Product Overview
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| The ATOMFAIR® 26650 Low-Temperature LFP (LiFePO4) cylindrical cell is engineered for extreme cold-weather energy storage. With a nominal capacity of 3200mAh 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 (5C / 16A), pulse capability (32A for 30s), 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. |
Technical Specifications
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| PARAMETER |
VALUE |
| General Parameters |
| Nominal Capacity (0.5C) |
3200 mAh |
| Minimum Capacity (0.5C) |
3150 mAh |
| Nominal Voltage |
3.2 V |
| Energy Density |
119 Wh/kg |
| Internal Resistance |
≤15 mΩ |
| Weight |
≈85 g |
| Cycle Life (80% DOD, 25°C) |
2000 cycles |
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| Charge Parameters |
| Max. Charge Voltage |
3.65 ± 0.03 V |
| Standard Charge Current |
1.0C |
| 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 |
5.0C |
| 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. |
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Key Features & Advantages
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- Direct Charge & Discharge at Extreme Low Temperatures: No pre-heating required — capable of charging at -30°C and discharging at -50°C.
- High Power Output in Cold Environments: Supports continuous 16A discharge (5C) and pulse 32A (30s) with >90% efficiency at low temperatures.
- Fast Charging above 0°C: 3C rapid charging capability for reduced downtime in warmer conditions.
- Military-Grade Reliability at Civilian Prices: Excellent durability and robust cycle life (2000 cycles @ 80% DOD) without premium cost.
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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.
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Frequently Asked Technical Questions
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Can the AF26650LFP03 be charged at -30°C without heating?
Yes, the cell is specifically engineered for direct charging at -30°C using a reduced current (0.2C). No external heater is required, making it ideal for remote off-grid systems in polar regions.
What is the maximum continuous discharge current at low temperature?
At temperatures above -20°C, the cell supports 5C (16A) continuous discharge. Below -20°C, the recommended continuous discharge current is reduced to 1.0C (3.2A) to ensure safety and longevity.
Is this cell compatible with standard 26650 battery holders?
Yes, the AF26650LFP03 follows the standard 26.3mm diameter and 65.7mm height format, making it a drop-in replacement for most 26650 holders and pack configurations. Always verify terminal polarity and insulation.
What safety certifications are available?
The cell complies with UL 1642, IEC 62133-2:2021, UN38.3, and CE. Batch-level test reports including nail penetration, overcharge, and thermal abuse are available upon request.
Can I parallel multiple cells for higher capacity?
Yes, parallel connection is allowed. Ensure cells are matched within 5% in voltage and internal resistance before paralleling. Use a common busbar and avoid mixing cells from different production batches.
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