FINDING YOUR POWER STARTS HERE.
At Bicycle Motor Works, transparency is at the core of everything we do. Our commitment to quality begins with sharing real knowledge, not just selling products. Explore the cell brands we trust, how our batteries are built, and what truly impacts performance—so you can confidently find the power that’s right for you.
If you’re building or buying an eBike battery, the cell inside matters more than anything else.
Voltage and amp-hours mean nothing without understanding:
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Continuous discharge capability (power)
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Internal resistance (heat & efficiency)
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Energy density (range)
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Cycle life (longevity)
This guide compares the most relevant high-performance 21700 cells used in eBike batteries today.
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Learn more about the brands we carry.
Bicycle Motor Works builds battery packs using certified, premium cell brands with proven, data-backed performance—featuring advanced cell chemistry and engineering designed to deliver higher power, greater efficiency, and enhanced overall performance.
Smart Monitoring Bluetooth BMS
by 100 Balance Smart Active Balance BMS
Introducing the Bluetooth Battery Collection, proudly built by Bicycle Motor Works — a family-owned U.S. manufacturer. Every pack is engineered for high-current performance, long-range riding, and advanced monitoring through the 100 BALANCE Smart Active Balance BMS. Unlike conventional BMS boards that only “bleed off” high cells near the top of charge, this platform supports active balancing and multi-channel communications for deeper visibility and control. 📱 100 BALANCE Smart Active Balance BMS Real-time visibility + real balancing current Monitor your battery from your phone via Bluetooth. The manual lists real-time monitoring including voltage, current, temperature, and state of charge (SOC) through the mobile app connection. What “Active Balancing” means (with real numbers) This BMS is specified with: 1A continuous active balancing current Bidirectional DC flyback active balancing method (as described in the manual) Why it matters: Active balancing can help keep cell groups closer together over time (especially valuable in high-current builds), which supports more consistent performance and pack longevity.
Featured Collections
Our winter performance packs provide enhanced battery capacity and reliability. Designed for extreme conditions, these packs keep your ride smooth and efficient even in colder climates.
Winter Performance Bike Power
Cold Weather Optimized. Lower Resistance. Higher Efficiency.
Featuring our Tabless cells that reduce:
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Baseline resistance
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Uneven current distribution
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Heat concentration
Resulting in better voltage stability, improved efficiency, and stronger winter output.
The Original Pocket Rocket Series
Compact Power. Maximum Punch.
The Pocket Rocket is engineered for riders who demand high-current performance in a minimal enclosure.
Highlights:
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Lightweight, reduced-profile design
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High-amp discharge capability
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Available in 48V & 52V configurations
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Ideal for performance builds and tight frame spaces
Best For: Agile builds, lightweight commuters, and high-power mid-drives.
TrimLine Collection
Refined-Footprint Design. Efficient Space Saver.
Features:
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Minimized enclosure dimensions
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Optimized internal cell arrangement
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Efficient energy density
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Compatible with smaller mounting systems
Best For: Custom builds, smaller frames, and streamlined aesthetics.
