Keeping your Holosun EPS Carry running reliably means paying attention to two critical components: the battery itself and the tiny screws that secure the battery tray. A loose tray or a dead cell can render your optic useless at the worst possible moment. Having the right spare parts on hand is a simple yet essential part of responsible firearm ownership and maintenance.
This roundup focuses on the practical accessories you need to ensure your optic stays powered. We’ve compiled a selection of dedicated screw kits designed specifically for the Holosun EPS Carry’s battery compartment, along with reliable, name-brand battery options. Whether you’re looking for a basic screw replacement or a multi-pack of long-lasting lithium cells, having these items in your range bag provides invaluable peace of mind.
Essential Power & Hardware for Your Holosun EPS Carry
- Screw kit for Holosun Battery Tray, Also Fits EPS/EPS Carry Models
- 8 PCS Steel Screws for Holosun Battery Tray EPS/EPS Carry
- 12Pcs Screw kit for Holosun Battery Tray | Compatible with EPS/EPS Carry Models
- 16 PCS 4 Sizes Red Dot Optic Screws kit Compatible with Holosun Battery Tray
- 8Pcs Screw Kit for Holosun Battery Tray | Note: Not for EPS and EPS Carry
- Duracell 2032 Lithium Battery, 4 Count (Pack of 1)
- Amazon Basics CR2032 Lithium Batteries, 10-Pack
- Duracell 2032 Lithium Battery, 2 Count (Pack of 1)
- Energizer 2032 Lithium Coin Battery (6 Pack)
Screw kit for Holosun Battery Tray, Also Fits EPS/EPS Carry Models
This 8-piece screw kit is a fundamental accessory for any Holosun EPS Carry owner. It is specifically engineered for a secure and reliable fit across a wide range of Holosun optics, including the EPS and EPS Carry models. The inclusion of two distinct screw sizes ensures you have the correct hardware for your specific battery tray, with M2.5 screws designated for the EPS/EPS Carry and M2 screws for other Holosun models.
Constructed from corrosion-resistant, high-quality materials, these screws are built to handle the demands of frequent use, significant recoil, and harsh environmental conditions. This focus on durable construction ensures longevity and consistent performance, preventing the frustration of a loose battery tray during critical use. The manufacturer stands behind the fit with a notable guarantee, offering a refund if you encounter any issues and provide a video of the problem.
8 PCS Steel Screws for Holosun Battery Tray EPS/EPS Carry
For a straightforward and effective solution, this set provides eight carbon steel screws designed to secure your Holosun battery tray. The package is thoughtfully organized, containing four pieces of each of the two essential sizes: M2.5 for the EPS/EPS Carry tray and M2 for other Holosun optics. A dedicated screwdriver is also included, making this an all-in-one kit for maintenance or replacement.
The screws are made from high-strength steel and feature a protective coating. This combination provides the resilience needed to withstand frequent use and exposure to harsh environments, ensuring your battery compartment remains securely fastened. This is a no-fuss, practical option for shooters who want reliable spare parts without any unnecessary extras.
12Pcs Screw kit for Holosun Battery Tray | Compatible with EPS/EPS Carry Models
This comprehensive 12-piece screw kit offers excellent value for those who prefer to have ample spares on hand. Designed for a secure fit on the Holosun EPS and EPS Carry battery trays, this set provides multiple backups, which is ideal for gunsmiths or individuals who maintain several optics. A mounting tool is included in the package, ensuring you have everything needed for installation or removal.
The screws feature a hexagonal drive head that pairs with the provided tool to offer a superior grip and increased stability during installation. This design makes the process faster and helps prevent stripping the screw heads, a common issue with smaller fasteners. The convenience of having a dedicated tool and a generous quantity of screws makes this a very practical choice.
