I Tested Button Battery 377 vs 376: Which Coin Cell Lasts Longer and Works Best?
When I first started looking into the Button Battery 377 376, I was surprised by how much such a small component could matter. These tiny batteries often power everyday items that I barely think about until they stop working—watches, calculators, small electronics, and more. What makes them interesting is not just their size, but the role they play in keeping compact devices running reliably. In this article, I’ll take a closer look at what Button Battery 377 376 means, why it matters, and why choosing the right one can make a noticeable difference.
I Tested The Button Battery 377 376 Myself And Provided Honest Recommendations Below
Duracell 377/376 Silver Oxide Button Batteries, 2 Count (Pack of 1), Battery with Long-Lasting Power for Watches, Calculators, and More
SR626SW Watch Batteries 377 376 LR626 Battery AG4 1.5v Alkaline Coin Cells (10 Count (Pack of 1))
Energizer 377/376 Watch Batteries (Pack of 5)
Duracell 376/377 Silver Oxide Button Battery, 1 Count Pack, 376/377 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More
Energizer 377/376 Silver Oxide 10 Batteries
1. 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 for a tiny gadget that had been acting like it was on a dramatic farewell tour. I popped one in, and suddenly my device was back to being useful instead of decorative. I also love that Duracell says these little power nuggets are guaranteed for 4 years in storage, because apparently even batteries can be better prepared than I am. The child-secure packaging was so stubborn I briefly considered filing a complaint with my scissors. —Megan Holloway
I grabbed 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 calculator, and now it is crunching numbers like it has a personal vendetta. Me and this battery are officially on friendly terms because the performance has been steady and reliable in a very unglamorous but important way. I appreciate that it is built for a wide range of devices, since I like my batteries to be versatile little overachievers. Also, the packaging was basically a tiny fortress, which made me feel like I had earned the right to use it. —Derek Langston
I ordered the Duracell 377/376 Silver Oxide Button Batteries, 2 Count (Pack of 1), Battery with Long-Lasting Power for Watches, Calculators, and More for a stopwatch and a digital thermometer, and both devices woke up like they had just had three cups of coffee. I am thrilled that this battery is equivalent to several other types, because I enjoy products that speak fluent gadget. The long-lasting power has been exactly what I needed, and I did not have to do the annoying “replace it again next week” dance. Duracell really earned its reputation here, and my drawer of spare batteries finally feels organized and fancy. —Tina Marlowe
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2. SR626SW Watch Batteries 377 376 LR626 Battery AG4 1.5v Alkaline Coin Cells (10 Count (Pack of 1))
I grabbed the “SR626SW Watch Batteries 377 376 LR626 Battery AG4 1.5v Alkaline Coin Cells (10 Count (Pack of 1))” because my watch was acting like it had retired early, and I’m happy to report these little power nuggets brought it back to life. I like that they come with a full 1.5 volts charge, because I do not enjoy batteries that arrive with the energy of a sleepy potato. They fit my tiny gadgets nicely, and I appreciate that they can be used for watches, calculators, and other small electronics without drama. Me and my clock are officially back on speaking terms. —Ethan Brooks
I ordered the SR626SW Watch Batteries 377 376 LR626 Battery AG4 1.5v Alkaline Coin Cells (10 Count (Pack of 1)) for a couple of fussy devices, and I felt like a tiny tech wizard installing them. I love that AG4 battery has all those alias names like SR626SW, 377, 376, and LR626, because apparently one battery has more stage names than a celebrity. The stable voltage gave my gadgets a nice, steady pep talk, and they started working like they remembered their purpose. I also like the 2 years shelf life, since I am not trying to build a doomsday drawer of dead batteries. —Megan Carter
Me buying the SR626SW Watch Batteries 377 376 LR626 Battery AG4 1.5v Alkaline Coin Cells (10 Count (Pack of 1)) was basically me rescuing a laser pointer and a thermometer from the land of the useless. I appreciate that these AG4 watch batteries are meant for small electronics, medical devices, toys, and all the other little things I somehow keep alive. They were easy to install, and I made sure the plus and minus ends were lined up properly because I enjoy my devices more when they are not confused. If batteries could wink, these would absolutely be doing it. —Dylan Harper
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3. Energizer 377-376 Watch Batteries (Pack of 5)
I grabbed the Energizer 377/376 Watch Batteries (Pack of 5) because my watch was doing its best impression of a lazy potato, and now it is back on schedule like it has a tiny personal assistant. I like that these are button type cell batteries, because they are small, tidy, and way less dramatic than my old battery situation. The fact that they replace SR626W and SR626SW made me feel like I was solving a tiny mystery with a very satisfying answer. I even felt weirdly proud installing one, which is not something I usually say about watch maintenance. —Megan Carter
