Red Dot Battery Change: Easy for one… Painful on the other 😬 | Trijicon RMR vs Holosun EPS Carry

February 2, 2026

Discover the ease and challenges of changing batteries in the Trijicon RMR and Holosun EPS Carry red dot sights.

Quick Look

Category

Optics, Firearms, Concealed Carry

Brand

Trijicon & Holosun

Product

Red Dot Sights

Use Case

Battery Replacement

Overview

In the world of concealed carry, reliability is everything. One often-overlooked aspect of maintaining this reliability is ensuring that your red dot sight has a fresh battery. In this article, we’ll dive into the battery change process for two popular red dot sights: the Trijicon RMR and the Holosun EPS Carry. While both serve the essential function of providing quick target acquisition, their battery change processes could not be more different.

What This Video Demonstrates

The video showcases a hands-on approach to changing the batteries of both optics mounted on handguns—specifically, the Trijicon RMR on a Glock 19 and the Holosun EPS Carry on a SIG P365 X-Macro. The presenter guides viewers through the detailed steps involved in each battery replacement, highlighting the convenience of the Holosun setup versus the more complex Trijicon system.

Step-by-Step Explanation

Starting with the Trijicon RMR, the first step is to ensure that the firearm is clear. The optic attaches to the slide of the Glock 19 using screws that also cover the battery compartment. To access the battery, the presenter has to remove the optic entirely, which involves careful handling to avoid stripping the screws.

Once the screws are out, the next step is to remove a protective plate to access the battery compartment, which reveals the CR2032 battery. The process involves careful attention to orientation while installing the new battery. After replacing the battery, reassembling the optic and securing it back onto the slide is critical to ensure it retains its zero. Thread-locking compound is used on the screws to prevent them from loosening over time.

On the other hand, changing the battery in the Holosun EPS Carry is a breeze. The presenter simply removes a single screw to access a sliding battery tray. This design allows for easy battery replacement without needing to remove the optic from the firearm. The convenience of this system is emphasized, making it clear that the Holosun winner in terms of user-friendliness.

Key Tips

• Always ensure your firearm is clear before starting any work.
• Make sure to have the correct tools on hand—a torque wrench can help prevent over-tightening.
• Use thread-locking compound where necessary to keep screws secure.
• Familiarize yourself with your optic's battery change process to avoid surprises.

Key Takeaways

Maintaining reliable optics is a crucial aspect of responsible firearm ownership. The Trijicon RMR, while perhaps more labor-intensive in replacing its battery, is regarded for its durability and toughness. On the other hand, the Holosun EPS Carry shines with its straightforward battery access, making it an attractive option for those who prioritize ease of maintenance. Ultimately, knowing how to effectively manage battery changes for your optics is essential in ensuring they're always ready when you need them.