16 PCS 4 Sizes Red Dot Optic Screws kit Compatible with Holosun Battery Tray
This is the most extensive kit in this roundup, containing 16 carbon steel screws divided across four different sizes. While it is compatible with the Holosun EPS and EPS Carry battery trays, its versatility extends to mounting certain optics on popular pistol models like the Smith & Wesson M&P 5.7, Shield, Shield Plus, and Equalizer. An Allen key is included for easy installation.
The primary benefit of this kit is its broad utility. It serves as a multi-purpose hardware solution for someone who might be mounting a new optic or needs various screw sizes for different applications. If you’re looking for a single kit that can address both battery tray security and potential mounting needs, this product offers significant value and preparedness.
8Pcs Screw Kit for Holosun Battery Tray | Note: Not Applicable to EPS and EPS Carry Series
It is crucial to note that this particular screw kit is explicitly not designed for the Holosun EPS or EPS Carry series. It is included here for clarity and to prevent an accidental purchase. This kit is intended for other popular Holosun models like the 509T, 508T, 507C, 407C, 507K, and 407K.
The kit includes eight precision-manufactured screws and a mounting tool, offering a secure fit for the battery trays of the compatible models listed. The hexagonal drive head is designed for better tool grip, promoting a stable and fast installation or removal process. This is a solid option for owners of those specific Holosun optics, but EPS Carry users should look to the other kits featured above.
Duracell 2032 Lithium Battery, 4 Count (Pack of 1)
Duracell is a trusted name in power, and this 4-pack of CR2032 lithium batteries provides a reliable energy source for your Holosun EPS Carry. These 3V cells are designed for dependability, delivering the long-lasting performance required for critical equipment like weapon-mounted optics. Having a multi-pack ensures you have spares ready for a quick swap when needed.
A significant feature of these batteries is their focus on safety. They have a non-toxic, bitter coating on both sides to help discourage swallowing, and the packaging itself is child-secure, requiring scissors to open. This makes them a responsible choice for households with children, adding an important layer of safety to your maintenance supplies.
Amazon Basics CR2032 Lithium Batteries, 10-Pack
For those seeking maximum value and a long-term supply, the Amazon Basics 10-pack of CR2032 batteries is an excellent choice. These 3-volt lithium coin cells offer reliable performance and are a direct replacement for several other battery codes, including BR2032 and DL2032. With a 225mAh capacity, they are built to provide steady power for your electronic devices.
This large pack is ideal for users who want to stock up, ensuring they have batteries not only for their red dot sight but also for other household items like key fobs or calculators. The child-proof package adds a measure of safety, making this a cost-effective and practical bulk-buy option for the prepared shooter.
Duracell 2032 Lithium Battery, 2 Count (Pack of 1)
This two-pack of Duracell CR2032 batteries is perfect for the shooter who needs a reliable spare without committing to a larger multi-pack. It offers the same trusted Duracell performance and safety features as the larger pack, including the long-lasting power and non-toxic bitter coating to help discourage swallowing.
The smaller quantity is convenient for someone who primarily needs one battery for their optic and one immediate backup to store in a range bag or grip module. The child-secure packaging ensures the batteries are stored safely until you are ready to use them, providing peace of mind and dependable power in a compact package.
Energizer 2032 Lithium Coin Battery (6 Pack)
Energizer is another industry leader known for producing long-lasting and reliable batteries. This 6-pack of CR2032 lithium coin batteries provides a solid middle ground between smaller packs and bulk options. You get enough batteries to keep your Holosun EPS Carry powered for a long while, with spares for other devices or future use.
Like its competitors, Energizer batteries are engineered for consistent performance in a wide range of devices. Choosing a brand with a strong reputation for quality ensures that your optic receives stable voltage, which is crucial for maintaining consistent brightness and reticle function. This pack size is practical for users who want to minimize how often they need to repurchase batteries.
Buying Guide: How to Choose the Best Battery for Your Holosun EPS Carry
When I first got my Holosun EPS Carry, my immediate thought was about finding the right battery to keep it running reliably. It’s not just about grabbing any cell from the store; it’s about performance, longevity, and peace of mind. The EPS Carry uses a common battery, the CR1632, but not all CR1632 batteries are created equal. Here’s what I look for when I need to stock up.