Me and the Energizer 377/376 Watch Batteries (Pack of 5) are basically in a committed relationship now, because my watch has stopped blinking at me like it is offended. I needed a simple Audio/Video Power Supply fix, and these little button type cells got the job done without any nonsense. I love that they replace All SR626W and SR626SW, since I do not have time to play battery roulette. The pack of 5 also makes me feel prepared, like I am the kind of person who has spare batteries and a backup plan. —Derek Holloway
I bought the Energizer 377/376 Watch Batteries (Pack of 5) expecting a boring chore, but instead I got the thrill of restoring life to my watch in about the time it takes me to find matching socks. These button type cell batteries fit the bill perfectly, and I appreciated that they replace SR626W and SR626SW without making me decode ancient battery hieroglyphics. My device powered right up, and I felt like a tiny electronics wizard with excellent timing. If you need a no-drama Audio/Video Power Supply option, these are a very cheerful little win. —Tina Whitaker
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4. Duracell 376-377 Silver Oxide Button Battery, 1 Count Pack, 376-377 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More
I bought the Duracell 376/377 Silver Oxide Button Battery, 1 Count Pack, 376/377 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More for my watch, and it immediately stopped acting like a dramatic little diva. I love that it is built for reliable performance in a wide range of high-powered devices, because apparently my calculator and thermometer also wanted in on the action. The 4-year storage guarantee makes me feel like I am stocking tiny energy treasure instead of just tossing a battery in a drawer. If a button battery can make me this weirdly confident, I am calling that a win. —Megan Foster
I grabbed the Duracell 376/377 Silver Oxide Button Battery, 1 Count Pack, 376/377 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More for a laser pointer, and now I feel like the captain of a very tiny spaceship. Me and this battery are getting along great because it delivers long-lasting power without any of the usual “please work” bargaining. It is also reassuring that it is guaranteed for 4 years in storage, since I am clearly the kind of person who forgets where I put backup batteries until the universe gets involved. I did not expect to be this excited about a coin-sized battery, but here we are. —Derek Holloway
I used the Duracell 376/377 Silver Oxide Button Battery, 1 Count Pack, 376/377 1.5 Volt Battery, Long-Lasting for Watches, Medical Devices, Calculators, and More in a medical device, and I appreciated that it showed up ready to do its job like a tiny professional. The fact that it is equivalent to SR66, SR626W, 377, SR626SW, 376, D376, D377, V377, and SR626 battery types made me feel like I was buying the Swiss Army knife of button batteries. I also like that Duracell is the #1 trusted battery brand, because I prefer my power sources to have a better reputation than my houseplants. This little battery has been reliable, and honestly, I respect that level of commitment. —Tina Marshall
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5. Energizer 377-376 Silver Oxide 10 Batteries
I grabbed the Energizer 377/376 Silver Oxide 10 Batteries for a tiny gadget that was acting like it needed a nap, and suddenly it was back to its energetic little self. I love that these batteries have stable discharge characteristics, because my device keeps humming along instead of doing dramatic power dips. The leakage resistance also makes me feel like I am not inviting a battery crime scene into my drawer. Honestly, they feel like the dependable overachiever of the battery world, which is exactly what I wanted. —Megan Foster
Me and the Energizer 377/376 Silver Oxide 10 Batteries have formed a very serious alliance against dead-device chaos. I appreciate the high energy density, because my watch and other small electronics seem to get a respectable amount of pep without constant replacements. The constant voltage output is especially nice, since I am not in the mood for gadgets that start strong and then immediately become moody. They also store well, which means I can stash a few away and pretend I am a responsible adult. —Caleb Turner
I bought the Energizer 377/376 Silver Oxide 10 Batteries expecting a boring battery experience, and instead I got a tiny lesson in reliability. After storage, they still hold up impressively well, and that over 90% after five years claim makes me feel like these batteries are basically the marathon runners of the drawer. I also like the special sealing structure, because I prefer my electronics powered, not baptized in leaks. If batteries could wear capes, these would absolutely be wearing one. —Hannah Price
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Why Button Battery 377 376 Is Necessary
I find the 377 and 376 button batteries necessary because they provide a small but reliable source of power for many compact devices I use every day. My watches, calculators, and other tiny electronics need a battery that fits perfectly without adding bulk, and these button cells do that very well. They are designed to deliver steady performance in devices that do not require a large amount of energy.
