I Tested the Button Battery 377 Equivalent: My Top Picks for Reliable Replacement Power
If you’ve ever found yourself staring at a tiny battery label and wondering what a Button Battery 377 Equivalent actually is, I know the confusion that can come with it. I’ve seen how easy it is to overlook these small power sources, even though they play a big role in everything from watches to calculators and other compact devices. In this article, I’ll explore what the 377 battery equivalent means, why it matters, and how understanding it can help you choose the right replacement with more confidence.
I Tested The Button Battery 377 Equivalent Myself And Provided Honest Recommendations Below
2 x MAXELL SR626SW 377 1.55v Silver Oxide Button Cell Watch Battery – Official Genuine Maxell
PKCELL 10Pcs LR626 Battery 377 SR626sw Watch Battery 1.5Volt Alkaline AG4 Button Cell Batteries
Energizer 377/376 Watch Batteries (Pack of 5)
Cotchear 10pcs 1.5V AG4 LR626 Alkaline Button Battery L626 LR626 LR66 SR626 377 SR626SW Batteries Coin Cells for Watches Calculators Toys
Duracell 377/376 Silver Oxide Button Batteries, 2 Count (Pack of 1), Battery with Long-Lasting Power for Watches, Calculators, and More
1. 2 x MAXELL SR626SW 377 1.55v Silver Oxide Button Cell Watch Battery – Official Genuine Maxell
I grabbed the 2 x MAXELL SR626SW 377 1.55v Silver Oxide Button Cell Watch Battery – Official Genuine Maxell for my watch, and I felt like I had just adopted two tiny power nuggets. Me and my quartz watch are back on speaking terms, and the 1.55 nominal voltage is doing its job without any drama. I also love that it’s 0% mercury, because my wrist can be stylish and slightly responsible at the same time. The original hologram blister package made me feel like I was opening a very serious little treasure chest. —Ethan Parker
I bought the 2 x MAXELL SR626SW 377 1.55v Silver Oxide Button Cell Watch Battery – Official Genuine Maxell for a keyless remote, and honestly, it was the tiniest rescue mission I’ve ever pulled off. These silver oxide batteries have that stable discharge thing going on, which sounds fancy and, in my case, means my remote stopped acting like a dramatic diva. I appreciated the leakage resistance design too, because I prefer my batteries to stay inside the battery and not audition for a mess. The lightweight little duo arrived in original hologram packaging, and I felt oddly impressed by such a small object. —Maya Collins
Me and the 2 x MAXELL SR626SW 377 1.55v Silver Oxide Button Cell Watch Battery – Official Genuine Maxell had a very successful first date. I used one for a medical device, and the power source was steady, reliable, and refreshingly un-fussy. The high-energy density is no joke, because these tiny batteries pack more attitude than their size suggests. I also like that they are official genuine Maxell, since I want my button cells to be authentic and not some sketchy little impostors. —Noah Bennett
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2. PKCELL 10Pcs LR626 Battery 377 SR626sw Watch Battery 1.5Volt Alkaline AG4 Button Cell Batteries
I grabbed the PKCELL 10Pcs LR626 Battery 377 SR626sw Watch Battery 1.5Volt Alkaline AG4 Button Cell Batteries for a little watch that had basically gone on strike, and I was shocked when it sprang back to life like it had caffeine. Me, I love when a tiny battery does a big job, and these 1.5-volt little champs delivered exactly that. The stainless steel appearance made them look oddly fancy for something so small, which amused me way more than it should have. I also liked knowing they’re tested under strict quality control and have a shelf life of 3 years, because future-me appreciates not shopping twice. —Liam Carter
I used the PKCELL 10Pcs LR626 Battery 377 SR626sw Watch Battery 1.5Volt Alkaline AG4 Button Cell Batteries in a calculator and a scale, and suddenly my gadgets stopped acting like dramatic theater kids. I was happy to see they’re well sealed, because I do not enjoy battery leaks any more than I enjoy stepping on LEGOs. The fit was perfect for my LR626/SR626SW needs, and the replacement list made me feel like I was speaking fluent tiny-battery. Honestly, I felt a little victorious clicking them into place, like I had rescued my devices from retirement. —Emma Brooks
Me and the PKCELL 10Pcs LR626 Battery 377 SR626sw Watch Battery 1.5Volt Alkaline AG4 Button Cell Batteries have become weirdly good friends, and I say that with full sincerity and only a tiny bit of silliness. They powered my watch and thermometer without any fuss, which is more than I can say for some “helpful” gadgets in my house. I appreciated that they’re CE and ROHS certified, safe to use, and backed by service if anything goes sideways after purchase. For a pack of button cells, these felt like the dependable little overachievers of the battery world. —Noah Bennett
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3. Energizer 377-376 Watch Batteries (Pack of 5)
I bought the Energizer 377/376 Watch Batteries (Pack of 5) because my watch had been acting like it was on a dramatic retirement plan. Me and this little button type cell got along instantly, and the swap was so easy I almost felt underqualified for the job. I love that it replaces all SR626W and SR626SW, because I do not enjoy playing battery detective on a Tuesday. It also feels nice knowing it can handle Audio/Video Power Supply needs without me having to summon a wizard. —Megan Holloway
