Viofo EP100 Expansion Battery Review: Cross-Compatible Dash Cam Power

Introduction

Dash cam parking mode is only as useful as the battery that powers it. When a car is turned off, the camera still needs a steady power source to keep recording, and that is where dedicated battery packs come in. The Viofo EP100 is an expansion battery designed to pair with the BP100 main battery, adding extra capacity for longer parking mode sessions. What makes it interesting is that the connectors are shared across several popular battery packs, which opens up more flexibility than a typical proprietary accessory.

What Is the Viofo EP100?

The Viofo EP100 is an expansion battery designed to connect to the BP100 main battery and add additional capacity. The connection itself is simple: two wires carrying power and ground, with no data communication involved. This straightforward design means the EP100 can work with other battery packs that use the same connector standard.

The practical benefit is that owners of compatible battery packs can expand their parking mode runtime without needing to buy a whole new system. Instead of replacing the main battery, the EP100 simply adds on to what is already installed.

How the EP100 Connects to Other Battery Packs

The connectors on the EP100 are the same type used in many other battery packs. In testing, the EP100 was confirmed to work with the BlackVue B-124X, and it also connects to the BlackboxMyCar Powercell 8 through the expansion port. The connection uses the same XT60 connector found in these batteries, so pairing them is straightforward.

The setup process is simple. After turning off the Powercell 8, the EP100 plugs directly into the expansion port. When the car is started, the charging LED on the main battery lights up, and the expansion battery shows power flowing in. When the car is turned off, the main battery stops charging and the expansion battery begins discharging to keep the dash cam running.

Setting Up the Extended Capacity in the App

Once connected, the companion app needs to be updated to reflect the new total capacity. The default battery capacity shows 7,500 mAh. In the settings menu, there is an option for extended battery capacity, where the user can enter 7,650 mAh for the expansion setup. After saving, the app updates automatically to show the increased capacity.

During a drive, the app displays the charging current going into both batteries and estimates the time needed to recharge the full setup. When the car is turned off, the app switches to show the discharging state, confirming that the expansion battery is actively powering the dash cam.

Mounting the EP100 With the Included Velcro Strips

The EP100 comes with Velcro strips for mounting. The strips attach to either side of the battery, and the expansion battery can then be stacked on top of the main battery pack. This keeps the setup tidy and secure, which matters in a vehicle where space is often limited.

The stacking approach works well in practice, keeping both batteries in one place while allowing the cables to remain connected. For anyone installing this in a trunk or under a seat, the compact footprint is a practical advantage.

Buying Advice

The Viofo EP100 makes the most sense for owners of compatible battery packs who want more parking mode runtime. Because it uses the same connectors as several popular packs, it offers cross-compatibility that is rare in this category. The setup is simple, the app integration works cleanly, and the included Velcro strips make mounting easy.

Before buying, it is worth confirming that the main battery pack uses the same connector standard. The EP100 is confirmed to work with the BlackVue B-124X, the BlackboxMyCar Powercell 8, and the Viofo BP100 itself. For anyone running one of those systems, the EP100 is a practical way to extend dash cam recording time without replacing the existing setup.

Conclusion

The Viofo EP100 is a well-designed expansion battery that delivers on its core promise: adding capacity to a compatible dash cam battery system. Its simple two-wire connection, cross-compatibility with popular battery packs, and clean app integration make it a useful upgrade for parking mode users. For owners of compatible systems, it is a straightforward way to get more recording time with minimal installation effort.