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

26650 3400mAh Low-Temperature LFP Battery -30°C Charge

$9.00

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Commercial-grade 26650 LiFePO₄ cell with 3400mAh capacity, charges at -30°C, discharges at -50°C, 2000 cycles at 80% DOD. In stock.

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Description

3400mAh Ultra-Low-Temperature 26650 Lithium Iron Phosphate (LFP) Cylindrical Battery | ATOMFAIR

COMMERCIAL GRADE · PRODUCTION

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®

This document outlines the electrical safety limits and environmental constraints for the ATOMFAIR 26650 LFP battery. Adherence to these guidelines ensures safe operation and prolongs cycle life.

  • Continuous Discharge Limit: Do not exceed a continuous discharge current of 10.2A to avoid thermal overload.
  • Pulse Discharge Limit: Do not apply pulse currents exceeding 17A for longer than 30 seconds.
  • Charge Temperature Range: Charge the battery only when ambient temperature is above -30°C to ensure proper lithium intercalation.
  • Discharge Temperature Range: Discharge is permissible down to -50°C ambient temperature without external heating.

Follow these steps to initialize and deploy the battery for cold-weather applications. Proper handling maximizes performance and safety under extreme conditions.

Required Equipment: CC/CV Charger

  1. Inspect Battery
    Inspect the battery casing for cracks, dents, or leakage before handling.
  2. Connect Charger
    Connect the battery to a CC/CV charger set to the correct voltage and current parameters.
  3. Verify Temperature
    Confirm the ambient temperature is above -30°C for charging or above -50°C for discharging.
  4. Set Discharge Load
    Set the discharge load to draw no more than 10.2A continuous current.
  5. Monitor Pulse Discharge
    Limit pulse discharge current to 17A and duration to 30 seconds maximum.

How does the 3400mAh capacity and discharge performance of this 26650 LFP cell degrade at -50°C compared to room temperature?

This cell maintains >90% discharge efficiency at -50°C when discharged to 1.5V, compared to >98% at 60°C to 2.0V. The nominal capacity is 3400mAh at 0.5C, and the minimum discharge voltage drops from 2.00V above -20°C to 1.50V at or below -20°C to sustain power delivery under extreme cold.

Can this low-temperature LFP battery be integrated into an existing 12V or 24V battery pack designed for standard LiFePO4 cells without modifying the BMS charge profile?

Yes, it is compatible with standard LFP BMS topologies because its nominal voltage is 3.2V and maximum charge voltage is 3.65±0.03V, matching typical LiFePO4 chemistry. However, the BMS must support reduced charge current at low temperatures—0.5C at ≤0°C and 0.2C at ≤-20°C—to prevent damage, which may require a temperature-compensated charge algorithm.

What are the storage and handling requirements for this cell to maintain its low-temperature performance and cycle life?

Store the cell in a dry, cool environment within its rated temperature range of -30°C to 60°C for charging and -50°C to 60°C for discharging. The cell has an internal resistance of ≤15 mΩ and weighs approximately 85g; avoid physical deformation or short-circuiting the terminals. For long-term storage, maintain a state of charge between 30-50% and store at temperatures between 10-25°C to preserve cycle life of 2000 cycles at 80% DOD.

The 26650 3400mAh LFP battery delivers exceptional low-temperature performance, enabling charging at -30°C and discharging at -50°C without heating, but imposes strict charge current derating below 0°C and requires a BMS compatible with voltage-cutoff reduction at extreme cold.

Positive

  • Ultra-low-temperature operation without heating: Supports charge down to -30°C and discharge down to -50°C without external thermal management, enabling reliable energy storage in polar and cold-chain applications.
  • High pulse discharge at extreme cold: Delivers 5C (17A) pulse for 30 seconds with over 90% capacity retention at -50°C, providing robust burst power where standard cells fail.

Trade-offs

  • Charge current derating at low temperature: Maximum charge current drops from 3.0C above 0°C to 0.2C below -20°C, significantly prolonging recharge time in cold environments.
  • Voltage cut-off shift below -20°C: Minimum discharge voltage lowers from 2.00V to 1.50V at ≤-20°C, requiring a BMS or system design that accommodates the expanded voltage window to avoid premature shutdown.

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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