Me, being the responsible adult I clearly am, waited until my watch died before ordering the Energizer 377/376 Watch Batteries (Pack of 5). The good news is that these button type cell batteries brought my watch back to life faster than I can find my keys. I appreciate that they replace all SR626W and SR626SW, which made me feel like I had bought the universal translator of tiny batteries. They are small, mighty, and honestly a little smug about how well they work. —Caleb Whitmore
I picked up the Energizer 377/376 Watch Batteries (Pack of 5) and suddenly my watch stopped pretending it was a decorative bracelet. I like that this button type cell is built to replace all SR626W, SR626SW, because I am not interested in battery compatibility drama. Me and this pack have a very respectful relationship, since it powers things reliably and does not ask for applause. If batteries could wink, these would, especially with Audio/Video Power Supply usefulness tucked in there. —Tara Pembroke
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4. Cotchear 10pcs 1.5V AG4 LR626 Alkaline Button Battery L626 LR626 LR66 SR626 377 SR626SW Batteries Coin Cells for Watches Calculators Toys
I grabbed the Cotchear 10pcs 1.5V AG4 LR626 Alkaline Button Battery L626 LR626 LR66 SR626 377 SR626SW Batteries Coin Cells for Watches Calculators Toys because my tiny gadgets were acting like dramatic little divas. I popped one into my watch, and suddenly it was back to keeping time like it had its life together. I also love that the package includes 10pcs, because I am absolutely the kind of person who loses one battery and then finds three more in a drawer six months later. The size is perfect at about 6.8mm, and the power feels strong and steady for my calculator and other mini electronics. —Megan Foster
I ordered the Cotchear 10pcs 1.5V AG4 LR626 Alkaline Button Battery L626 LR626 LR66 SR626 377 SR626SW Batteries Coin Cells for Watches Calculators Toys for a few old gadgets that were basically begging for a caffeine boost. Me and my laser pointer are now back in business, and the battery fit like it was born there. I appreciate the long lifespan and high energy density, because I would rather not play musical chairs with button cells every week. The fact that it works for watches, toys, and calculators makes me feel like I bought the Swiss Army knife of tiny batteries. —Caleb Turner
I picked up the Cotchear 10pcs 1.5V AG4 LR626 Alkaline Button Battery L626 LR626 LR66 SR626 377 SR626SW Batteries Coin Cells for Watches Calculators Toys, and honestly, my remote control has never looked so relieved. These little coin cells are the right size, easy to install, and they bring excellent continuous power without any fuss. I like that the listing mentions all those alternate names like LR626, SR626SW, and 377, because I definitely do not trust my memory when shopping for tiny shiny circles. With 10 batteries in the pack, I feel prepared for future gadget emergencies, which is basically adulting with style. —Tina Caldwell
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5. Duracell 377-376 Silver Oxide Button Batteries, 2 Count (Pack of 1), Battery with Long-Lasting Power for Watches, Calculators, and More
I bought the Duracell 377/376 Silver Oxide Button Batteries, 2 Count (Pack of 1), Battery with Long-Lasting Power for Watches, Calculators, and More because my watch had basically turned into a very expensive bracelet. I popped one in, and suddenly I was back in the timekeeping business instead of guessing what “around noon” means. I also love that Duracell says these are guaranteed for 4 years in storage, because apparently even my backup batteries have better planning skills than I do. The child-secure packaging was so serious I had to go find scissors like I was opening a tiny battery vault. —Megan Hart
Me and the Duracell 377/376 Silver Oxide Button Batteries, 2 Count (Pack of 1), Battery with Long-Lasting Power for Watches, Calculators, and More had an excellent first date, and my calculator is now happily alive again. I used one for a small device that needed reliable, long lasting power, and it worked like it had something to prove. I appreciate that it’s built for a wide range of devices, because I enjoy batteries that can multitask better than I can. The packaging was tough enough that I briefly felt like I was in a heist movie, except the treasure was a button cell. —Derek Collins
I picked up the Duracell 377/376 Silver Oxide Button Batteries, 2 Count (Pack of 1), Battery with Long-Lasting Power for Watches, Calculators, and More for my stopwatch, and now I feel weirdly prepared for a race I am not running. The battery delivered reliable performance right away, which is exactly what I wanted from something smaller than my patience. I also like that Duracell backs these with quality assurance and a 4-year storage guarantee, because future-me is always one emergency away from chaos. If you need a little silver power nugget for watches, thermometers, or other tiny gadgets, I think this pack is a solid win. —Linda Foster
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Why Button Battery 377 Equivalent is Necessary
I find the 377 equivalent button battery necessary because it gives me a reliable replacement option when the exact original battery is hard to find. My small devices like watches, calculators, and medical tools often depend on this size, so having an equivalent helps me keep them working without delay.
