KETELES K820 & K820 PRO eBike Replacement Battery

KETELES K820 & K820 PRO eBike Replacement Battery48V 13Ah Replacement Battery for KETELES K820 K820PRO High Power Upgrade Hailong Upgrade your KETELES K820 or K820PRO with this 48V 13Ah Hailong lithium downtube battery, engineered to deliver stronger torque, improved hill climbing ability, and stable power output for commuting, long distance rides, and demanding terrain. Key Features Powerful Output (48V 13Ah): Provides strong acceleration and sustained torque for inclines and heavy load riding. A+

48V 13Ah Replacement Battery for KETELES K820 / K820PRO — High-Power Upgrade Hailong

Upgrade your KETELES K820 or K820PRO with this 48V 13Ah Hailong lithium downtube battery, engineered to deliver stronger torque, improved hill-climbing ability, and stable power output for commuting, long-distance rides, and demanding terrain. 

Key Features

• Powerful Output (48V 13Ah): Provides strong acceleration and sustained torque for inclines and heavy-load riding.
• A+ Grade Cells (2600mAh): Durable long-life cells designed for deep-cycle performance.
• 30A Intelligent BMS: Offers protection against overcharge, over-discharge, overcurrent, temperature issues, and short circuits.
• Wide Motor Compatibility: Supports 200W–1000W systems commonly used in KETELES e-bikes.
• 5-Pin Charging Port and USB Output: Reliable 5-pin charging system plus a USB port for powering mobile devices.
• Integrated Lock with 2 Keys: Provides secure battery mounting and theft protection.
• On/Off Power Switch: Helps preserve battery life when the bike is not in use.

Product Specifications

• Voltage: 48V
• Capacity: 13Ah
• BMS: 30A Intelligent Motherboard
• Charging Pins: 5-Pin
• Charger Included: 54.6V 3A Fast Charger
• Default Connector: XT60
• Cell Type: 2600mAh A+ Grade
• Configuration: 13S5P (48V 13Ah)
• Dimensions: 370mm × 110mm × 90mm
• Battery Type: Lithium-Ion (Li-Ion)
• Suitable Motor Power: 200W – 1000W
• Weight: 5.5 kg
• Colour: Black
• Certifications: UKCA, CE, UN38.3, MSDS

Compatibility & Important Note

This Hailong downtube battery is compatible with the KETELES K820 and K820PRO. The original mounting tray/base plate used in these models may not be compatible with this Hailong battery, which can prevent the unit from mounting securely.

To ensure a correct and stable fit, we provide a compatible Hailong-style base plate for free, along with the charger included at no extra cost. This allows for proper installation without needing external parts or professional modification.

What’s Included

• 1 × 48V 13Ah Hailong Battery
• 1 × 54.6V 3A Fast Charger
• 2 × Locking Keys
• 1 × 5-Pin Discharge Cable with Base (XT60)
• 1 × Instruction Manual

Why Choose This Battery for KETELES K820 / K820PRO?

This 48V 13Ah Hailong battery is ideal for riders needing enhanced torque, sustained power delivery, and longer ride time. With its protective BMS, secure lock, and long-lasting cell structure, it is a durable and dependable upgrade or replacement when paired with the correct base plate.

Warning

Always charge the battery using the supplied charger. Do not short-circuit or expose to extreme temperatures. Ensure the base plate replacement is completed correctly before installation. Follow all safety guidelines and dispose of the battery responsibly according to local regulations.