Description
Experience extreme power and unmatched safety with the Vapcell D30, a 26650 LiFePO4 (lithium iron phosphate) cell engineered for the most demanding high-drain applications. This 2-pack delivers a staggering 50A continuous discharge with a nominal 3.2V, making it the definitive choice for automotive jump starters, RC engine starters, high-torque power tools, and DIY battery projects where instantaneous current and thermal stability are critical. With a cycle life exceeding 2000 charges and inherent resistance to thermal runaway, the D30 outperforms traditional lithium-ion cells in both longevity and safety. Important: This is a 3.2V LiFePO4 cell—it requires a dedicated LiFePO4-compatible charger and is not compatible with standard 3.7V lithium-ion devices or chargers.
Key Features
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50A True Continuous Discharge (CDR) – Massive, stable current for extreme applications. Handles engine starter surges, high-torque tool loads, and pulse applications effortlessly. 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 risk. Delivers over 2000 charge cycles, dramatically outlasting standard cells.
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3000mAh / 3.2V Nominal – Optimized for high-current delivery. Note the 3.2V nominal voltage—not compatible with standard 3.7V devices. Total energy approximately 9.6Wh.
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26650 Form Factor – Larger diameter (26.5mm) for superior current handling and heat dissipation. Always verify your device accepts 26650 cells.
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Flat Top Design – Ideal for building custom high-current battery packs with spot-welded nickel strips. 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 not charge correctly and may damage the cell.
Parameters
Applications
Recommended For
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Automotive Jump Starters & Portable Power: The 50A CDR and LiFePO4 safety make this ideal for 12V (4S) jump starter packs. Deliver hundreds of amps to start vehicles reliably and safely.
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RC Engine Starters & Glow Plugs: Instantaneous high current for starting nitro and gas RC engines. Consistent power delivery without sag.
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High-Torque Cordless Power Tools: Build or rebuild heavy-duty tool battery packs (4S–5S configurations). The D30 handles angle grinders, impact wrenches, and circular saws with ease.
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DIY High-Current Battery Packs: Spot welders, portable inverters, and any project requiring reliable, ultra-high-rate discharge with superior safety.
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High-Power Lighting Systems: HID spotlights, professional cinema lighting, and custom flashlight builds that demand sustained high current.
Not Recommended For
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Standard 3.7V Lithium-Ion Devices: The D30's 3.2V nominal voltage is incompatible with most consumer flashlights, power banks, and electronics designed for 3.6V/3.7V cells. Device may not power on or may show low battery.
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Standard 3.7V Lithium-Ion Chargers: Must use a charger with dedicated LiFePO4 (3.2V) mode. Using a standard 3.7V charger will overcharge and permanently damage the cell.
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18650 or 21700 Devices: The 26650 format is larger (26.5mm diameter). Verify compatibility before ordering.
FAQ
Q: Can I use this battery in my regular 18650 or 21700 flashlight?
A: No, for two critical reasons. First, this is a 26650 cell (26.5mm diameter)—it is physically larger and will not fit in 18650 or 21700 battery compartments. Second, this is a 3.2V LiFePO4 cell. Most consumer flashlights are designed for 3.7V lithium-ion cells. Using a 3.2V battery may result in the light not turning on, low brightness, or a persistent low-battery warning.
Q: Can I charge this with my regular lithium-ion charger?
A: No. You must use a charger that specifically supports LiFePO4 batteries (3.2V mode). Standard 3.7V lithium-ion chargers charge to 4.2V, which will dangerously overcharge a LiFePO4 cell (max charge voltage 3.65V), causing permanent damage and potential safety hazards. Always verify your charger has a dedicated LiFePO4 setting before use.
Q: What are the advantages of LiFePO4 over regular Li-ion?
A: LiFePO4 offers three key advantages: Safety (excellent thermal stability, virtually no fire/explosion risk), Longevity (2000+ cycles vs. 250–500 for typical Li-ion), and High Discharge Capability (lower internal resistance for cleaner high-current delivery). The trade-offs are lower nominal voltage (3.2V vs. 3.7V) and lower energy density (less capacity for the same size).
Q: Why is the capacity only 3000mAh? That seems low for a 26650.
A: The D30 prioritizes current delivery and safety over maximum capacity. The 3000mAh capacity, combined with the 3.2V voltage, provides approximately 9.6Wh of energy. This cell is designed for applications that need extreme current bursts (50A+) where standard high-capacity cells would fail or overheat. For maximum runtime at lower currents, consider a high-capacity 26650 like the Vapcell K62 (6200mAh/15A) instead.
Q: Can I build a 12V jump starter with this 2-pack?
A: A 12V jump starter requires a 4S configuration (4 cells in series = 12.8V nominal). This 2-pack provides two cells; you would need two additional D30 cells (4 total) to build a proper 12V jump starter pack. Always use matched cells, a properly rated LiFePO4 BMS, and heavy-gauge nickel strips or bus bars for the high currents involved.
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 accidental short circuits. LiFePO4 cells have an exceptionally low self-discharge rate, making them ideal for emergency equipment that sits idle for long periods.