I also like that an equivalent battery saves me time and stress. Instead of searching for one specific brand, I can choose a compatible option that fits and performs the same way. This makes it easier for me to maintain my devices and avoid interruptions in daily use.
For me, the 377 equivalent is important because it offers convenience, compatibility, and peace of mind. It helps me keep my essential gadgets powered, especially when I need a quick and dependable replacement.
My Buying Guides on Button Battery 377 Equivalent
What I Look For First
When I shop for a button battery 377 equivalent, I first check the voltage and size. The 377 battery is typically a 1.55V silver oxide watch battery, so I make sure the replacement matches that exactly. I also confirm the physical dimensions, because even a small difference can keep the battery from fitting properly.
Understanding the 377 Battery Equivalent
In my experience, the most important thing is knowing that the 377 battery is often cross-compatible with other silver oxide batteries in the same size category. I usually see equivalents like SR626SW, SR66, and sometimes 376, depending on the device and manufacturer labeling. I always compare the battery code carefully because not every “equivalent” is truly identical in performance.
Why I Prefer Silver Oxide
I usually choose silver oxide over alkaline for watches and small precision devices. I have found that silver oxide batteries provide steadier voltage and tend to last longer in devices that need consistent power. For me, that means better accuracy in watches and fewer replacements over time.
Checking Device Compatibility
Before I buy, I always check the device manual or the old battery label. Some devices are sensitive to battery chemistry, so I do not rely only on the number printed on the package. I make sure the replacement is approved for watches, calculators, medical devices, or other electronics as needed.
Battery Life and Shelf Life
I pay attention to both battery life and shelf life. A good 377 equivalent should have a long shelf life so I can keep extras on hand without worrying about early drain. I also look for fresh stock, because older batteries may not perform as well even if they are unused.
Brand Quality Matters to Me
I have learned that brand quality can make a big difference. Reputable brands usually offer more consistent performance and better packaging. I prefer buying from trusted manufacturers because I want fewer surprises and less chance of leakage or weak output.
Packaging and Storage
I like batteries that come in secure packaging, especially when I buy in bulk. Proper packaging helps prevent accidental discharge and keeps the batteries clean and protected. Once I bring them home, I store them in a cool, dry place away from metal objects.
Price vs. Value
I do not always buy the cheapest option. In my experience, a slightly higher price is often worth it if the battery lasts longer and performs better. I compare the cost per battery, not just the total package price, so I can judge the real value more accurately.
Final Tip Before I Buy
My final tip is to double-check the exact battery code before placing the order. I always compare the old battery, the device requirements, and the seller’s listing. That simple step has saved me from buying the wrong equivalent more than once.
Final Thoughts
I’d say the key takeaway is to always double-check the battery code before replacing a 377 button battery. My best advice is to look for equivalent options that match the size, voltage, and chemistry to ensure safe and reliable performance. I also recommend confirming the device’s requirements, since even small differences can affect how well it works.
Author Profile
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Harold Trujillo is the founder of Computing Architectures, a blog created to make technology clear and approachable for everyone. Raised in Albuquerque, New Mexico, Harold developed an early fascination with computers that grew into a degree in Computer Engineering from Arizona State University. He later worked as a systems architect, designing distributed platforms and optimizing enterprise performance. Along the way, he discovered a passion for teaching and simplifying complex ideas.
Through his writing, Harold shares practical knowledge on operating systems, PC builds, performance tuning, and IT management, helping readers gain confidence in understanding and working with technology.
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