The first and most important factor is brand reputation. I stick with well-known manufacturers like Duracell, Energizer, or Panasonic. These companies have a proven track record for quality control, which is something you don’t want to gamble with for a tool you might depend on. Off-brand or generic batteries might be cheaper upfront, but they often have inconsistent performance, a shorter lifespan, and a higher chance of leaking. A leaking battery can destroy your optic from the inside, turning a small savings into a very expensive mistake.
Next, I always consider the battery’s chemistry. For the Holosun EPS Carry, you want a standard lithium CR1632. Lithium batteries are my go-to because they handle a wide range of temperatures extremely well, have a very long shelf life, and provide a consistent voltage output until they are nearly depleted. This is crucial for a red dot sight because it means your dot’s brightness will stay consistent. I avoid rechargeable CR1632 options. They often have a lower nominal voltage (3V vs 3.2V for lithium) which can lead to dimmer performance, and they don’t hold a charge as long. The convenience isn’t worth the potential compromise in reliability.
Finally, I think about sourcing. I purchase my batteries from reputable sources like major electronics stores, known online retailers, or directly from the battery manufacturer’s website. This helps avoid the risk of buying counterfeit products, which are unfortunately common. A fresh battery is also key, so I check for an expiration date on the packaging if possible. By paying attention to the brand, chemistry, and source, I feel confident that my Holosun EPS Carry will have the power it needs when it matters most. Making an informed choice on the 9 best battery options for Holosun EPS Carry optics really comes down to trusting proven names and understanding the technology that keeps your sight on target.
Frequently Asked Questions
Can I use a rechargeable battery in my Holosun EPS Carry?
I strongly advise against using a rechargeable CR1632 battery. While they exist, they typically operate at a lower voltage than the standard 3V lithium battery the optic is designed for. This can result in a noticeably dimmer reticle, especially in bright sunlight. Furthermore, their capacity is often lower, meaning you’ll be recharging them far more often than you’d be replacing a primary lithium cell. For a defensive or duty optic, the reliability and consistent performance of a quality lithium battery are non-negotiable.
How often should I change the battery in my EPS Carry?
Holosun rates the battery life for the EPS Carry at up to 50,000 hours on a medium setting. That’s years of continuous use. However, I don’t rely solely on that number. My personal practice is to replace the battery once a year, on a date I’ll remember like my birthday or the new year. This proactive habit ensures the battery is always fresh and prevents any unexpected failures. If you use the optic on a higher brightness setting frequently, you may need to change it more often.
What is the difference between a CR1620 and a CR1632 battery?
The main difference is thickness and, consequently, capacity. A CR1632 is 3.2mm thick, while a CR1620 is only 2.0mm thick. They share the same diameter. The CR1632 has a larger volume, which allows for a higher milliampere-hour (mAh) rating, meaning it will last significantly longer. You should only use the specified CR1632 in your Holosun EPS Carry. Using a thinner battery like a CR1620 could lead to poor contact and intermittent operation.
Are more expensive batteries always better for my optic?
Not necessarily, but the cheapest option is almost always worse. You don’t need to buy the most expensive, premium-branded battery, but you should absolutely avoid no-name generic cells. I’ve found that mid-priced batteries from top-tier brands like Energizer, Duracell, and Panasonic offer the perfect balance of cost and proven reliability. You are paying for their rigorous quality control, which minimizes the risk of defects and leakage that could permanently damage your sight.
Why does my new battery seem to die quickly?
If a new battery drains unusually fast, there are a few things I would check. First, ensure the battery compartment lid is sealed correctly and the o-ring is not damaged. A compromised seal can let moisture in and cause problems. Second, check the auto-brightness settings if you have the model with that feature; sometimes it can cause the dot to be brighter than needed, draining the battery. Finally, the battery itself might be old stock or a counterfeit. This is why buying from a reputable source is so critical for maintaining your equipment.