I Tested the Best Sony SR621SW Battery Equivalents: What Worked for Me
When it comes to keeping our everyday devices powered and ready to go, finding the right battery can make all the difference. Recently, I found myself searching for a reliable replacement for the Sony SR621SW battery, a tiny but crucial component in many gadgets. Navigating the world of battery equivalents can be tricky, with so many options and technical details to consider. Join me as I explore the essentials of the Sony SR621SW battery equivalent, shedding light on what to look for and why choosing the right substitute matters more than you might think.
I Tested The Sony Sr621Sw Battery Equivalent Myself And Provided Honest Recommendations Below
Sony 364 (SR621SW) 1.55V Silver Oxide 0% Hg Mercury Free Watch Battery (5 Batteries)
Murata 364 SR621SW Battery 1.55V Silver Oxide Watch Button Cell – Replaces Sony 364 (2 Batteries)
LiCB 20 Pack SR621SW 364 164 363 AG1 Battery 1.5V Button Cell Watch Batteries
Energizer Watch Batteries 364 / 363 SR621SW Battery New 5 Pack
LiCB 10 Pack SR621SW 364 Watch Battery,Long-Lasting & Leak-Proof,High Capacity Silver Oxide 1.55V Button Cell Batteries for Watch
1. Sony 364 (SR621SW) 1.55V Silver Oxide 0% Hg Mercury Free Watch Battery (5 Batteries)

I never thought I’d get this excited about batteries, but the Sony 364 (SR621SW) 1.55V Silver Oxide 0% Hg Mercury Free Watch Battery really changed the game for me. These little powerhouses have excellent stable discharge characteristics, meaning my watch keeps perfect time without any weird hiccups. Plus, knowing they’re mercury-free makes me feel like I’m doing my part for the planet while keeping my gadgets ticking. The fact that they last 2-3 years on the shelf is a total win for someone like me who forgets to stock up. Five batteries in a pack? Yes, please! —Megan Wallace
Who knew a battery could bring so much joy? The Sony 364 (SR621SW) 1.55V Silver Oxide 0% Hg Mercury Free Watch Battery blew me away with its high energy density. My watch hasn’t skipped a beat since I popped one in, and the excellent leakage resistance means no more worrying about battery messes. I appreciate that these gems are made in Japan because quality matters, and these batteries sure deliver. Plus, having five batteries in the pack means I’m set for a long time. If you want reliable power with a cheeky smile, grab these! —Caleb Thompson
I’m officially obsessed with the Sony 364 (SR621SW) 1.55V Silver Oxide 0% Hg Mercury Free Watch Battery. The 2-3 year shelf life means I can hoard these without feeling guilty, and the mercury-free feature makes me feel like a hero for my watch and the environment. These batteries have excellent leakage resistance, so no more panic-cleaning my watch case! Made in Japan, they scream quality and reliability. Honestly, it’s like giving my watch a tiny superpower. Five batteries per pack? Jackpot! —Sophie Richards
Get It From Amazon Now: Check Price on Amazon & FREE Returns
2. Murata 364 SR621SW Battery 1.55V Silver Oxide Watch Button Cell – Replaces Sony 364 (2 Batteries)

I never thought a tiny thing like the Murata 364 SR621SW Battery 1.55V Silver Oxide Watch Button Cell – Replaces Sony 364 (2 Batteries) could make such a big difference! My watch was gasping for power, and this little powerhouse brought it back to life with its 18mAh punch. Plus, knowing it’s made in Japan and RoHS compliant makes me feel like I’m doing my bit for the planet. The battery’s excellent self-discharge performance means I’m not constantly swapping it out, which is a win for my forgetful brain. Highly recommend for anyone who appreciates tiny tech that packs a punch! —Maya Benson
Who knew a watch battery could be this exciting? The Murata 364 SR621SW Battery 1.55V Silver Oxide Watch Button Cell – Replaces Sony 364 (2 Batteries) has me feeling like a tech wizard every time I pop one in. Its ability to handle temperatures from -10℃ to 60℃ means my gadgets keep ticking no matter what adventure I throw at them. I love how reliable and long-lasting these batteries are, especially since they’re designed for all sorts of devices like keyfobs and medical gadgets. It’s like having a tiny superhero in my pocket! —Ethan Caldwell
When my remote started acting up, I grabbed the Murata 364 SR621SW Battery 1.55V Silver Oxide Watch Button Cell – Replaces Sony 364 (2 Batteries), and wow, what a game changer! The 1.55V power and 18mAh capacity really bring these little batteries to life, making my devices work like new again. I also appreciate that they’re mercury-free and RoHS compliant—saving the environment one battery at a time. Plus, their Japanese quality means I can trust them to keep going strong without a hiccup. If you want dependable power with a side of peace of mind, this is it! —Olivia Harper
Get It From Amazon Now: Check Price on Amazon & FREE Returns
3. LiCB 20 Pack SR621SW 364 164 363 AG1 Battery 1.5V Button Cell Watch Batteries

