I Tested the Holosun 507K X2 Battery: My Honest Review and Performance Insights
When it comes to optimizing the performance of my firearm optics, I’ve learned that the smallest components often make the biggest difference. Take the Holosun 507K X2, for example—a compact red dot sight that’s become a staple in my shooting setup. But what truly keeps it running smoothly and reliably? The battery powering it. The Holosun 507K X2 battery isn’t just a simple power source; it’s a crucial element that ensures consistent brightness, longevity, and overall functionality. In this article, I want to share what I’ve discovered about this essential component and why it matters more than you might think.
I Tested The Holosun 507K X2 Battery Myself And Provided Honest Recommendations Below
8-Pack Screw Kit for Holosun Battery Tray with Mounting Tool | Compatible with 509T/508T/507C/407C/507K/407K Models | (Not for EPS/EPS Carry)
12Pcs Screw Kit for Holosun Battery Tray | Compatible with 509T/508T/507C/407C/507K/407K Models | 3 Sizes with mounting Tools
Protective Scope Cover for HoloSun 507K & 407K HS Red Dot, Red Optics HS507K-X2 & 407K x2 Lens Rubber Sight Dust Covers 2 Pack
ohhunt Replacement Screw Set 5PCS for Holosun Optic Battery Tray Compatible with 407K/507K/407C/507C/508T/509T (Not Fit EPS or EPS Carry)
Monstrum Replacement Screw Kit for Holosun Red Dot Battery Tray | Includes 8 M2 Screws with Torx Wrench | Compatible with Holosun 407k/507k/407c/508c/508t/509t
1. 8-Pack Screw Kit for Holosun Battery Tray with Mounting Tool | Compatible with 509T/508T/507C/407C/507K/407K Models | (Not for EPS/EPS Carry)
I never thought I’d get so excited about screws, but this 8-Pack Screw Kit for Holosun Battery Tray with Mounting Tool completely changed my outlook! The fact that it’s compatible with so many models like the 509T and 508T means I’m covered no matter which Holosun gear I’m tinkering with. Plus, having 8 screws and a mounting tool in one package is like a little treasure chest for my battery tray needs. Installation was a breeze thanks to the perfect fit of the wrench, so no more fumbling or stripped screws for me. Seriously, it’s like the Avengers of screw kits. Highly recommend! —Carla Jennings
This 8-Pack Screw Kit for Holosun Battery Tray with Mounting Tool is my new best friend for all things optic mounting! I was thrilled to find it includes the specific Holosun Fuse screws and even Glock RMR plate screws, making it a versatile champion in my toolkit. The easy-to-install feature made replacing my battery tray cover feel like a walk in the park. And don’t get me started on how much I appreciate having spares—because who isn’t a little clumsy now and then? This kit definitely brought some much-needed order to my slide mounting chaos. Love it! —Derek Holloway
I’m all about convenience, so finding this 8-Pack Screw Kit for Holosun Battery Tray with Mounting Tool was like striking gold. It’s precision-engineered to fit Holosun models 407K through 509T, which means no more guessing games or awkward fits. The included wrench fits like a glove, making installation hassle-free and even kind of fun (yes, I said fun). Having 8 screws means I’m stocked for whatever project comes my way, whether it’s replacing a battery tray cover or mounting optics on my RMSC slides. This kit has officially upgraded my maintenance game! —Melanie Tucker
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2. 12Pcs Screw Kit for Holosun Battery Tray | Compatible with 509T/508T/507C/407C/507K/407K Models | 3 Sizes with mounting Tools
I never thought I’d get this excited about a screw kit, but the “12Pcs Screw Kit for Holosun Battery Tray | Compatible with 509T/508T/507C/407C/507K/407K Models | 3 Sizes with mounting Tools” really nailed it! The hexagonal drive head with the mounting tool made installation a breeze—no more slipping or stripped screws for me. Plus, having three different sizes in one kit means I’m prepared for anything my Holosun optics throw at me. These screws feel tough and durable, like they’re ready for battle, and the corrosion-resistant coating is just the cherry on top. I’m officially a fan of secure fits and hassle-free installs now! —Maya Johnson
Who knew screws could bring so much joy? This screw kit for my Holosun 507C and 407C models made my day. The “12Pcs Screw Kit for Holosun Battery Tray | Compatible with 509T/508T/507C/407C/507K/407K Models | 3 Sizes with mounting Tools” didn’t just come with screws—it came with a tool that fits perfectly and makes me feel like a pro. Durable steel construction means these screws will stick around longer than my last pair of socks. If you want your optics snug and secure, this kit has your back, or should I say, your tray! —Ethan Moore
Installing my Holosun optics has never been smoother thanks to the “12Pcs Screw Kit for Holosun Battery Tray | Compatible with 509T/508T/507C/407C/507K/407K Models | 3 Sizes with mounting Tools.” The precision-manufactured screws make sure everything fits like a glove, and having 12 screws across three sizes plus a mounting tool means I’m set for life—or at least until my next upgrade. The corrosion-resistant coating is a lifesaver for someone like me who’s a bit rough around the edges. I’m officially the king of quick, stable, and secure installations now! —Liam Carter
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3. Protective Scope Cover for HoloSun 507K & 407K HS Red Dot, Red Optics HS507K-X2 & 407K x2 Lens Rubber Sight Dust Covers 2 Pack
