Chamrider Custom Downtube E-Bike Battery Case Enclosure Kit – Heavy-Duty DIY Housing with Precision Nickel Strips for 21700 Cell 10S4P (36V) & 13S3P (48V) Builds

Build your own high-output, professional-grade electric bicycle battery pack with total confidence. The Chamrider Downtube E-Bike Battery Case Kit is an empty, heavy-duty battery housing engineered specifically for custom cell builders, fleet technicians, and DIY e-bike enthusiasts using high-energy density 21700 lithium-ion cells. Precision-molded to mount cleanly onto standard frame water bottle bosses, this enclosure accommodates popular configuration layouts including 10S4P (36V nominal) and 13S3P (48V nominal).

Complete with custom-cut, high-conductivity nickel strips, structural cell spacers, an integrated mechanical lock keyway, and an external LED power level indicator, this kit gives you all the core structural hardware needed to assemble a clean, reliable downtube battery pack.

🚀 Key High-Performance Features

Optimized for 21700 Lithium Cells: Precision interior dimensioning designed specifically to house high-capacity 21700 battery cells without tight squeezing or loose rattle.
Versatile Circuit Topology Support: Perfect for building high-efficiency 36V (10S4P - 40 cells) or 48V (13S3P - 39 cells) custom power packs tailored to your motor setup.
Precision Pre-Cut Nickel Strips Included: Comes complete with low-resistance nickel connection strips designed to streamline spot-welding and optimize high-current discharge.
Rugged Impact-Resistant ABS Shell: Engineered with a thick, shock-absorbing polymer casing that protects internal cells from trail vibrations, gravel strikes, and weather exposure.
Integrated Locking Mounting Rail: Features a secure frame-mounting baseplate with dual key locking mechanism to keep your battery locked tight to the frame and prevent theft.
Built-in Charge Port & LED Battery Indicator: Pre-molded cutouts for standard charging jacks, key switches, and a multi-segment LED state-of-charge readout.

📊 Hardware Specifications & Architecture Blueprint

Verify your configuration needs before starting your custom battery assembly:

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.