AOAE Hailong High-Capacity Frame-Mount Lithium-Ion E-Bike Battery Series –

36V / 48V / 52V Systems (30Ah & 40Ah Capacity Options) Optimized for Bafang Motor Kits, E-Scooters, RV & Trolling Motor Builds (Integrated Smart BMS, Key-Lock Mounting Bracket & Charger Included)

Upgrade your electric bicycle or custom conversion with the AOAE Hailong High-Capacity Lithium-Ion Series. Designed around the industry-standard Hailong quick-release frame casing, this pack mounts securely onto standard downtube water bottle bosses, giving your e-bike a clean, factory-integrated appearance while keeping weight low and centered.

Engineered to power 36V, 48V, and 52V drive systems, this pack is an ideal match for Bafang mid-drive (BBS02, BBSHD) and hub motor setups. Built with high-density lithium-ion cells in 30Ah and 40Ah capacities, the AOAE Hailong series provides high-watt-hour storage for extended range, whether you are commuting across town, upgrading an RV battery setup, or powering a marine trolling motor.

⚠️ System Compatibility & Voltage Options Notice

IMPORTANT VOLTAGE & FITMENT INFORMATION:

• 36V Systems: Rated nominal 36V (charges to $42.0\text{V}$). Designed for standard 250W–500W commuter motors.

• 48V Systems: Rated nominal 48V (charges to $54.6\text{V}$). Designed for high-torque 500W–1000W setups and Bafang BBS02 kits.

• 52V Systems: Rated nominal 52V (charges to $58.8\text{V}$). Ideal for high-performance builds and Bafang BBSHD setups requiring reduced voltage sag and higher top speeds.

• Bafang Plug-and-Play Compatibility: Standard discharge wiring connects directly to popular Bafang mid-drive and hub motor harness systems.

🚀 Key High-Performance Features

• Quick-Release Hailong Frame Casing: Mounts directly to downtube frame mounts with an integrated security lock and key system for easy removal and anti-theft protection.

• Ultra-High Capacity (30Ah / 40Ah): Massively extends riding range per charge compared to standard 10Ah–14Ah factory e-bike packs.

• Bafang Motor Integration: Optimized discharge curves and wiring options engineered specifically for Bafang mid-drive motor kits and aftermarket controllers.

• Integrated Smart BMS: Built-in battery management system guards against overcharging, over-discharging, thermal overload, and short circuits.

• On-Pack LED Power Indicator: Check remaining battery charge status at the press of a button before heading out on a ride.

• CE Safety Certified: Manufactured under strict quality guidelines and verified under international European safety standards.

📊 Technical Specifications Matrix

Description

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*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: 20Ah/30Ah

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, and 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, 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 balance) 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 a 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 /;

As the battery is a special product, we will select different shipping channels based on your purchase 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 31 - 40ah. The certification is CE. Product origin: 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, overdischarging, overcurrent, and 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 providing you with exceptional products and service to enhance your electric bike experience.