Shatter your range records and feed clean, unrelenting current directly into your high-wattage custom build. The Pro-Series 5-Pin Hailong Downtube E-Bike Battery is a premium, competition-grade power solution optimized for demanding electric mountain bikes, heavy-duty utility commuters, and DIY conversion configurations.

 Specifically designed to interface flawlessly with high-torque drivetrains, this modular pack features an integrated 5-Pin heavy-duty base docking plate engineered to comfortably drive power-hungry Bafang BBS02, BBSHD, CYC, and custom hub motors from 200W up to 2000W peak lines without dropping voltage.

Built around precision-matched, ultra-dense Grade-A+++++ premium cell architectures, this rugged battery core yields an exceptional 1500+ deep charge lifecycles, ensuring years of peak acceleration and stable top-speed holding power.

🚀 Key High-Performance Features

• Premium 5-Pin Heavy-Current Docking Connection: Upgraded from fragile standard multi-pin configurations. The heavy-gauge 5-Pin terminal block minimizes resistance, stops port arcing, and maximizes raw current transfer into your controller line.

• Massive 120A Peak Discharge Throttle Overhead: Driven by an integrated safety-fused 30A or 40A Continuous BMS architecture, these packs comfortably handle massive 75A to 120A instantaneous peak loads for punchy hill climbs and immediate off-the-line throttle responses.

• High-Visibility LED Real-Time Fuel Gauge: Take the guesswork out of your trail loops. The integrated, tactile push-button diagnostic LED matrix instantly indexes your remaining energy reserve levels.

• All-Weather Sub-Zero Thermal Protection Loop: Formulated to withstand extreme seasonal riding conditions, allowing reliable cell charging down to an ultra-low -20°C (-4°F) up to 55°C (131°F) and discharging down to -20°C up to 65°C.

• Dual UL & CE Safety Quality Certifications: Fully inspected and independently audited under stringent global CE and UL production safety protocols with zero trace toxic compounds.High-concerned chemical: None).

📊 System Architecture & Custom Selection Spec Sheet

Use our variant selector dropdown options above to configure the exact nominal system voltage line and target amp-hour capacity box matching your motor controller settings:

💡 High-Contrast LED Diagnostics Breakdown

Press the tactile button located near the battery shell's handle to verify active string voltages instantly:

• 🟢🟢🟢🔴 1 Red, 3 Green Lights: 100% Maximum Full Saturation Capacity

• 🟢🟢🔴 1 Red, 2 Green Lights: 75% Active Operational Energy Reserve

• 🟢🔴 1 Red, 1 Green Light: 50% Half Capacity Path

• 🔴 1 Red, 0 Green Lights: 25% Low Capacity Floor (Immediate recharge cycle recommended to preserve long-term battery cell health)

🔌 Complete Installation Hookup Package Included

Every premium Hailong block ships as a fully integrated electrical solution, terminated with durable XT60 gold-plated connection links (Male & Female matching pairs included) to solder or splice directly into your motor's main wiring loom.

📦 What's Inside the Box?

• 1 x Aleaivy/Cheterdoli 5-Pin Hailong High-Capacity Lithium-Ion Battery Pack

• 1 x Heavy-Duty Reinforced Frame Mount Fixing Plate with Integrated Output Discharging Line

• 1 x Multi-Stage Smart CC/CV Grid Wall Charger (42V 2A or 54.6V 2A US Standard Profile)

• 2 x Unique Heavy-Grip Theft-Prevention Security Barrel Keys

• 1 x Matching Male & Female XT60 Power Terminal Connector Set

• 3 x Structural Mounting Screws (Includes 1 Replacement Spare)

Stop letting severe voltage sag limit your Bafang mid-drive motor’s absolute potential. Lock into an ultra-premium, 5-pin heavy discharge core. Select your system voltage, target capacity size, and click Add to Cart to claim your e-bike upgrade today!

Charging note: Please connect the charger to the power supply first, and then connect the charger to the battery