EXALZ High-Capacity Down-Tube Hailong E-Bike Battery Pack –

36V / 48V / 52V Options (9Ah to 20Ah Capacities) with Integrated 30A BMS, USB Port & Smart Fast Charger (Optimized for Bafang BBS02, BBS03 & BBSHD Motors)

Supercharge your mid-drive conversion or custom electric bicycle build with the high-performance EXALZ Hailong Down-Tube Lithium-Ion Battery Pack. Available in 36V, 48V, and high-voltage 52V options with capacities ranging from 9Ah up to 20Ah, this energy module is specifically engineered to power high-torque hub and mid-drive motor kits, including the Bafang BBS02, BBS03, and BBSHD.

Equipped with an integrated 30A Smart Battery Management System (BMS) for active thermal and voltage regulation, this battery features a built-in 5V USB charging port to power your smartphone or GPS unit on the go. Complete with a lockable quick-release mounting bracket and matching lithium charger, the EXALZ Hailong series delivers maximum range, stable voltage output, and dependable power for your daily commutes and off-road trails.

⚠️ Mid-Drive Compatibility & Dimensions Guide

IMPORTANT FITMENT & SYSTEM MATCHING CHECKLIST:

• Bafang Mid-Drive Approved: Fully tested and compatible with Bafang BBS02 (500W/750W), BBS03, and BBSHD (1000W+) motor controllers, as well as hub motor setups and trolling motors.

• Physical Dimensions: Compact Hailong frame housing measures 360mm x 90mm x 110mm (14.17" L x 3.54" W x 4.33" H). Fits standard water bottle cage mounting bosses.

• 30A Smart BMS Protection: Integrated 30A BMS ensures high continuous discharge currents with zero voltage sag under heavy motor loads.

• Includes Charger & USB Port: Every battery includes a matching smart AC fast charger and a built-in 5V USB output port.

🚀 Key High-Performance Features

• Tailored Voltage & Capacity Selection: Choose between 36V, 48V, or 52V platforms across capacities from 9Ah to 20Ah to match your speed, torque, and range requirements.

• Optimized for Bafang BBS Series: Engineered to handle the sustained current draws demanded by Bafang BBS02, BBS03, and BBSHD motor systems.

• Built-in 30A Smart BMS: Real-time cell monitoring protects against over-charging, deep discharge, short circuits, and thermal spikes while maintaining balanced cell voltage.

• Integrated 5V USB Power Port: Onboard USB port allows convenient charging for mobile phones, cycle computers, and bike lights during rides.

• Quick-Release Frame Mount & Key Lock: Securely bolts to your down-tube water bottle bosses with a key-locking mechanism for theft protection and easy indoor charging.

• CE & KC Safety Certified: Built to rigorous European and Asian international safety and quality standards.

📊 Technical Specifications Matrix

⚙️ Installation & Operating Instructions

1. Mount Bracket: Screw the Hailong base bracket securely onto your frame's down-tube bottle cage bosses.

2. Connect Controller: Join the base plate’s power output cable to your motor controller (Bafang or standard controller), ensuring correct polarity (+ to +, - to -).

3. Lock & Ride: Slide the battery pack onto the track until fully seated, turn the key to the locked position, and switch the battery power button ON.

📦 Package Contents

• 1 x EXALZ Hailong Lithium-Ion Battery Pack with Integrated 30A BMS & 5V USB Port

• 1 x Lockable Down-Tube Base Mounting Plate with Discharge Lead

• 1 x Smart Automatic Lithium Battery Fast Charger

• 2 x Security Lock Keys

• 1 x User Installation & Care Sheet

Power your Bafang mid-drive setup with reliable EXALZ Hailong power. Select your voltage and capacity options below, then click Add to Cart to upgrade your ride today!

36V/48V/52V 18650 Hailong E-bikeLithium-Ion Battery Pack

• 36V/48V/52V multi-voltage compatibility for electric vehicles
• 25A-30A continuous discharge capacity with 60A peak performance
• Advanced thermal management (-15°C to 65°C operational range)
• Five-layer safety protection system (OVP/OCP/SCP/Short Circuit/Balancing)

Parameter Details

36V Specification

Voltage: 36V (Nominal) / 42V (Charge) / 28V (Cut-off)
Cells: 18650 Lithium-ion
Dimensions: 360×90×110mm
Charging Method: CC/CV
Charge Temperature:-15-65℃
Discharge Temperature:-15-65℃
Discharge Current: 25A (Continuous) / 60A (Peak)
Cycle Life: 1000 cycles (≥80% capacity retention)
Protection: Overcharge/Over-discharge/Overcurrent/Short Circuit/Balancing

48V Specification

Voltage: 48V (Nominal) / 54.6V (Charge) / 36.4V (Cut-off)
Cells: 18650 Lithium-ion
Dimensions: 360×90×110mm
Way of Charge: CC/CV
Charge Temperature:-15-65℃
Discharge Temperature:-15-65℃
Discharge Current: 30A (Continuous) / 60A (Peak)
Cycle Life: 1000 cycles (≥80% capacity retention)
Protection: Overcharge/Over-discharge/Overcurrent/Short Circuit/Balancing

52V Specification

Voltage: 52V (Nominal) / 58.8V (Charge) / 39.2V (Cut-off)
Cells: 18650 Lithium-ion
Dimensions: 360×90×110mm
Charging Method: CC/CV
Charge Temperature:-15-65℃
Discharge Temperature:-15-65℃
Discharge Current: 30A (Continuous) / 60A (Peak)
Cycle Life: 1000 cycles (≥80% capacity retention)
Protection: Overcharge/Over-discharge/Overcurrent/Short Circuit/Balancing

Usage Scenarios

✓ Electric bicycles & scooters
✓ eMTB,eRoad, eTour, and eCity bikes
✓ Commercial delivery vehicles requiring high torque output
✓ Emergency power backup for outdoor equipment
✓ Safety Assurance: Cell balancing system maintains voltage consistency
✓ Temperature Control: Operates reliably in extreme climates (-15°C to 65°C)
✓ Universal Compatibility: Supports multiple vehicle models through adjustable terminals