• A black Hailong 48V battery shown on a white marble surface with promotional text highlighting 10Ah, 15Ah, and 20Ah capacities and compatibility with Bafang motors.
  • Technical specifications and features of a power switch with battery level indicator and charging sockets.
  • Close-up product detail showing a 4-pin discharge port on the base and battery bottom, with text reading '4 PIN' and 'DISCHARGE PORT ON THE BASE & BATTERY BOTTOM' on a dark background.
  • Packing list graphic showing a black handheld battery, battery tray, charger, key, screws, and discharge connector with labels on a light gray background.
  • Installation guide graphic showing three panel diagrams labeled 1, a, and b for mounting a black battery pack onto a bicycle frame, plus a photo of a black electric bicycle with the battery attached.
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Charge My E-Bike

48V Ebike Battery 20Ah 15Ah 10Ah 250W 1000W 1800W

48V Ebike Battery 20Ah 15Ah 10Ah 250W 1000W 1800W

$358.53 USD
$208.53 USD $358.53 USD
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Reoaoone Hailong Long-Range E-Bike Replacement Battery Pack (36V / 48V / 52V | 10Ah / 15Ah / 20Ah | 4-Pin Base)


Power your daily urban commute, off-road singletrack adventures, or heavy-duty mid-drive conversions with the Reoaoone Hailong Down-Tube Lithium-Ion E-Bike Battery Pack. Engineered for high-demand mid-drive and hub motors—including popular Bafang BBS02, BBS03, and BBSHD systems—this versatile power core is available in 36V, 48V, and 52V architectures with capacity options ranging from 10Ah up to 20Ah (360Wh to 1040Wh). Housed in a rugged, IP65 waterproof casing and fitted with premium 18650 or 21700 lithium cells, this battery delivers consistent, low-sag power for motors from 250W all the way up to 1800W.

⚠️ Electrical System & Frame Mounting Guidelines

IMPORTANT FITMENT & SYSTEM SPECIFICATIONS:

  • Standardized 4-Pin Hailong Base: Features a heavy-duty 4-pin discharge interface designed for clean lock-in connection to the included frame-mounting cradle.

  • High-Current BMS Architecture: Integrated smart Battery Management System protects against overcharging, deep discharge, over-current draws, and short circuits under heavy acceleration.

  • IP65 All-Weather Enclosure: Sealed impact-resistant hard plastic casing protects internal cell packs from rain, road splash, and trail dust.

  • Comprehensive Global Certifications: Certified under CE, DOT, EAC, EPA, FCC, GMP, RoHS, TGA, and UL safety and quality standards, backed by a 2-Year Manufacturer Warranty.

🚀 Key High-Performance Features

  • Multiple Capacity Options (Up to 1040Wh): Choose between 10Ah (lightweight commuting), 15Ah (balanced range), or 20Ah (extreme long-distance) powered by high-density 18650 or 21700 cells.

  • Bafang Mid-Drive Optimized: Direct power match for high-torque mid-drive motors like the Bafang BBS02 (500W/750W) and BBSHD (1000W–1800W+).

  • Integrated Key Cylinder & Capacity Meter: Quickly check remaining charge via the top LED level indicator and lock the pack securely to your bike frame to prevent theft.

  • 4-Pin Quick-Release Cradle: Easy down-tube installation using standard water bottle braze-on mounts; remove the battery in seconds for convenient indoor charging.

📊 Technical Specifications Matrix

Specification Parameter Reoaoone Hailong Battery Specifications
Brand / Manufacturer Reoaoone
Model / Casing Format Hailong Style Down-Tube Frame Mount
System Voltage Options 36V / 48V / 52V DC Systems
Nominal Capacity Options 10Ah / 15Ah / 20Ah
Energy Storage Output 360Wh / 480Wh / 540Wh / 720Wh / 960Wh / 1040Wh
Cell Form Factor High-Grade 18650 / 21700 Lithium-Ion Cells
Discharge Interface 4-Pin Base Terminal Connection
Waterproof Rating IP65 Water & Dust Resistant Enclosure
Protection System Smart BMS (Overcharge, Over-Discharge, Short Circuit)
Motor Compatibility 250W / 350W / 500W / 750W / 1000W / 1800W Systems
Manufacturer Warranty 2-Year Full Manufacturer Warranty
Safety Certifications CE, DOT, EAC, EPA, FCC, GMP, RoHS, TGA, UL

📋 Ideal Applications

  • Bafang BBS02 & BBSHD Upgrades: Excellent high-discharge companion pack for 750W and 1000W+ mid-drive conversions.

  • Commuter E-Bike Range Extension: Swap out older, degraded Hailong packs for a high-capacity 20Ah battery to double daily commuting mileage.

  • Custom DIY E-Bike Builds: Clean, professional down-tube mounting for 36V, 48V, or 52V custom hub-motor or mid-drive builds.

📦 Package Contents

  • 1 x Reoaoone Hailong Lithium-Ion Battery Pack

  • 1 x 4-Pin Frame Mounting Base Cradle

  • 2 x Frame Security Keys

  • 1 x Owner Operating & Safety Manual


Reoaoone, Hailong Battery, 48V Ebike Battery, 36V Battery, 52V Battery, 20Ah Ebike Battery, 15Ah, 10Ah, Bafang BBSHD, BBS02, 1800W Battery, IP65 Waterproof
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Smart Power Infrastructure for Next-Gen Urban Transit.
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Specification：

* Brand: Aleaivy

* Battery Cell Composition: Lithium-ion A+++++ cell

* Voltage: 36 Volt /48 Volt

* Capacity (amp hours): 10Ah / 15Ah / 20Ah

* Power:0W-2000W

* OUR HOLDER Plug:4-PIN

*Energy:

360Wh(36V 10AH)/540Wh(36V 15AH)

480Wh(48V 10AH)/960Wh(48V   20AH)

*BMS: 30A(36V/48V 10Ah Battery)/40A(36V/48V 15Ah   20Ah Battery)

*Charge Temperature Range: -20°C-55°C/-4~131 ℉

*Chemical Composition: Lithium Iron Phosphate (LiFePO4)

*Discharge Temperature: -20~ 65°C/-4~149 ℉

*Maximum continuous discharge: 

30A(36V/48V 10Ah  Battery)/40A(36V/48V 15Ah 20Ah Battery)

*Type: Lithium Battery

* Peak Discharge Current :75A(30A BMS) 120A(40A BMS)

* Continuous Discharge Current : 

30A(36V/48V10Ah   Battery)/40A(36V/48V15Ah 20Ah Battery)

* Fit ebike: For 36V/48V 200W-2000W ebike Electric Bike

* Long life 1500+ deeply cycles,Quality Grade A+++++ cell, Riding time   longer than ordinary batteries.

* Built-in BMS with short-circuit, over-current, overheating, over-charge, and over-discharge protection.

 

About the Battery Lights

Press the " ON " button; the lights will turn on.

Lights-1 Red 3 Green---100%

Lights-1 Red 2 Green---75%

Lights-1 Red 1 Green---50%

Lights-1 Red 0 Green---25%(you need to charge the battery at this time)


Package List:

 

* 1 x 36V/48V 10Ah 15Ah 20Ah Hailong Battery

* 1 x Battery Fix Plate /Frame mount With Discharging Line

* 1 x 42V 2A /54.6V 2A US Charger

* 1 x 30Amp/40Amp BMS

* 2 x Keys

* 1 x Male XT60 Connector

* 1 x Female XT60 Connector

* 3 x Screws(One spare)

 

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


 











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