge profile requirements are needed when integrating this battery into a cold-climate energy storage system?

A low-temperature BMS that enables charging only when cell temperature is within the safe range (-30°C to 60°C) is essential. The BMS must also handle the shifted minimum discharge voltage: 2.00V above -20°C and 1.50V at or below -20°C. A CC-CV charge profile with current reduced per temperature (0.2C at ≤-20°C, 0.5C at ≤0°C) is required to ensure safe charging without heater assistance.

What storage and handling precautions are necessary for this ultra-low-temperature LFP cell to ensure safe transport and operation?

The cell can be stored and discharged at temperatures as low as -50°C but must not be charged below -30°C. For transport, each cell is packaged with insulated terminal covers in anti-static plastic trays (50 per tray, 200 per master carton). Users must ensure that the battery is never subjected to charging attempts below -30°C, as the cell will not accept charge and could be damaged.

This 26650 LFP cell delivers reliable discharge down to -50°C and allows charging at -30°C without external heating, but requires reduced charge current at sub-zero temperatures and a compatible low-temperature BMS for safe operation.

Positive

  • Direct sub-zero charging without pre-heating: Capable of charging at -30°C using a CC-CV profile with reduced current (≤0.2C), eliminating the need for external battery warmers in extreme cold environments.
  • High low-temp discharge efficiency: Retains >90% capacity at -50°C and >90% at -40°C (to 1.5V cutoff), ensuring reliable power delivery in polar or cold-chain applications without significant energy loss.

Trade-offs

  • Reduced charge current at low temp: Maximum charge current drops to 0.2C at -30°C and 0.5C at 0°C, significantly extending charge times compared to operation above 0°C where 3.0C is allowed.
  • Requires low-temperature BMS: A BMS that monitors cell temperature and enables charging only within safe limits (-30°C to 60°C) is mandatory to prevent damage from charging below the minimum temperature threshold.

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).

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