Description
Extend your runtime to new limits with the Vapcell F58, a 21700 cell delivering an exceptional 5800mAh capacity—among the highest available in the 21700 form factor. This 2-pack provides a stable 12.5A continuous discharge, making it the ultimate power solution for devices where maximum endurance is non-negotiable: high-output LED flashlights, massive-capacity power banks, solar energy storage, and e-bike range extender packs. With approximately 16% more capacity than standard 5000mAh 21700 cells, the F58 keeps your devices running significantly longer between charges. The flat top design ensures broad compatibility and simplifies spot-welding for custom packs. For off-grid living, extended expeditions, and professional applications where changing batteries is impractical, the Vapcell F58 is the endurance workhorse you can rely on.
Key Features
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5800mAh Ultra-High Capacity – Among the highest capacity available in the 21700 form factor. Delivers approximately 16% more runtime than 5000mAh 21700 cells and over 65% more energy than a standard 3500mAh 18650. The definitive upgrade for runtime-critical devices.
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12.5A Continuous Discharge (CDR) – Stable, reliable power for regulated LED flashlights, USB power banks, solar storage systems, and similar medium-drain devices. Sufficient for fast-charging circuits and bright flashlight modes without overheating.
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Flat Top Design – Universally compatible with all standard 21700 spring-contact chargers, flashlights, and battery trays. The flat terminal is ideal for spot-welding nickel strips in custom battery packs.
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Long Cycle Life – Retains over 80% of initial capacity after 500 charge/discharge cycles under recommended conditions, reducing long-term replacement costs.
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2-Pack Convenience – Build a massive 11600mAh power bank with two cells in parallel, power your longest expeditions, or start your off-grid energy storage project.
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Vapcell Quality Control – Each cell is tested and matched for consistent capacity and low internal resistance, ensuring reliable performance across the pack. Based on leading ultra-high-capacity 21700 cell technology.
Parameters
Applications
Recommended For
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High-Output 21700 LED Flashlights: The ultimate cell for users who demand the longest possible runtime. On medium modes, a 5800mAh cell can illuminate for days. Perfect for search and rescue, professional inspection, and extended outdoor expeditions.
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Massive-Capacity USB Power Banks: Build an 11600mAh power bank with just two cells in parallel. The 12.5A rating comfortably supports 45W–65W USB-C PD fast charging. Ideal for multi-day trips, camping, and emergency preparedness.
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Solar Energy Storage & Off-Grid Systems: Low-current, long-duration energy storage. The 5800mAh capacity maximizes stored energy per cell, reducing the number of cells needed in solar light banks and small off-grid setups.
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E-Bike Range Extender Packs: When used in multi-parallel configurations with a proper BMS, the 5800mAh capacity significantly extends riding range while keeping pack weight manageable. Always use matched cells and a properly rated BMS.
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Wireless Security Cameras & IoT Sensors (21700 Compatible): Months of operation between charges. The massive capacity is ideal for remote, hard-to-access installations where frequent battery changes are impractical.
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Portable Power Stations & DIY Energy Storage: Multi-cell configurations deliver enormous total capacity for camping power stations, emergency backup, and mobile workstations.
Not Recommended For
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High-Power Vaping / Mechanical Mods: These require 20–35A continuous discharge. The F58 is a capacity cell, not a high-drain cell. Use dedicated high-drain cells such as the Molicel P45B (45A) instead.
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Cordless Power Tools: Drills, saws, and impact drivers demand 20–40A continuous current, far beyond the 12.5A CDR. Use Samsung 40T (35A) or equivalent high-drain cells.
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RC Cars, Drones & High-Drain Models: These require 20–30A+ continuous current. The F58 is engineered for maximum capacity, not extreme current delivery.
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Single-Cell E-Bike Applications: A single F58 cannot provide sufficient current for most e-bike motors. Always use a multi-parallel configuration with a BMS.
FAQ
Q: Is 5800mAh the real capacity? How much more runtime compared to 5000mAh?
A: Yes. The F58 uses an ultra-high-capacity 21700 cell core that delivers a true 5800mAh under standard test conditions. This provides approximately 16% more runtime than a 5000mAh 21700 cell. In practical terms, a flashlight that runs for 5 hours on high with a 5000mAh cell could run for nearly 6 hours with the F58.
Q: Can I use this battery for vaping or power tools?
A: No. Vaping devices and power tools require high continuous currents (typically 20–40A). The F58's CDR is 12.5A. Using it in such devices will cause severe voltage sag, rapid overheating, and potential battery damage. For these applications, use dedicated high-drain cells like the Molicel P45B or Samsung 40T.
Q: Can I use this to build an e-bike battery?
A: Yes, but only in a multi-parallel configuration. A single F58 cannot provide enough current for most e-bike motors. You must use multiple cells in parallel (e.g., 3P or 4P) so that each cell's load stays within the 12.5A limit. Always use a properly rated BMS, matched cells, and spot-welded nickel strips.
Q: What devices benefit the most from this cell?
A: Any device drawing under 12.5A where maximum runtime is the priority: 21700 LED flashlights, high-capacity power banks, solar energy storage systems, wireless security cameras, and long-running IoT sensor nodes. If you want the absolute longest runtime between charges, this is the cell for you.
Q: How does the F58 compare to the F60 or Samsung 50G?
A: The F58 offers 5800mAh with a 12.5A CDR. It sits between the Samsung 50G (5000mAh/9.8A) and the Vapcell F60 (6000mAh/12.5A) in terms of capacity. It provides significantly more runtime than 5000mAh cells while typically being more affordable than the flagship 6000mAh F60.
Q: How should I store these cells when not in use?
A: Store at 3.6–3.7V (approximately 40–50% charge) in a cool, dry place. Use non-conductive battery cases to prevent accidental short circuits. Avoid storing fully charged or deeply discharged for extended periods.
