Description
Harness extreme current and bulletproof safety with the Vapcell IFR26650 2600mAh LiFePO4 cell. This 4-pack delivers an astonishing 55A continuous discharge at a nominal 3.2V, making it the definitive power source for automotive jump starters, RC engine starters, high-torque power tools, portable spot welders, and any application where instant, sustained high current is critical. LiFePO4 chemistry provides exceptional thermal stability and over 2000 charge cycles, dramatically outlasting standard lithium-ion cells. Important: This is a 3.2V LiFePO4 battery—it requires a dedicated LiFePO4-compatible charger and is not compatible with standard 3.7V lithium-ion devices or chargers. The flat top design is perfect for building custom high-current battery packs.
Key Features
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55A True Continuous Discharge (CDR) – Delivers massive, stable current for the most demanding high-drain applications. Handles engine starter surges, spot welder pulses, and heavy tool loads with ease. Ultra-low internal resistance ensures minimal voltage sag.
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LiFePO4 (Lithium Iron Phosphate) Chemistry – Inherently safer than traditional Li-ion. Exceptional thermal stability virtually eliminates fire or explosion risk. Provides over 2000 charge/discharge cycles—approximately 4–8 times the lifespan of typical lithium-ion cells.
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2600mAh / 3.2V Nominal – Optimized for maximum current output. Please note the 3.2V nominal voltage is not compatible with standard 3.7V devices. Total energy approximately 8.3Wh.
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26650 Form Factor – Larger diameter (26.5mm) allows superior current handling and heat dissipation. Always verify your device accepts 26650 cells before ordering.
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Flat Top Design – Ideal for spot-welding nickel strips when building custom high-current battery packs. Also compatible with spring-contact devices designed for flat top 26650 cells.
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Critical Charger Requirement – Must use a charger with LiFePO4 (3.2V) mode. Standard 3.7V lithium-ion chargers will dangerously overcharge this cell and cause permanent damage.
Parameters
Applications
Recommended For
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Automotive Jump Starters & Portable Emergency Power: Build a 12V (4S) jump starter that safely delivers hundreds of amps to start vehicles. The inherent safety and long life of LiFePO4 make it ideal for emergency equipment stored in vehicles.
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RC Engine Starters & Glow Plug Igniters: Provide instantaneous, sag-free current for starting nitro and gas RC engines. Consistent power delivery even under heavy load.
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High-Torque Cordless Power Tools: Build or rebuild heavy-duty 4S–5S tool battery packs for angle grinders, impact wrenches, and circular saws that demand sustained high current.
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Portable Spot Welders: Multi-cell parallel configurations deliver the immense short-circuit currents required for welding nickel strips and battery tabs.
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Modified E-Bikes & High-Power Mobility: Use in high-current battery packs where safety, cycle life, and consistent power delivery under acceleration are critical.
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High-Power Lighting Systems: HID searchlights, professional cinema lighting, and custom flashlight builds requiring sustained high current.
Not Recommended For
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Standard 3.7V Lithium-Ion Devices: Most consumer flashlights, power banks, and electronics are designed for 3.6V/3.7V cells. Using a 3.2V LiFePO4 cell may cause the device to not power on, display low battery, or perform poorly.
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Standard 3.7V Lithium-Ion Chargers: You must use a charger with dedicated LiFePO4 (3.2V) mode. Charging with a standard 4.2V Li-ion charger will overcharge and permanently damage the cell, creating a safety hazard.
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18650 or 21700 Devices: The 26650 format is larger (26.5mm diameter). It will not physically fit in smaller battery compartments.
FAQ
Q: Can I use this battery in my regular flashlight?
A: No, for two important reasons. First, this is a 26650 cell (26.5mm diameter)—it is physically larger than 18650 and 21700 cells and will only fit devices specifically designed for 26650. Second, this is a 3.2V LiFePO4 cell. Most flashlights are designed for 3.7V lithium-ion cells and will not function properly with a lower voltage.
Q: Can I charge this with my existing lithium-ion charger?
A: Only if your charger has a dedicated LiFePO4 (3.2V) mode. Standard lithium-ion chargers charge to 4.2V, which will dangerously overcharge a LiFePO4 cell (maximum safe voltage is 3.65V). Using the wrong charger will permanently damage the battery and could cause a fire. Always verify your charger supports LiFePO4 before use.
Q: Why is the capacity only 2600mAh? That seems low for a 26650.
A: This cell is engineered for maximum current output and safety, not maximum capacity. The 2600mAh is a trade-off to achieve the 55A continuous discharge, ultra-low internal resistance, and 2000+ cycle life. For applications requiring longer runtime at lower currents, consider a high-capacity 26650 cell like the Vapcell K62 (6200mAh/15A).
Q: What are the advantages of LiFePO4 over standard Li-ion?
A: Three key advantages: Safety – LiFePO4 is extremely stable and virtually eliminates the risk of thermal runaway or fire. Longevity – 2000+ cycles vs. 250–500 for typical Li-ion cells. Power Delivery – Lower internal resistance allows for cleaner, higher current output with less voltage sag. The trade-off is lower voltage (3.2V vs. 3.7V) and lower energy density.
Q: Can I build a 12V jump starter with this 4-pack?
A: Yes, a 4-pack provides exactly the number of cells needed for a 4S (12.8V nominal) jump starter configuration. This setup can deliver the high cranking amps needed to start most vehicles. Always use a properly rated LiFePO4-specific BMS, heavy-gauge nickel strips or copper bus bars, and matched cells.
Q: How should I store these cells when not in use?
A: Store at approximately 3.2–3.3V (50–70% charge for LiFePO4) in a cool, dry place. Use non-conductive battery cases to prevent short circuits. LiFePO4 cells have an exceptionally low self-discharge rate, making them perfect for emergency equipment stored for long periods.
