A black HK WEISEE DC charger adapter with a power cord and plug, shown on a white background with US and EU plug icons, a circular connector detail, and red text stating 'only 1 pcs charger NO Battery'.

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52V 48V 36V 15Ah 20Ah Battery for Bafang

$49.11

$49.11 $16.37

Shipping calculated at checkout.

HKWEISEE Hailong Long-Range E-Bike Replacement Battery Pack (36V / 48V / 52V | 15Ah / 20Ah)

Deliver continuous, heavy-duty power to your mid-drive or hub motor system with the HKWEISEE Hailong Long-Range E-Bike Lithium-Ion Battery Pack. Designed specifically for high-torque powertrains—including Bafang BBS02, BBS03, BBSHD, and Tongsheng TSDZ2 mid-drive kits—this premium battery pack comes in 36V, 48V, and 52V system voltages with high-capacity 15Ah and 20Ah options. Built with high-grade lithium-ion cells and a protective internal Battery Management System (BMS), it delivers long-lasting range and stable discharge rates for e-bikes, e-scooters, and light electric utility vehicles.

⚠️ System Compatibility & Frame Mounting Guidelines

IMPORTANT POWERTRAIN & FITMENT SPECIFICATIONS:

Universal Mid-Drive Compatibility: Direct power companion for Bafang (BBS02 500W/750W, BBS03, BBSHD 1000W+) and Tongsheng mid-drive motor kits as well as high-output hub motors.

Down-Tube Frame Mounting: Designed to mount securely onto standard water bottle cage braze-ons on bicycle down-tubes.

Multi-Application Power Source: Rugged casing architecture makes it suitable for electric bikes, e-scooters, trolling motors, and small RV aux power setups.

CE Certified Safety: Built to international safety and manufacturing standards for over-charge, over-discharge, and short-circuit protection.

🚀 Key High-Performance Features

High Energy Storage (Up to 20Ah): Enjoy extended range and reduced voltage sag under heavy load with capacity choices of 15Ah or 20Ah.
Wide Voltage Range Selection: Available in 36V, 48V, or high-voltage 52V configurations to pair perfectly with your motor controller's parameters.
Integrated BMS Protection: Safeguards internal cells against over-voltage, cell imbalance, excessive current draw, and overheating.
On-Pack LED Power Indicator & Key Lock: Monitor remaining battery capacity at a glance and secure the battery pack firmly to the mounting cradle to prevent theft.
Quick-Release Mounting Plate: Slide-and-lock frame base allows for rapid removal, enabling easy off-bike indoor charging.

📊 Technical Specifications Matrix

Specification Parameter	HKWEISEE Hailong Battery Specifications
Brand / Manufacturer	HKWEISEE
Model / Casing Format	Hailong Down-Tube Frame Mount Casing
Nominal Voltage Options	DC 36V / 48V / 52V Systems
Nominal Capacity Options	15Ah / 20Ah High-Capacity Packs
Chemistry Type	Lithium-Ion (Li-Ion)
Compatible Mid-Drive Systems	Bafang BBS02, BBS03, BBSHD & Tongsheng TSDZ2
Applications	Electric Bicycles, E-Scooters, Trolling Motors, RVs
Cell Management	Integrated Smart BMS System
Safety Certification	CE Certified
Country of Origin	Mainland China

📋 Ideal Applications

Bafang Mid-Drive Powertrains: High-capacity match for Bafang BBS02 (750W) and BBSHD (1000W+) motor conversions requiring steady current output.
Tongsheng Torque-Sensing Kits: Excellent power supply for Tongsheng TSDZ2 mid-drives, providing smooth pedal-assist response.
Long-Distance Commuting & Touring: 20Ah capacity option provides the Wh storage needed for long commutes without mid-day recharging.

📦 Package Contents

1 x HKWEISEE Hailong Lithium-Ion E-Bike Battery Pack (Selected Voltage & Ah)
1 x Frame Mounting Base Cradle
2 x Frame Security Keys
1 x User Operating & Safety Manual

Upgrade your Bafang or Tongsheng build with long-lasting Hailong power! Select your voltage and capacity options above, click Add to Cart, and order today!

HKWEISEE, Hailong Battery, 52V Battery, 48V Ebike Battery, 36V Battery, 20Ah Ebike Battery, 15Ah, Bafang BBSHD, BBS02, Tongsheng, Ebike Replacement Battery

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⚡ eBike Power Network LLC
Smart Power Infrastructure for Next-Gen Urban Transit.
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eBike Power Network LLC
8735 Dunwoody Place, Ste N
Atlanta, GA 30350

CONTACT INFORMATION
Main Office: (678) 340-4455
General Inquiries: info@ebikepowernetwork.com
Support Hours: Mon - Fri | 8:00 AM - 6:00 PM EST

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Designed for high-performance residential and commercial infrastructure deployments.
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Description

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Dear customers and friends,

Hello! Welcome to our shop:

*The battery in this store supports proxy purchasing/wholesale/group purchase!

