A 48V 20Ah lithium-ion battery shown upright on a white background with overlaid dimension lines and large yellow text reading '48V 20Ah Only1 batte'. The battery is black with a green and white label and a small key attached near the top.

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48V / 52V Folding E-Bike Replacement Battery Pack

$351.53

$351.53 $151.53

Shipping calculated at checkout.

Nunuoey Haiba Style Folding E-Bike Replacement Battery Pack (48V / 52V – Up to 30Ah) – High-Capacity Internal Frame Power Solution for 250W–1000W Motors

Power your folding electric bike, e-scooter, or custom build with the Nunuoey Haiba Style Folding E-Bike Lithium-Ion Battery Pack. Custom-designed to fit inside compatible folding bike central frame channels, this hidden power supply provides clean aesthetics, low center-of-gravity weight distribution, and extended commute mileage.

Constructed with premium high-density 18650 lithium-ion cells and protected by an integrated Smart Battery Management System (BMS), the Haiba pack ensures steady current delivery without voltage drop under heavy motor loads. Available in standard 48V and high-performance 52V options with capacities ranging from 20Ah to 30Ah, it is built to support motors rated from 250W up to 1000W.

⚠️ Critical Battery Dimensions & Compatibility Notice

IMPORTANT FITMENT CHECK BEFORE ORDERING:

Casing Style: Haiba Internal Frame Type

Physical Dimensions: 390 mm x 135 mm x 90 mm (approx. 15.35" L x 5.31" W x 3.54" H).

Please measure your original battery housing dimensions and verify internal frame channel clearance before placing your order to ensure perfect fitment.

🚴 Broad Application & Motor Compatibility

Folding Electric Bikes: Ideal fit for internal frame slots on folding e-bikes, step-through utility models, and commuter bicycles.
Motor Range: Fully compatible with 250W, 350W, 500W, 750W, and 1000W geared hub, direct drive, and mid-drive motor kits.
Multi-Use Power: Suitable for high-drain e-scooters, trolling motors, and custom mobile power setups.

🚀 Key High-Performance Features

Expanded 20Ah – 30Ah Capacity Options: High amp-hour storage gives you maximum range between charges for extended daily commutes and long rides.
48V Standard & 52V Upgrade: Choose 48V for factory replacement or step up to 52V for improved acceleration and top-end speed on 52V-compatible controllers.
Integrated Smart BMS: Built-in protection circuit prevents overcharging, over-discharging, current surges, short circuits, and thermal buildup.
Internal Frame Protection: Encased in a rugged housing that shields internal 18650 cells against frame vibration, road impact, and moisture.
Fold-Away Carry Handle & Key Lock: Features an integrated extraction handle for easy removal and a key security system to lock the pack inside your bike frame.

📊 Technical Specifications Matrix

Specification Parameter	Nunuoey Haiba Battery Specifications
Brand Designation	Nunuoey
Casing Style / Type	Haiba Style Folding Internal Battery
Physical Dimensions	390 mm x 135 mm x 90 mm
Nominal Voltage Options	48V or 52V
Capacity Options	20Ah / 25Ah / 30Ah
Cell Format	Grade-A 18650 Lithium-Ion Cells
Motor Compatibility	250W, 350W, 500W, 750W, 1000W Motors
BMS Protection	Built-in Smart BMS Board
Safety Certifications	CE Certified
Hazardous Chemical Registry	`High-concern chemical: None`

⚙️ Installation & Operation Guidelines

Physical Measurement: Confirm your bike's internal top-tube frame cavity fits the 390mm x 135mm x 90mm profile.
Key Operation: Turn the key to the unlocked position, slide the battery completely into the frame channel, and switch the key to the locked/power-on position.
Charging Protocol: Plug the dedicated charger output into the battery charge port before connecting to an AC wall outlet. Use a 54.6V charger for 48V packs or a 58.8V charger for 52V packs.

📦 Package Contents

1 x Nunuoey Haiba Style Lithium-Ion Battery Pack (Choice of Voltage & Capacity)
2 x Anti-Theft Safety Lock Keys
1 x Discharge Power Interface Cable

Restore or upgrade your folding e-bike's power system today. Select your voltage and capacity options below, click Add to Cart, and order now!

Haiba internal frame ebike replacement battery pack showing key lock and carry handle

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.