Rear Rack E-Bike Battery 36V / 48V 17.5Ah / 20.8Ah

High-Capacity Lithium-Ion Battery for Electric Bicycles

This rear rack e-bike battery is a practical high-capacity power solution for compatible electric bicycles and conversion systems. Available in 36V and 48V configurations, with capacities including 17.5Ah and 20.8Ah, it is designed for compatible 250W, 500W, 750W and 1000W motor systems.

The battery uses lithium-ion cells, an integrated 30A Battery Management System and a robust rear rack design. A built-in power indicator, keyed safety lock, reflector and rear light add practical features for everyday commuting and utility cycling.

General Details

• Battery Type: Lithium-Ion
• Battery Version: Rear Rack Battery Pack
• Available Voltage: 36V / 48V
• Available Capacity: 17.5Ah / 20.8Ah
• Cell Type: 18650 / 21700 depending on variant
• Compatible Motor Ratings: 250W / 500W / 750W / 1000W
• BMS: 30A
• Charging Method: CC/CV
• Certification: CE
• Cycle Life: Up to 1,000 cycles
• Warranty: 2 years
• Mounting: Rear bicycle rack
• Temperature Range, Charging: 0°C to 45°C
• Temperature Range, Discharging: -15°C to 65°C

Available Configurations

48V 17.5Ah

• 10S7P battery configuration
• Approx. 840Wh energy capacity
• Suitable for compatible 48V motor systems
• Supplied with 54.6V 2A charger

36V / 48V 20.8Ah

• High-capacity configuration
• Suitable for compatible 36V or 48V systems depending on selected version
• Cell configuration and exact charger specification vary by voltage/capacity option

Please select the correct voltage and capacity for your e-bike system.

Performance

The battery is designed to provide reliable energy storage for electric bicycles, including commuter, utility and conversion-bike applications.

The available capacities provide substantial energy storage for longer rides, although actual range will depend on the motor, controller, rider weight, terrain, riding speed, weather conditions, tyre pressure and level of pedal assistance.

Approximate nominal energy:

• 36V 20.8Ah: 748.8Wh
• 48V 17.5Ah: 840Wh
• 48V 20.8Ah: 998.4Wh

Safety & Features

Integrated 30A BMS

The battery incorporates a 30A Battery Management System designed to provide protection against:

• Overcharge
• Over-discharge
• Overcurrent
• Short circuit
• Overload

Battery Power Indicator

A built-in indicator allows you to monitor the approximate remaining battery level.

Keyed Safety Lock

The rear rack battery includes a locking mechanism designed to help secure the battery to the bicycle and reduce the risk of unauthorised removal.

Rear Rack Mounting

The battery is designed to mount onto a compatible rear bicycle rack, making it suitable for bicycles where a frame-mounted battery is not practical.

Integrated Rear Light & Reflector

The rack battery incorporates a reflector and rear light to improve visibility when riding in lower-light conditions.

Specifications

Compatibility

This battery is intended for compatible electric bicycles and conversion systems using the corresponding battery voltage.

Compatible motor ratings may include:

• 250W
• 500W
• 750W
• 1000W

Always verify that the battery voltage matches your motor and controller before ordering.

For example:

• 36V battery → compatible 36V electrical system
• 48V battery → compatible 48V electrical system

Also check the battery dimensions, mounting rack, connector, controller requirements and charging voltage before installation.

Installation

The rear rack is designed to accommodate common bicycle wheel sizes, with the supplied information indicating compatibility with 26-inch, 27.5-inch and 700C bicycles when correctly adjusted.

Before ordering, carefully check the available mounting space and battery dimensions against your bicycle.

Package Includes

• 1 × Rear Rack E-Bike Battery
• 1 × Compatible Battery Charger
• Rear rack mounting components
• Safety lock and keys

Exact accessories may vary according to the selected battery configuration.

Important Safety Notes

• Confirm the battery voltage before ordering.
• Use only the appropriate lithium-ion charger for the selected battery.
• The 48V 17.5Ah version uses a 54.6V charging voltage.
• Do not use a charger intended for a different battery voltage.
• Do not disassemble, crush, puncture or modify the battery.
• Keep away from fire and excessive heat.
• Do not immerse the battery in water.
• Stop using the battery if it becomes swollen, damaged or unusually hot.
• Ensure the battery is securely mounted before riding.
• Check all electrical connections before use.
• Actual range varies according to riding conditions and vehicle configuration.