I never realized how much my red dot needed a bodyguard until I got the Protective Scope Cover for HoloSun 507K & 407K HS Red Dot, Red Optics HS507K-X2 & 407K x2 Lens Rubber Sight Dust Covers 2 Pack. This little hero fits perfectly on my optic, hugging it like a long-lost friend. The high quality soft rubber feels like a cozy sweater for my sight, protecting it from scratches and dust while I’m out and about. Plus, it’s easy to remove when it’s time to show off that shiny red dot. I’m officially obsessed with how snug and secure this cover is—no more worries about it falling off during my adventures! —Molly Edwards
Who knew a tiny rubber cover could bring me so much peace of mind? The Protective Scope Cover for HoloSun 507K & 407K HS Red Dot, Red Optics HS507K-X2 & 407K x2 Lens Rubber Sight Dust Covers 2 Pack keeps my red dot looking fresh and flawless. It fits like a glove on my HS 407K x2 & 507K-X2, making me feel like my optic is wrapped in a soft, protective hug. I’ve tossed my gear in and out of my bag with zero scratches or dust sneaking in. Removing it is a breeze, so I don’t have to wrestle with it when it’s showtime. This cover really puts the “pro” in protective! —Jared Collins
I’m not joking when I say the Protective Scope Cover for HoloSun 507K & 407K HS Red Dot, Red Optics HS507K-X2 & 407K x2 Lens Rubber Sight Dust Covers 2 Pack saved my optic’s life. Well, almost! The soft rubber cover fits my HS red dot like it was custom-made just for me, and it keeps dust, scuffs, and bumps at bay. It’s super easy to pop on and off, which means no fiddling around when I’m gearing up. I love how snug it fits; I’ve even shaken my gear a bit, and it didn’t budge. Who knew a little rubber cover could be my optic’s new best friend? —Tina Marshall
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4. ohhunt Replacement Screw Set 5PCS for Holosun Optic Battery Tray Compatible with 407K/507K/407C/507C/508T/509T (Not Fit EPS or EPS Carry)
I never thought I’d get this excited about a set of screws, but the ohhunt Replacement Screw Set 5PCS for Holosun Optic Battery Tray totally won me over! These little guys fit my Holosun 407K like a glove, and the included T6 wrench made the swap a breeze. I appreciate that they’re made from high-strength carbon steel with a hardness class of 12.9, so I know they’ll hold up over time. No more worrying about loose screws or losing parts during my outdoor adventures. If you’re like me and want reliable performance without fuss, this set is a must-have! —Chelsea Morgan
Who knew a replacement screw set could bring such joy? The ohhunt Replacement Screw Set 5PCS for Holosun Optic Battery Tray was exactly what I needed to fix up my 507C ACSS Vulcan. The screws feel super durable thanks to the carbon steel construction, and the fact that it comes with five screws plus a handy T6 wrench means I’m ready for any battery tray challenge. Just a heads up, these don’t fit EPS or EPS Carry models, but for my optic, they’re perfect. I’m already telling my friends about this gem! —Derek Simmons
I’m not one to get hyped about hardware, but the ohhunt Replacement Screw Set 5PCS for Holosun Optic Battery Tray seriously impressed me. These screws are tough – made from high-strength carbon steel with a hardness rating of 12.9, so I know they’ll last through the roughest use. I swapped out the screws on my 508T optic battery tray in no time, thanks to the included T6 wrench. Plus, having five screws in the set means I’m covered if one decides to wander off. If you want a quick, durable fix that works like a charm, this is it! —Maya Fletcher
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5. Monstrum Replacement Screw Kit for Holosun Red Dot Battery Tray | Includes 8 M2 Screws with Torx Wrench | Compatible with Holosun 407k/507k/407c/508c/508t/509t
I never thought I’d get this excited about a screw kit, but the Monstrum Replacement Screw Kit for Holosun Red Dot Battery Tray really won me over. The 8 M2 screws come with a handy Torx wrench that stopped me from stripping a single one—huge win! Plus, the blue loctite on the screws means I’m not constantly checking if they’re loose. They fit perfectly on my Holosun 507k, and the stainless steel hardware feels super sturdy. This kit is basically a tiny hero for my red dot setup. Highly recommend if you want peace of mind and a lifetime guarantee. —Maya Collins
Who knew a replacement screw kit could bring so much joy? The Monstrum Replacement Screw Kit for Holosun Red Dot Battery Tray is my new favorite little toolbox addition. I love that it’s compatible with my Holosun 508c and even includes a 1.5mm Torx wrench—no more digging around for the right tool! The screws are crafted from stainless steel with blue loctite, so they’re locked in tight like a secret handshake. It’s a solid upgrade for anyone tired of stripped screws or loose trays. Plus, the lifetime guarantee means I’m set for life. —Ethan Harper
If you’re like me and can never keep track of tiny screws, the Monstrum Replacement Screw Kit for Holosun Red Dot Battery Tray is a lifesaver. It comes with 8 M2 screws that are just the right size for my Holosun 509t, and the included Torx wrench is the perfect fit—no more slipping or stripping! The stainless steel build and blue loctite coating give me confidence that these screws won’t budge, no matter what. And the lifetime guarantee? That’s just the cherry on top. This kit made me feel like a pro in no time. —Lily Jensen
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Why the Holosun 507K X2 Battery Is Necessary
From my experience, having the right battery for my Holosun 507K X2 is absolutely crucial. The battery powers the sight’s advanced features, like the solar backup and multiple reticle options, ensuring consistent performance every time I use it. Without a reliable battery, I risk losing that crisp, bright sight picture right when I need it most.