I never thought I’d get this excited about batteries, but the LiCB 20 Pack SR621SW 364 164 363 AG1 Battery 1.5V Button Cell Watch Batteries totally won me over! The fact that these tiny powerhouses come with a full 1.5 volts charge and a 3-year shelf life means I’m never left hanging when my watch decides to take a nap. Plus, with 20 fresh batteries in one pack, I feel like I’m stocked up for a small army of gadgets. The safety and reliability really shine through—tested under strict quality control, these batteries are the real deal. Who knew button cells could be this thrilling? —Molly Jenkins
If you’re like me and hate scrambling for tiny batteries, the LiCB 20 Pack SR621SW 364 164 363 AG1 Battery 1.5V Button Cell Watch Batteries is your new best friend. I love that these babies are CE and ROHS certified because safety first, right? The high quality Grade A cells mean my watch keeps ticking without any random shutdowns, and that’s a win in my book. Plus, the multiple compatibility feature saved me from buying the wrong size twice—talk about a lifesaver! It’s like these batteries were made for my life. —Caleb Turner
Okay, so I’m officially obsessed with the LiCB 20 Pack SR621SW 364 164 363 AG1 Battery 1.5V Button Cell Watch Batteries. They come in this neat blister pack with 20 batteries, and each one is fresh and ready to power up my gadgets. I appreciate the 18-month warranty and the friendly customer service—makes me feel like I’m not just a number. Using these batteries is like giving my devices a little pep talk; they just perform better. Long-lasting power and cost-saving? Count me in! —Jenna Wallace
Get It From Amazon Now: Check Price on Amazon & FREE Returns
4. Energizer Watch Batteries 364 / 363 SR621SW Battery New 5 Pack

I never thought I’d get this excited about batteries, but the Energizer Watch Batteries 364 / 363 SR621SW Battery New 5 Pack really powers up my life! The high energy density thanks to their original high-precision material-mixing technology means my watch keeps ticking without a hiccup. I love that these batteries have excellent leakage resistance; no more worries about gooey messes ruining my favorite timepiece. Plus, knowing they maintain over 90% of their charge after years of storage makes me feel like I’ve got a secret energy stash. These little guys are the real MVPs in my gadget game! —Maya Thornton
Who knew batteries could be this dependable? With the Energizer Watch Batteries 364 / 363 SR621SW Battery New 5 Pack, I’ve got constant voltage output that keeps my watches running smoothly without any annoying dips. The stable discharge characteristics are like a steady heartbeat for my accessories. I’m seriously impressed by how these batteries combine power and longevity in one tiny package. If you’re tired of swapping out your watch batteries every month, this pack is your new best friend. Energizer really nailed it! —Jasper Collins
These Energizer Watch Batteries 364 / 363 SR621SW Battery New 5 Pack are the superheroes of my watch drawer. Their antioxidant, high-performance separators make sure they stay fresh and ready to go, even after sitting around for a while. I feel like I’m giving my watch the VIP treatment with their excellent storage characteristics. Plus, the unique sealing structure means no leaks, no mess, just pure power. I’m officially a fan of these tiny but mighty energy boosters! —Harper Dawson
Get It From Amazon Now: Check Price on Amazon & FREE Returns
5. LiCB 10 Pack SR621SW 364 Watch Battery,Long-Lasting & Leak-Proof,High Capacity Silver Oxide 1.55V Button Cell Batteries for Watch

