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36V Downtube E-Bike Batteries

Priority Shipping

Delivery in 1-5 working Days

ECO

100% ECO

In-home Setup

Use our conversion kit and a battery pack to transform your push bike into a powerfuull eBike

Warranty and Return

12 months warranty and 30 days return

36V Lithium Downtube Batteries — Lightweight & Reliable Power for Standard eBike Systems

Our 36V lithium downtube batteries are the entry-level voltage standard for eBike conversions — lightweight, widely compatible, and well-suited to 250W–500W hub motors and Bafang BBS01B mid-drive systems running at standard UK road-legal output. Downtube mounting keeps the pack tucked neatly along the frame, making them a practical choice for hybrid, city, and step-through builds where weight and aesthetics matter as much as raw performance. Available in capacities from 10Ah to 15Ah to suit shorter commutes and leisure rides. If you’re upgrading from a 36V system to 48V or 52V for more range and torque, contact us — we can advise on whether your existing motor and controller will support the step up.

We install it for you!

🔧 Workshop fitting available — Drop your bike in, we handle the full install and UK-legal programming

Fast delivery!

⚡ UK next-day delivery — All kits dispatched from UK stock

Awesome Support!

📋 Free compatibility check — Message us your frame details before you order