Description
2500mAh High-Rate 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 charged within specified current limits to prevent thermal runaway. The built-in safety vent requires unobstructed operation and the cell should not be subjected to physical penetration.
- Charge Current Limitation: Charge current must not exceed 12500 mA and is only permissible when state of charge is ≤40% and duration is under 5 minutes.
- Pulse Discharge Duration: Pulse discharge at 75A is limited to 60 seconds to avoid overheating.
- Safety Vent Integrity: The safety vent must remain unobstructed to allow pressure relief under fault conditions.
- Mechanical Abuse Prevention: The cell passes nail penetration testing without fire or explosion, but deliberate puncturing should be avoided.
Follow these steps to safely charge and discharge the high-rate LFP battery cell. Adhere to current and duration limits to maintain performance and prevent damage.
Required Equipment: LFP battery charger with adjustable current limit
- Inspect the cell
Inspect the cell for any physical damage, swelling, or corrosion before each use. - Set standard charge current
Set the charger to a maximum charge current of 5000 mA for standard charging procedures. - Apply high-rate charge only under controlled conditions
If using 12500 mA charging, confirm that the cell's state of charge is 40% or less and limit the charge duration to less than 5 minutes. - Connect to load within discharge limits
Connect the cell to a load drawing no more than 50A continuous or 75A for pulses up to 60 seconds.
How does the 20C continuous discharge capability of the 26650 LFP cell affect thermal management requirements in a 50A UPS application?
The 20C continuous discharge (50A at 25°C) generates significant internal heat due to the ≤7 mΩ internal resistance, requiring active or passive cooling to maintain cell temperature within the -20°C to 60°C discharge range. At 50A, power dissipation from internal resistance is approximately 17.5W per cell, which must be managed to prevent thermal runaway or accelerated capacity fade, especially in enclosed UPS enclosures.
Can the ATOMFAIR 26650 LFP cell be directly integrated into an existing 12V lead-acid battery system for a starter battery replacement?
Yes, four cells in series provide a nominal 12.8V (3.2V each) with a max charge voltage of 14.6V (3.65V per cell), which is compatible with most lead-acid charging profiles if the charger's absorption voltage is adjusted. However, the LFP chemistry requires a constant current/constant voltage (CC/CV) charge algorithm with a strict 3.65V cutoff, and the BMS must handle the 75A pulse current for engine cranking without triggering overcurrent protection.
What are the storage and handling requirements for the 26650 LFP cell to maintain its 2000-cycle lifespan?
Store cells at 30-50% state of charge in a dry environment at 15-25°C to minimize calendar aging; avoid temperatures above 45°C or below -20°C during storage. The built-in safety vent prevents pressure buildup during abuse, but cells must be handled with insulated tools to prevent short circuits across the ≤7 mΩ internal resistance, which can deliver over 450A under dead short conditions.
The ATOMFAIR 26650 LFP cell offers high-rate capability with 50A continuous discharge and exceptional safety, but requires careful thermal management for charging and exhibits reduced capacity at low temperatures.
Positive
- Extreme high-rate discharge capability: Supports 50A continuous (20C) and 75A pulse (30C for 60s), enabling demanding power applications like starter batteries, power tools, and UPS systems.
- Intrinsic safety and long cycle life: Passes nail penetration test without fire or explosion and delivers 2000 cycles at 80% DOD, combining LFP thermal stability with robust lifespan.
Trade-offs
- Narrow charge temperature window: Charging limited to 0°C to 45°C; operating outside this range risks damage or reduced performance, requiring thermal management in cold environments.
- Conditional fast-charge capability: Maximum charge current of 12500 mA only permissible under restricted conditions (SOC ≤40%, <5 min); standard fast charge is 5000 mA, limiting rapid recharging flexibility.
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).