*If you need preferential prices, please pay attention to our store and contact customer service to inform your needs; we will try our best to give you the biggest discount!

Hailong E-Bike Battery 36V 48V 52V 20Ah 30Ah BMS Electric Bicycle Downtube Lithium Battery Pack for 1000W 750W 500W 250W Motor

Lithium battery features:

1. The service life is twice as long as that of lead-acid batteries, and the weight is lighter

2. No memory effect, rechargeable, longer battery life

3. Safer and more environmentally friendly, free of heavy metals and harmful substances.

4. The built-in IC chip can prevent the battery pack from overcharging, overdischarging, overcurrent, overheating, and short circuits.

5. Avoid mechanical accidents caused by vibration.

Electric bicycle battery specifications:

Model: Sea Dragon

Nominal voltage: 36V/48V/52V

Nominal capacity: 15Ah/20Ah

Battery color: black

Applicable motor: 200w 250w 350w 500w 750w 1000w

Battery size: 370*90*110mm ±0.2mm

Standard discharge: 15A-30A, 15-30A continuous 60A peak

Battery management system functions: overcurrent protection, overdischarge protection, overcharge protection, short-circuit protection, balancing.

Lithium battery features :

1. High energy density, fast charging.

2. Lightweight, small size, no pollution, and environmental protection.

3. Long cycle life; it extends its cycle life to 600-800 cycles.

4. With a short-circuit protection function, it is safe and reliable.

5. Large overcharge tolerance, good safety performance, and longer battery life.

6. Simplifies the battery management system (BMS, such as overcharge/discharge, overcurrent, short circuit, overtemperature, and balancing) and battery charger.

Precautions :

1. Do not reverse the positive and negative poles.

2. Do not connect the battery poles to the power outlet.

3. Do not throw the battery into a fire or heater.

4. Do not use or place the battery near heat sources such as fire or heaters.

5. Do not short-circuit, overcharge, or overdischarge the battery pack.

6. Do not knock, step on, or throw the battery.

7. Do not directly solder the battery or pierce the battery with nails or other sharp objects.

8. Do not directly connect the positive and negative poles with metal objects to short-circuit the battery.

9. Do not transport or store the battery together with hairpins, necklaces, and other metal objects.

10. When charging, use a dedicated charger, constant current constant voltage (CC/CV) lithium-ion (Li+) battery charge controller.

11. Do not immerse the battery in water or seawater, and store the battery in a cool and dry environment for backup.

12. If it is left for a long time, it is recommended that the battery be charged regularly (even if it is not used), and it must be charged at least once every three months.

【 About Logistics 】

1. Some delivery logistics methods of our store are not displayed in the order details. You can check the tracking information on this website at https://www.17track.net/zh-cn /;

Because the battery is a special product, we use different shipping channels based on your order amount or product weight (some channels do not provide tracking information).

2. Due to the different shipping channels in different countries, the delivery time will vary. Generally, you can receive the goods within 10-50 days. If you can't find the tracking information, please contact online customer service. Do not worry!

IMPORTANT NOTICE: Please do not give us bad reviews. Please contact our customer service as soon as possible before giving us a bad review. We will try our best to help you solve this problem!

If you are satisfied, please give us five-star praise and encouragement. Thank you very much!

The capacity of our product is 15 - 40ah. The certification is CE. The product is original from CN (origin).

36V, 48V, 52V Hailong: the best ebike battery you can find on the market; the ebike battery will never be out of date.

To provide more power and speed for your electric bicycle. No need to worry about overcharging, over-discharging, overcurrent, or short circuits.

Durable: The battery is made of high-quality ABS material, which is durable and has a long service life.

Excellent packaging, excellent communication with the seller. Overall, a good battery.

Feel free to reach out if you have any more questions or need further information. We look forward to pro

viding you with exceptional products and service to enhance your electric bike experience.

Made with care

Great value

Elegant design

Quality materials

This product is crafted with quality materials to ensure durability and performance. Designed with your convenience in mind, it seamlessly fits into your everyday life.

We strive to process and ship all orders in a timely manner, working diligently to ensure that your items are on their way to you as soon as possible.

We are committed to ensuring a positive shopping experience for all our customers. If for any reason you wish to return an item, we invite you to reach out to our team for assistance, and we will evaluate every return request with care and consideration.