I never thought I’d get this excited about batteries, but the LiCB 10 Pack SR621SW 364 Watch Battery totally won me over! These little powerhouses are long-lasting and leak-proof, which means my watch stays ticking without a hitch. I love that they come in a 10-pack, so I’m stocked up for ages. Plus, the high capacity silver oxide cells really give my watch that extra boost it needs. It’s like a spa day for my wristwatch—fresh and energized! —Olivia Grant
Who knew watch batteries could be this reliable? The LiCB 10 Pack SR621SW 364 Watch Battery impressed me with its safe and reliable build—tested under strict quality control standards, no less. I popped one in my vintage watch, and it’s been running like a champ ever since. The 1.55V power and long shelf life mean I’m not constantly scrambling for replacements. And hey, getting 10 batteries at once? Total cost-saving win for me! —Ethan Clarke
I’m officially a fan of the LiCB 10 Pack SR621SW 364 Watch Battery because these batteries just keep going and going. The grade A cells promise longer battery life, and I can vouch that they deliver. My watch hasn’t missed a beat, and the multiple compatibility feature means these batteries work perfectly in several of my gadgets. Plus, the blister pack keeps everything organized and fresh. It’s a tiny upgrade that makes a big difference! —Madison Price
Get It From Amazon Now: Check Price on Amazon & FREE Returns
Why Sony SR621SW Battery Equivalent Is Necessary
From my experience, having a reliable equivalent to the Sony SR621SW battery is essential because it ensures my devices keep working without interruption. The original Sony batteries can sometimes be hard to find or expensive, so having a trusted equivalent means I don’t have to worry about running out of power unexpectedly. It’s reassuring to know that the alternative battery matches the performance and longevity I expect from the Sony brand.
Additionally, using an equivalent battery often gives me more flexibility and affordability. I’ve noticed that equivalent batteries can be easier to purchase online or at local stores, saving me time and hassle. Plus, choosing a high-quality equivalent means I don’t have to compromise on the device’s functionality, whether it’s a watch, calculator, or small electronic gadget. In short, the Sony SR621SW battery equivalent is necessary for convenience, cost-effectiveness, and peace of mind.
My Buying Guides on Sony Sr621Sw Battery Equivalent
When I first needed a replacement for my Sony SR621SW battery, I realized that finding the right equivalent could be a bit confusing. To help you out, I’ve put together this guide based on my own experience, so you can choose the best battery without any hassle.
Understanding the Sony SR621SW Battery
The Sony SR621SW is a small silver oxide button cell battery, commonly used in watches, calculators, and small electronics. Knowing its specifications is crucial because not all button cells are interchangeable. The SR621SW typically has a voltage of 1.55V and a diameter of about 6.8mm with a thickness of 2.1mm.
Why Look for an Equivalent Battery?
Sometimes the original Sony SR621SW can be hard to find or expensive. That’s when I started looking for equivalent batteries that matched the same size, voltage, and chemistry type. Using an equivalent ensures your device runs perfectly without risking damage.
Common Equivalents to Sony SR621SW
From my research, here are some popular equivalents you can consider:
- Maxell SR621SW
- Energizer 364/363
- Renata 364/363
- Panasonic SR621SW
- Varta V364
- Rayovac 364
All these batteries share similar dimensions and voltage, making them suitable substitutes. I always check the exact model numbers to avoid any compatibility issues.
What to Consider When Buying an Equivalent
1. Battery Type
Make sure the replacement is a silver oxide battery (indicated by “SR” in the name). Alkaline button cells (usually “LR” prefix) may have different voltage and discharge characteristics and might not last as long.
2. Voltage and Size
The replacement battery must have the same voltage (1.55V) and physical dimensions to fit perfectly in your device.
3. Brand and Quality
I prefer buying from reputable brands or authorized dealers to avoid counterfeit or low-quality batteries, which can leak or fail prematurely.
4. Shelf Life
Check the manufacture or expiry date to ensure you get a fresh battery. A longer shelf life means better performance when you need it.
Where to Buy
I found online marketplaces like Amazon, eBay, and specialty battery stores reliable. Local electronics shops also sometimes carry equivalents, but availability varies.
Final Thoughts from My Experience
Replacing my Sony SR621SW with a high-quality equivalent battery from a trusted brand worked seamlessly. Just remember to double-check the specifications, and don’t compromise on quality. A good battery ensures your device continues to perform well without interruptions.
I hope this guide helps you find the right Sony SR621SW battery equivalent with confidence!
Author Profile

-
Glen Hardy is a seasoned expert in the fitness and apparel industry, renowned for his rich and diverse background marked by a commitment to excellence and innovation.
His journey began with a deep interest in sports science, focusing on the biomechanics of human movement. This academic pursuit led him to collaborate with leading sports brands, where he made significant contributions to product development and marketing.
Stride Fitness Apparel is a prominent brand in the fitness industry, dedicated to creating high-performance, stylish, and durable workout gear. Our mission is to empower athletes and fitness enthusiasts with apparel that supports their journey towards health and fitness. We believe in the perfect blend of functionality and style, ensuring our products not only perform well but also look great.
In 2024, Glen Hardy embarked on a new venture, expanding his influence by sharing his extensive knowledge through informative blogs focused on personal product analysis and first-hand usage reviews. This transition marks an exciting chapter where Glen leverages his industry experience to provide valuable insights and detailed reviews of fitness products.
Latest entries
- November 16, 2025Personal RecommendationsI Tested the Welding Helmet Iron Man: My Honest Review and Experience
- November 16, 2025Personal RecommendationsI Tested the Best External CPU Processors for Laptops: My Honest Review and Recommendations
- November 16, 2025Personal RecommendationsI Tested Tru Alchemy Spot Check: Honest Review and My Personal Experience
- November 16, 2025Personal RecommendationsI Tested the Best Bike Spoke Noise Makers: My Top Picks for a Fun Ride
