36V 20.8Ah Rear Rack E-Bike Battery – 748.8Wh (Road Legal / EPAC Compatible)

The Varstrom 36V 20.8Ah Rear Rack Battery is a high-capacity lithium battery designed for standard road-legal e-bike systems. Running at 36V, this configuration is suitable for UK/EU EPAC-compliant builds when paired with a road-legal motor setup (250W continuous rated system with speed-limited assist).

Built using quality 18650 cells in a 10S8P configuration, this pack delivers 748.8Wh of energy — ideal for long-distance commuting, delivery use, leisure rides, and touring. The rear rack design keeps your bike frame triangle free while maintaining stable weight distribution over the back wheel.

A 30A BMS (Battery Management System) protects against over-charge, over-discharge, over-current, and short circuit, ensuring safe, consistent performance and long service life. With a rated cycle life of around 1000 charge cycles, this battery is made for regular use.

The included 42V 4A charger provides reliable charging, while the integrated charge indicator and secure mounting system make day-to-day use simple and practical.

🔋 Key Features

✅ 36V 20.8Ah high-capacity pack (748.8Wh)
✅ Road-legal voltage for UK/EU compliant e-bikes
✅ 18650 lithium cells – 10S8P, 80 cells total
✅ 30A BMS protection system
✅ Rear rack mounting design
✅ Up to ~1000 charge cycles
✅ 42V 4A charger included
✅ Ideal for commuting & long-range riding

📏 Specifications

FeatureDetailsVoltage36VCapacity20.8AhEnergy748.8WhCell Type18650 – 2600mAhConfiguration10S8P (80 cells)BMS30ACharge Cut-off42VDischarge Cut-off28VCharger42V 4AWeight3.9kgSize (L×W×H)476 × 165 × 89mm

Important Notice

This battery is suitable for use with road-legal 36V e-bike systems. Overall bike legality depends on the motor’s rated output and speed restriction. Always ensure your full setup complies with local regulations.