JOJOCY Dual Battery Connector 20V-72V, E-Bike Parallel Module Adapter, XT60 Port Design for Dual Battery Pack Switch Balancer

What buyers think

Buyer-review evidence is limited, but the feedback that exists points to two clear themes. Many shoppers like that the connector is a straightforward way to add a second battery and gain more riding distance, and they describe the module as small enough to fit alongside common controller locations. On the other hand, there is at least one report of a mismatch between expected connector layout versus what was received, which highlights the importance of checking plug type and pin configuration before committing to an install.

How this dual battery connector works

This module is designed for parallel battery operation. In practical terms, it routes power so two battery packs can be used together rather than separately, with the goal of increasing total usable capacity. The connector design centers on an XT60-style interface, using a male plug to connect to the battery side and a female connector to connect to the controller side.

It also includes circuitry intended to help batteries behave more consistently when paralleled. The unit features voltage monitoring and an over-discharge protection behavior, intended to automatically stop output when battery voltage is too low to help prevent battery damage.

Battery and controller compatibility checklist

Before you buy, check these fit points because they directly affect safety and whether the module will integrate cleanly with your build.

1) Voltage must match

The module is intended for lithium battery packs of the same type and voltage. Do not plan on mixing different voltages. A large difference in battery voltage can cause damage, and the connector is not meant for that scenario.

2) Choose a current rating that matches (or exceeds) your controller

The module offers multiple current specifications, and the guidance is to select a module current that is at least as high as your controller current. For example, if your controller is rated for 30A, you would choose a 30A or 40A option, with extra headroom generally preferred for heat dissipation.

3) Confirm your plugs and connector layout

The module uses XT60 port design, but plug count and pin configuration details matter. If your current setup expects a specific XT60 arrangement, verify the connector layout and wiring plan to avoid a frustrating mismatch.

Pros, cons, and who it’s for

Best for

• Riders and DIY builders who already have a dual-battery compatible e-bike platform and want a cleaner path to run two packs in parallel.
• People matching two battery packs of the same voltage and lithium type, looking to extend range by increasing total capacity.
• Buyers comfortable doing careful wiring work and following safety-first installation steps.

Who should avoid it

• Anyone considering mixing battery voltages or battery types.
• Shoppers who cannot verify plug configuration and wiring compatibility before installation.
• Users who want a plug-and-play solution with no need for setup, because proper polarity confirmation and a correct wiring plan are essential.

Installation and heat considerations

Plan on installing it with both batteries turned off to reduce short-circuit or shock risk. The unit may generate heat during operation, so you should avoid touching it and ensure it’s placed where heat can dissipate.

After installation, it’s reasonable to start with a short low-load test run to confirm voltage display behavior (if present on your system) and output stability. During longer rides, periodically check that the connection is secure and that the module temperature stays within a normal range for your setup.

Price and availability

This is positioned as an aftermarket cycling electronics module with a typical direct-purchase price point, and availability can vary by listing. If you’re comparing options, focus less on headline price and more on whether the voltage range and current rating fit your specific battery and controller combination.

Verdict

The JOJOCY dual battery connector is a practical option if your goal is to increase e-bike range by running two identical-voltage lithium packs in parallel. It offers a wide 20V-72V input range, selectable current options, and built-in voltage monitoring plus over-discharge protection behavior, which are key building blocks for a safer parallel setup. Just be meticulous about choosing the right current rating, confirming connector/pin compatibility, and following the installation safety steps, since those details are where buyers can run into problems.

FAQ

How many amps should I choose for this dual battery connector?

Pick a module current that is at least as high as your controller’s current. For example, if your controller is 30A, selecting 30A or 40A options gives you headroom that can help with heat management.

Can I connect two batteries with different voltages?

No. The module is meant for batteries that share the same lithium type and voltage. A large voltage difference can cause damage to the module or batteries.

Does this module balance or equalize the batteries?

It includes an equalization approach intended to help the two batteries work more stably when connected in parallel, alongside voltage monitoring.

What should I check before installing it?

Verify both batteries match in type and voltage, choose the correct current rating for your controller, and confirm your connector layout and wiring plan so polarity and plug configuration are correct.

Does the module get hot?

It can generate heat during operation. Avoid touching it during use and give it space or airflow for heat dissipation.

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