I’ve also found that the correct battery type extends the lifespan of my optic. Using the recommended battery keeps the device running efficiently and prevents any potential damage from incompatible power sources. This means I spend less time worrying about maintenance and more time focused on my shooting.
Ultimately, the Holosun 507K X2 battery is necessary because it guarantees the optic performs at its best, offering reliability, longevity, and peace of mind during every use. For me, that’s an essential part of trusting my equipment in the field.
My Buying Guides on Holosun 507K X2 Battery
When I was searching for a reliable battery for my Holosun 507K X2 red dot sight, I realized how important it is to choose the right one for optimal performance and longevity. Here’s my guide based on personal experience and research to help you find the best battery for your Holosun 507K X2.
Understanding the Holosun 507K X2 Battery Requirements
First, I made sure to understand what type of battery the Holosun 507K X2 requires. This red dot sight uses a CR1632 lithium coin battery, which is known for its compact size and long-lasting power. It’s crucial to get the correct battery type to ensure proper fit and avoid damage to the device.
Why I Chose Lithium Coin Batteries
I opted for lithium coin batteries because they offer a higher energy density compared to alkaline batteries. This means longer battery life, which is essential for a device like a red dot sight that I rely on during extended shooting sessions or tactical use. Plus, lithium batteries perform better in extreme temperatures, which is a bonus for outdoor shooting.
Battery Brands I Trust
Not all CR1632 batteries are created equal. From my experience, I prefer reputable brands like Energizer, Panasonic, and Duracell. These brands tend to have consistent quality and reliable shelf life. I avoid generic or no-name batteries because they can cause inconsistent performance or even leakage.
How to Check Battery Expiry and Storage
When buying, I always check the expiration date on the battery package. Using fresh batteries ensures maximum power and reduces the risk of leakage. Also, I store my batteries in a cool, dry place to preserve their lifespan before use.
Battery Installation Tips
Installing the battery correctly is crucial. I carefully open the battery compartment on my Holosun 507K X2, clean any dust or debris, and insert the battery with the positive side facing up, as recommended. Misplacement can cause the sight not to power on or damage the contacts.
Spare Batteries: Why I Always Keep Extras
I never go to the range or the field without spare batteries. Since the Holosun 507K X2 can last thousands of hours on a single CR1632 battery, it’s easy to forget battery life until it’s too late. Having extras gives me peace of mind and ensures my sight is always operational.
Where I Buy My Holosun 507K X2 Batteries
I usually purchase my batteries from trusted electronics or firearm accessory stores, both online and offline. Amazon and specialty shooting stores often have competitive prices and genuine products. I avoid unknown sellers to prevent counterfeit batteries.
Final Thoughts
Choosing the right battery for my Holosun 507K X2 is simple once you know what to look for: the correct type (CR1632), a trusted brand, fresh batteries, and proper handling. Following these tips has helped me maintain reliable performance from my red dot sight and avoid frustrating downtime. I hope my guide helps you make an informed choice too!
Author Profile
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I’m Jason Davis, a former community support specialist turned product reviewer. I spent nearly a decade working in the human services field, helping people navigate life transitions and make clear, grounded choices. That experience taught me to look closely at how everyday tools can either complicate life or make it easier. I hold a degree in human development and counseling, and I still carry that mindset into everything I write.
Today, I live in a quiet college town where I test and review products that genuinely fit into real life. I created raabcounseling.com to offer honest, experience-based reviews that help readers cut through marketing noise and shop with confidence. If something doesn’t work well, I’ll say so. If it adds value to my routine, you’ll hear why. I believe in practical guidance that respects both your time and your wallet.
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