Short Description
The Molicel P50B represents the absolute pinnacle of 21700 cell technology, delivering an unprecedented combination of 5000mAh ultra-high capacity and a staggering 50A continuous discharge (10C). This 6-pack is engineered for the most demanding applications on the planet: high-performance e-bike battery packs, heavy-duty cordless power tools, competition-level vaping, extreme-output flashlights, and professional RC racing. With an ultra-low internal resistance of approximately 8mΩ, the P50B virtually eliminates voltage sag even under 50A loads, ensuring your device performs at peak output from start to finish. The flat top design is universally compatible with spring-contact devices and ideal for spot-welding into custom battery packs. When your project demands the absolute maximum in both power and capacity, nothing surpasses the Molicel P50B.
Key Features
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Unmatched 5000mAh + 50A Performance – The only 21700 cell that combines true 5000mAh capacity with a genuine 50A continuous discharge, delivering industry-leading energy density and power output in a single cell.
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10C Ultra-High Discharge Rate – Engineered for sustained extreme loads; the 50A rating provides ample headroom for even the most power-hungry devices.
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Ultra-Low Internal Resistance (~8mΩ) – Minimizes heat generation and voltage sag under load, keeping your device cooler and maintaining maximum power delivery.
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Flat Top Design – Compatible with all standard 21700 spring-contact chargers, flashlights, and battery holders. The flat positive surface ensures reliable spot-welding connections for pack builders.
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Massive Capacity Advantage – At 5000mAh, this cell provides significantly longer runtime than 4000-4500mAh high-drain alternatives, reducing the need for frequent battery swaps.
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6-Pack Bulk Value – Ideal quantity for building a 10S or 13S e-bike pack, rebuilding multiple tool batteries, or powering a fleet of high-drain devices.
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Molicel Genuine Quality – Manufactured to the strictest industry standards, trusted by professionals worldwide for consistent performance and uncompromising safety.
Parameters
Applications
Recommended For
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High-Performance E-Bike & E-Scooter Packs: The 50A continuous discharge supports powerful 750W-1500W motors, while the 5000mAh capacity significantly reduces the number of parallel cells needed in a pack. Ideal for 36V (10S), 48V (13S), and 52V (14S) configurations.
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Heavy-Duty Cordless Power Tools: Angle grinders, circular saws, high-torque impact wrenches, and rotary hammers that demand sustained 40-50A current. Rebuild your tool packs with superior runtime and power.
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Competition-Level Vaping: Mechanical mods and high-wattage regulated devices pushing builds down to 0.08Ω. The P50B delivers safe, sag-free power at 50A with the longest vaping sessions possible from a single cell.
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Extreme-Output 21700 Flashlights: FET-driven hot-rod lights and multi-emitter searchlights requiring sustained 30-45A. The 5000mAh capacity provides unprecedented turbo runtimes for search and rescue or cave exploration.
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Professional RC Racing: Cars, boats, and quadcopters that demand instantaneous 50A+ bursts and the longest possible race or practice sessions.
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Portable Spot Welders & High-Power DIY Projects: Build compact, high-energy battery packs for welders, inverters, or field power supplies.
Not Recommended For
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Low-Power Long-Runtime Devices: Solar lights, wireless sensors, or smart locks. The 50A capability is wasted; choose a lower-cost 5000mAh 10A 21700 cell.
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18650-Only Devices: This is a 21700 cell (21mm x 70mm). It will not physically fit in 18650 compartments. Verify your device's battery specifications before ordering.
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Standard 5V/2A USB Power Banks: The P50B's performance far exceeds the requirements of a basic power bank. Use a high-capacity, lower-drain cell for better economy.
FAQ
Q: What makes the P50B different from the P45B?
A: The P50B upgrades both capacity and current: 5000mAh vs 4500mAh, and 50A vs 45A continuous. Both share the same ultra-low ~8mΩ internal resistance. Choose the P50B if you need maximum runtime and the highest possible current. The P45B remains an excellent choice if you prioritize slightly lower cost with nearly identical power density.
Q: What does 10C mean, and how does it relate to 50A?
A: The "C" rating is a multiplier of the cell's capacity in ampere-hours. The P50B has a 5000mAh capacity (5.0Ah). 10C means 5.0Ah × 10 = 50A continuous discharge. This indicates the cell can safely deliver 50A of continuous current without overheating or dangerous voltage sag.
Q: Can I use this battery in my 18650 device?
A: No. The P50B is a 21700 cell, meaning it has a 21mm diameter and 70mm length. Standard 18650 cells are 18mm × 65mm. The P50B will not fit unless your device is explicitly designed to accept both 18650 and 21700 batteries. Always check your device manual.
Q: Is this a protected battery?
A: No, the Molicel P50B is an unprotected flat top cell. This is standard for high-drain applications to allow unrestricted current flow. Your device must have its own protection circuit for single-cell use. For multi-cell series or parallel packs, you must install an external BMS rated for at least 60A.
Q: Can I solder directly onto the battery terminals?
A: Absolutely not. Direct soldering exposes the cell to extreme heat that can damage internal separators, deform the safety vent, and potentially cause a thermal runaway. Always use a spot welder with nickel strips. For wire connections, use nickel tabs with pre-soldered leads that are spot-welded onto the cell.
Q: How should I store these cells long-term?
A: Store at 3.6-3.7V per cell (approximately 40-50% state of charge) in a cool, dry environment. Always use non-conductive battery cases to prevent accidental short circuits. Avoid storing cells fully charged or deeply discharged for extended periods, as this accelerates capacity degradation.
