52V 25Ah Hailong Downtube Battery Samsung 21700 Cells - 50A BMS for 500W-2600W Motor - UK Stock

SKU: 52V-25AH-Samsung
£316.00£350.00
In Stock
52VVoltage
25AhCapacity
Samsung M50Cell
50ABMS
  • High Performance: Compatible with 500W - 2600W motors.
  • Premium Cells: Genuine Samsung 21700-M50 cells for reliability.
  • Smart Protection: 50A Continuous discharge
  • Complete Kit: Includes 58.8V 3A Charger & cables & 5PIN holders.
1-Year WarrantyOfficial Support
Global StockFast Shipping
30 Days ReturnPeace of Mind
CECertified
UN38.3Tested
IEC62133
UKCAMarked

Product Description

Power your ride with confidence using our 52V 25Ah Samsung Downtube Battery. Featuring premium Samsung INR21700-M50 cells, this pack offers the perfect balance of massive range, safety, and lifespan for UK e-bike enthusiasts.


🏆 Why Samsung Cells Are Worth It

Cheap batteries degrade quickly. We use genuine Samsung M50 cells (5000mAh), known for their incredible cycle life and safety.
It's the ideal upgrade for Bafang BBSHD 500-2600W kits, giving you higher top speeds and sustained power without voltage sag.


🛠️ Perfect Downtube Fitment

Designed with the classic Hailong (Polly) case, this battery mounts securely to your bike's water bottle eyelets on the downtube. The sleek design keeps the center of gravity low for better handling.


⚡ High-Discharge 50A BMS

Unlike standard batteries limited to 30A, this beast comes with a 50A Continuous BMS. This means it can easily power motors from 500W up to 2600W without overheating or cutting out.


⚠️ Fitment Check: Before purchasing, please verify your frame dimensions. Use the size chart in the image gallery or contact us if you are unsure.

Technical Specifications

cell TypeSamsung INR21700-M50 (5000mAh)
configuration14S 5P (14 Series, 5 Parallel)
nominal Voltage52V
nominal Capacity25Ah (1300Wh)
bms Rating50A Continuous
output PowerSupports 500 to 2600W Motors
charging Voltage58.8V
discharge Cutoff42V
connectorXT60
battery Pack Size368*95*150mm
weightApprox. 8kg