Description
High-Performance 21700 Downtube Battery Pack for E-Bikes & EVs
Upgrade your electric ride with the premium 72V 40Ah Polly E-Bike Battery, engineered for riders who demand maximum range, power, and reliability. Featuring high-capacity 21700 lithium-ion cells, this downtube battery pack is designed to deliver consistent performance for long commutes, off-road adventures, or heavy-duty electric vehicle applications. Whether you are powering a 750W, 1000W, or 1500W motor, this battery provides the stable voltage and robust current output needed to keep you moving with confidence.
Key Features & Highlights
- Advanced 21700 Cell Technology: Utilizes superior 21700 lithium-ion cells for higher energy density, longer lifespan, and improved heat dissipation compared to standard 18650 cells.
- Flexible Voltage Options: Available in multiple configurations including 72V, 60V, 52V, 48V, and 36V to perfectly match your specific motor and controller requirements.
- High Capacity Power: Choose between 30Ah and 50Ah capacities (with 40Ah as a standard high-performance option) to maximize your riding range and reduce charging frequency.
- Universal Downtube Design: The sleek, integrated downtube form factor ensures a balanced weight distribution and a streamlined aesthetic that fits most e-bike frames seamlessly.
- Wide Motor Compatibility: Optimized for high-power motors ranging from 750W to 1500W, ensuring smooth acceleration and sustained high-speed performance.
- Smart BMS Protection: Equipped with an intelligent Battery Management System (BMS) that protects against over-charging, over-discharging, short circuits, and thermal overload.
Why Choose the Polly E-Bike Battery?
Designed for the modern electric rider, this battery pack combines cutting-edge cell chemistry with a durable, weather-resistant housing. The 21700 cells offer a significant jump in power delivery, allowing for quicker acceleration and more efficient energy usage. Whether you are converting a traditional bike or enhancing your existing e-bike setup, this versatile battery pack is built to handle the demands of daily commuting and recreational riding alike. Experience the difference in performance with a battery designed to go the distance.






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