Downtube Batteries for Electric Bikes

Q: What BMS options are available for downtube eBike battery packs?

BMS functions can be configured based on your requirements, including overcharge, over-discharge, overcurrent, short-circuit, and temperature protection. Discharge rating can also be matched to your motor power and controller current needs.

Q: How do I choose the right voltage and capacity for OEM or replacement orders?

Voltage should match the eBike system and controller requirements, while capacity is selected based on target range and power demand. For replacement programs, offering a few mainstream capacity options helps cover common needs while keeping inventory manageable.

Q: Can you customize connectors, discharge cables, and charging ports?

Yes. Connector types, cable length, discharge wiring, and charging port styles can be customized to fit different eBike platforms. This helps ensure smooth OEM integration and reduces mismatch issues in replacement supply.

Q: What is the lead time for samples and mass production?

Sample lead time depends on confirmation of the housing type, specifications, and configuration details. Mass production lead time is based on order quantity and BOM requirements, and stable scheduling can be supported for long-term OEM and replacement supply.

Explore high-performance downtube batteries for electric bikes, built for stable installation and reliable output. Our packs can be configured with EVE or Samsung cells, upgraded BMS options, and power-ready setups for demanding Australia eBike conversion riders and workshops.

OEM-friendly fit with stable mounting & locking design

Hailong and Polly downtube battery packs are built for reliable frame installation. The rail-and-lock structure is designed to support consistent assembly and stable long-term supply for OEM programs.

Replacement-ready models with clear compatibility options

These two case types are widely used in the market, making them ideal for replacement projects. Key parameters such as dimensions, rail type, and discharge requirements can be matched to help you quickly shortlist the correct battery model.

Configurable BMS for safety, power output, and system protection

BMS options can be configured based on your application needs, including overcharge/over-discharge protection, overcurrent protection, temperature protection, and discharge performance for different motor/controller combinations.

Flexible capacity range for inventory planning & model coverage

Capacity can be customized across different Ah ranges to support multiple eBike platforms. This allows you to build a product line with better coverage while keeping your SKU planning clear and manageable.

PRODUCTS

Downtube eBike Battery Models

Junda Battery offers a range of rear rack eBike battery housings and pack configurations designed for commuter and city electric bikes. This section lists common rear rack models with key specs—dimensions, voltage, capacity, cell options, and BMS features—to help buyers quickly shortlist compatible solutions for OEM programs and replacement supply.

Cannon ebike Battery Series

Haichuang Battery

Hailong Battery Series

Reention Atlas Battery

Reention Cuttle Series Battery

Reention Kirin Series Battery

Reention Thunder Series Battery

Reention Tigershark Battery

Reention Polly Battery

Replacement Batteries Available for 100+ eBike Brands

Customer Support?

+86-153-6090-3247

ISO9001 process control, traceable QC, and build consistency—ready for OEM programs.

Integrated eBike Battery

Downtube eBike Battery You Can Define

An eBike battery program stays on track when the key specs are clear from day one—voltage platform, Wh target, peak motor current, enclosure space, and charger/BMS interfaces. Defining these inputs early helps reduce fitment rework, avoid BMS cutoffs, and keep performance consistent from prototype builds to repeat orders.

18650 / 21700 Cell Supply

18650 and 21700 cells are supported with flexible sourcing options from Molicel, LG, Samsung, EVE, and DMEGC. Cell selection can be recommended based on real requirements—power demand, cycle life target, and budget—so cost stays under control without overspecifying.

50+ Models for Shops & OEM Programs

Fitment-ready pack designs cover 50+ eBike models commonly used by repair shops, distributors, and eBike factories. Housing style, mounting interface, and connector layout can be aligned to reduce installation rework and speed up replacement or upgrade programs.

100% Aging Verification

Every pack goes through 100% aging test and functional checks before shipment to reduce early failures. Global insurance coverage is provided to reinforce accountability for product quality and safety in real-world use.

Fast Lead Time with Economical Shipping Options

Fast dispatch is supported with typical lead time targets and a shipping plan chosen for cost-efficiency. Logistics options are optimized to balance delivery speed and freight cost—helping reduce both timeline pressure and landed cost.

PRODUCTION PROCESS

How We Build Downtube eBike Battery

common Questions

FAQs About Downtube eBike Battery Packs (OEM / Replacement)

How do I confirm compatibility for a downtube eBike battery?

Compatibility mainly depends on the battery housing dimensions, mounting rail structure, locking position, and connector layout. You can share photos of the original battery and base rail, and the correct matching option can be verified quickly.

Are downtube battery mounting rails interchangeable between different models?

In most cases, they are not interchangeable. Different downtube housings may use different slide rails, lock designs, and screw positions. For replacement supply, confirming the rail type is one of the most important steps before production.

What BMS options are available for downtube eBike battery packs?

BMS features can be configured based on your project requirements, including overcharge protection, over-discharge protection, overcurrent protection, short-circuit protection, and temperature protection. Discharge rating can also be matched to support different motor and controller setups.

How do I choose the right voltage and capacity for OEM or replacement orders?

Voltage should match the motor system and controller requirements, while capacity is selected based on target range and power demand. For replacement programs, offering a few mainstream capacity options helps cover more end-user needs while keeping inventory manageable.

Can you customize connectors, discharge cables, and charging ports?

Yes. Connector types, cable length, and charging port styles can be customized to fit different eBike platforms. This helps ensure smooth integration for OEM assembly and reduces mismatch issues for replacement supply.

What is the lead time for samples and mass production?

Sample lead time depends on confirmation of housing type, specs, and configuration details. Mass production lead time is based on order quantity and BOM requirements, and stable scheduling can be supported for long-term OEM and replacement supply.