36V 15.6Ah Downtube eBike Battery – Varstrom

The Varstrom 36V 15.6Ah Downtube Battery is a high-capacity, frame-mounted power solution built for reliability, balanced weight distribution, and extended e-bike performance. Housed in a downtube (Hailong-style) case, this battery integrates cleanly with most standard e-bike frames, making it ideal for commuter builds, leisure riders, and conversion projects that demand longer range.

With a 36V 15.6Ah capacity, this pack provides increased energy storage compared to standard 13Ah batteries, delivering consistent power output and improved ride distance for moderate-power hub or mid-drive motor systems. It’s engineered for stable discharge, efficient energy use, and dependable long-term operation.

Mounted centrally on the frame, the downtube design enhances bike handling and balance compared to rear-rack batteries, while maintaining a sleek, low-profile look.

Key Features

✅ 36V 15.6Ah lithium battery – extended range and strong performance
✅ Downtube frame-mount design for improved weight distribution
✅ Clean, integrated appearance for conversion or OEM-style builds
✅ Reliable discharge performance for smooth, steady power delivery
✅ Suitable for 36V motor systems (hub or mid-drive)
✅ Removable locking case for security and convenient charging
✅ Durable outer casing built for daily riding conditions

Performance & Use

This higher-capacity battery setup is ideal for:

Commuter e-bikes
Leisure / hybrid builds
Light off-road riding
Standard-power conversion kits

It provides efficient support for typical 250W–500W systems, offering an excellent balance between range, weight, and size without the bulk of higher-voltage packs.

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.