Cheterdoli High-Capacity 21700 Hailong 5-Pin E-Bike Battery Pack –

 36V / 48V / 52V 20Ah (20,000mAh) with Built-In BMS & Charger (Fast US Domestic Warehouse Shipping)

Upgrade your electric mountain bike, commuter e-bike, or high-torque mid-drive build with the premium Cheterdoli 21700 Hailong 5-Pin Lithium-Ion Battery Pack.

 Engineered with high-density 21700 battery cell technology rather than standard 18650 cells, this 20Ah (20,000mAh) pack delivers greater energy storage, reduced thermal strain under heavy acceleration, and extended range performance.

Featuring an industry-standard 5-Pin Hailong discharge interface, this battery connects securely to high-current base plates to handle high amp draws from mid-drive and hub motors up to 1000W+.

Fully UL- and CE-certified, every pack includes a built-in protective Battery Management System (BMS) for continuous safety and ships directly from our US warehouse for fast delivery without international customs delays.

⚠️ Voltage Selection & 5-Pin Compatibility Notice

IMPORTANT SELECTION & INTERFACE GUIDE:

• 5-Pin Discharge Interface: Please verify that your current Hailong cradle or motor wiring uses a 5-pin discharge terminal connection before ordering.

• Motor Power Output: Engineered for high-draw mid-drive motor systems (Bafang BBS02, BBSHD) and hub motor setups rated from 250W up to 1000W+.

• Fast US Warehouse Shipping: Ships directly from domestic US logistics hubs for quick ground transit times.

🚀 Key High-Performance Features

• Advanced 21700 High-Density Cells: Utilizes larger 21700 lithium-ion cells for improved energy capacity, lower internal resistance, and longer battery lifecycle compared to standard 18650 packs.

• Heavy-Duty 5-Pin Hailong Interface: Built with a reinforced 5-pin connection block for lower resistance, reliable current transfer, and minimal power drop under heavy motor loads.

• Integrated Smart BMS Protection: Protects cells against overcharging, deep discharge, over-current spikes, short circuits, and thermal runaway.

• UL & CE Safety Certified: Thoroughly tested and certified to international safety standards for lithium energy storage systems.

• Key-Locking Down-Tube Cradle: Features a lockable mounting bracket that fastens directly to standard frame water bottle bosses, offering easy removal for charging.

📊 Technical Specifications Matrix