24v 36v Hailong Down Tube Lithium ion Battery for Ebike with USB Connector

Hailong Down Tube Lithium-Ion E-Bike Battery with USB Connector

The "Hailong" battery is one of the most popular and versatile battery types for e-bikes, particularly for conversion kits and custom builds. Named after its distinctive case design, it mounts securely to the bike's downtube, offering a clean, integrated, and well-balanced look. A key feature of many newer Hailong batteries is the inclusion of a convenient USB connector, adding a layer of utility for modern riders.

Core Specifications:

• Voltage: Available in two common voltages:

  • 48V: Ideal for lower-power e-bikes and conversion kits (typically 500W-1000W motors), providing a smooth and efficient pedal-assist experience.

  • 36V: The most common standard for a wide range of e-bikes, providing a great balance of power and efficiency for motors from 250W to 750W.

• Capacity: Capacities can vary widely based on the specific cell configuration. Common capacities include:

  • For 48V: 13Ah to 17.5Ah 20Ah

  • For 36V: 10.4Ah, 13Ah, 14Ah, 17.5Ah, and higher

• Energy Rating (Wh): The Watt-hour rating indicates the total energy capacity and potential range. For a 36V 14Ah battery, the energy rating is $36V\times 14Ah=504Wh$, which provides a significant range.

• Cell Type: The batteries are typically built with high-quality lithium-ion cells, often 18650 or the newer, higher-capacity 21700 cells from reputable manufacturers like Samsung, LG, or Panasonic.

• Configuration: The internal cell arrangement is designed to match the voltage and capacity. For a 36V pack, the configuration is generally a 10-series setup (10S), with parallel strings (e.g., 10S4P for a 14Ah pack) to achieve the desired capacity.

Key Features:

• Durable Hailong Case: The hard plastic case is designed to be robust and weather-resistant, protecting the internal battery cells from impacts, dirt, and water splashes. It has a sleek profile that blends well with most bicycle frames.

• Downtube Mounting: The battery comes with a mounting cradle that bolts directly to the bike's frame using the standard water bottle cage screw holes. This mounting style ensures a low center of gravity for improved handling and stability.

• Integrated USB Connector: A standout feature, the built-in USB port (typically 5V 1A output) allows you to charge a smartphone, GPS device, or other USB-powered gadgets directly from the battery while you ride. This is an essential convenience for commuters and long-distance touring cyclists.

• Security & Convenience: The battery pack locks securely to the mounting cradle with a key, providing an anti-theft deterrent. It can be quickly unlocked and removed for off-bike charging, storage, or for transporting the bike without the battery.

• LED Power Indicator: A multi-color or LED indicator on the battery itself provides a quick and easy way to check the remaining charge level at a glance.

• Advanced Battery Management System (BMS): An internal BMS is crucial for safety and longevity. It protects the battery from:

  • Over-charging

  • Over-discharging

  • Over-current

  • Short circuits

  • Overheating

• Wide Compatibility: The Hailong battery is a universal solution compatible with a broad range of e-bike conversion kits and motors, including popular brands like Bafang and Tongsheng. It typically comes with common connectors (e.g., XT60, Anderson, etc.) to fit various motor controllers.