36V 24Ah Downtube E-Bike Battery – Varstrom

The Varstrom 36V 24Ah Downtube Battery is a high-capacity, long-range power solution designed for riders who need maximum distance, dependable performance, and balanced weight distribution. Built in a downtube (Hailong-style) case, this battery integrates cleanly with most standard e-bike frames while maintaining a professional, factory-style finish.

With a 36V 24Ah capacity, this pack delivers substantially increased energy storage compared to smaller batteries, providing extended ride times and consistent power output for moderate-power hub or mid-drive motor systems. It’s engineered for stable discharge, efficient energy use, and reliable long-term operation — ideal for riders covering longer distances or using higher assist levels more frequently.

Mounted centrally along the frame, the downtube design improves handling and balance compared to rear-rack batteries, while keeping the bike sleek and low-profile.

Key Features

✅ 36V 24Ah lithium battery – extended long-range performance
✅ Downtube frame-mount design for optimal weight distribution
✅ Clean, integrated appearance for conversion or OEM-style builds
✅ Stable discharge performance for smooth, consistent power
✅ Suitable for 36V motor systems (hub or mid-drive)
✅ Removable locking case for security and convenient charging
✅ Heavy-duty outer casing built for daily riding use

Performance & Use

This high-capacity battery setup is ideal for:

Long-distance commuter e-bikes
Leisure / touring builds
Hybrid and trekking bikes
Light off-road riding
Standard-power conversion kits

It provides efficient support for typical 250W–500W systems, offering a strong balance between maximum range, power stability, and practical frame-mounted design.

Design Benefits

Because the battery mounts along the downtube:

Weight stays low and central
Handling remains stable and predictable
Frame stress is reduced compared to rack-mounted systems
The bike keeps a clean, professional finish

Compatibility

Designed for use with:

36V controllers
Standard downtube mounting rails
Most 36V hub and mid-drive conversion kits

Always confirm voltage compatibility before connecting to your system.

Important Notice

This battery is intended for use with 36V e-bike systems only. Ensure your motor controller, display, and charger match the battery specifications. Incorrect pairing may cause system damage.