36V 7Ah Bottle Battery with Integrated 250W UK Road Legal Controller for E-Bikes
This is the smallest profile and most stealthy e-bike battery and controller combination we currently offer. The compact 36V 7Ah bottle battery houses a fully integrated 250W UK road-legal controller within its base, providing both power and control in one sleek unit. Designed for simplicity and reliability, this all-in-one solution is perfect for riders looking to convert their bike for legal road use without the complexity of programmable controllers.
Although this controller is not programmable like our Bafang or Grin Tech options, it offers seamless compatibility with Bafang 250W motors, handlebar displays, pedal assist sensors (PAS), throttles, and e-brakes — making it an ideal choice for straightforward, plug-and-play conversions.
The battery features a removable design, allowing you to detach it easily for charging indoors or to take it with you for security when locking up your bike. While it includes a key lock to secure it on the frame, as with all battery locks, it is advisable to remove the battery when leaving your bike unattended.
This unit mounts neatly to your bike using standard water bottle cage mounts, but be sure to verify the dimensions provided before purchase to ensure a proper fit on your frame.
The package includes a compatible 2A charger for safe and efficient battery charging.
SPECIFICATIONS
- Controller Model: BF-LD-HY-241
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Battery Voltage/Capacity: 36V, 7Ah
- Battery Chemistry: Lithium-ion
- Battery Cells: Samsung 35E
- Continuous Discharge Current: 15A
- Peak Discharge Current: 30A
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Controller: Integrated 250W UK road-legal (non-programmable)
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Compatibility: Works with Bafang 250W motors, displays, PAS, throttles, and e-brakes
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Removable Battery: Yes, with key lock for retention (not theft-proof)
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Charging: Includes 2A charger
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Total Weight: 1.94 kg
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Battery Weight: 1.35 kg
DIMENSIONS
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Battery: 255mm (L) × 148mm (W) × 83mm (H)
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Base/Mount: 245mm (L) × 98mm (W) × 65mm (H)
IMPORTANT NOTES
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Designed to fit standard water bottle cage mounts — please measure your frame to confirm fit.
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Always remove the battery when leaving the bike unattended for added security.
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Shipping is limited to England, Scotland, and Wales due to lithium battery regulations.