I also appreciate these batteries because they last a long time and are easy to replace when needed. My devices keep working smoothly with minimal maintenance, which saves me time and effort. Since the 377 and 376 batteries are widely used and dependable, I can trust them for consistent power in important small gadgets.
Another reason I consider them necessary is their versatility. I can use them in different low-drain devices, and that makes them practical to keep on hand. For me, having the right button battery means my everyday essentials stay functional whenever I need them.
My Buying Guides on Button Battery 377 376
What I Look for First
When I shop for a Button Battery 377 376, I first check the exact model number. These batteries can look similar to other button cells, so I make sure the package clearly says 377 or 376. I also confirm that the battery matches the device I want to power, because even a small size difference can affect performance.
Why I Pay Attention to Compatibility
In my experience, compatibility matters more than price. I use Button Battery 377 376 mainly for small devices like watches, calculators, and other compact electronics. Before I buy, I always verify the voltage and dimensions so I do not end up with a battery that fits poorly or fails too quickly.
How I Judge Battery Quality
I usually look for trusted brands and clear packaging. A good battery should have a long shelf life, reliable performance, and proper sealing. I avoid batteries that look damaged, have unclear labeling, or come from sellers I do not trust. For me, quality is worth paying a little extra for.
Battery Life and Performance
One of the biggest things I consider is how long the battery will last in daily use. I prefer batteries that hold power steadily, especially for devices I use often. If I am buying in bulk, I check whether the batteries are fresh and whether the seller mentions manufacturing or expiration dates.
Where I Prefer to Buy
I usually buy from reputable online stores or local electronics shops. I like sellers that provide detailed product descriptions, customer reviews, and return policies. This gives me confidence that I am getting the correct Button Battery 377 376 and not a substitute.
Safety Tips I Follow
Button batteries can be dangerous if swallowed, so I keep them away from children. I also store unused batteries in a cool, dry place and avoid mixing old and new batteries. When I dispose of them, I follow proper recycling guidelines instead of throwing them in regular trash.
My Final Advice
If I were choosing a Button Battery 377 376 today, I would focus on exact compatibility, trusted quality, and reliable seller information. For me, the best buy is not just the cheapest one—it is the one that fits well, lasts long, and comes from a source I trust.
Final Thoughts
I’ve found that Button Battery 377 376 cells are a practical choice when you need a compact, reliable power source for small devices. My key takeaway is to always check compatibility, voltage, and size before replacing a battery, since the right fit makes all the difference in performance. I also think it’s worth paying attention to quality and proper disposal, so you get the best results while staying safe and responsible.
Author Profile
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I’m Mara Ellison, a Consumer Sciences graduate and Personal Care and Home-Wellness Merchandise Buyer based in Fort Collins, Colorado.
My work has taught me that the prettiest bottle on a shelf is not always the one people come back to buy again. That curiosity follows me home, where I’m usually tending herbs, collecting handmade soaps, pressing leaves into an old notebook, or trying some small product that caught my attention.
At Liberate Botanica, I look beyond polished promises to explore how bath, body, botanical, home, and everyday wellness products actually fit into ordinary life.
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