The short answer is that LR44, AG13, SR44, 357, and 303 are all equivalent names for the same 1.5-volt button cell battery. They're simply different labels used by manufacturers and retailers, but they're chemically and functionally identical, which means any device designed for one will work perfectly with any of the others. This can be confusing when you're shopping, especially when you see these different names on store shelves and wonder if you're buying the right thing. The good news is that once you understand this, your buying decision becomes much simpler. You can shop the LR44 equivalent 15-pack on Amazon without worrying about whether the label says LR44 or AG13, because they're the exact same battery.
Why Do These Batteries Have So Many Different Names?
The confusion starts because different battery manufacturers use different naming systems. Some companies call it an LR44, others call it an AG13, and some use SR44 or 357 or 303. It's a lot like how tissues are called Kleenex by some people and facial tissue by others, even though they're the same product. The letters and numbers refer to the battery's chemistry, size, and voltage specifications, and they all point to the same standard: a 1.5-volt alkaline button cell that's about the size of a small coin. The International Electrotechnical Commission (IEC) set these standards to ensure compatibility, which is why your watch battery will work in your hearing aid, your calculator, or your keychain flashlight.
When you're shopping online or at a pharmacy, you might see all five names used interchangeably for what is physically the same battery. This overlap in naming is intentional from a compatibility standpoint, but it can definitely make buyers second-guess themselves at checkout. Many people worry they're getting the wrong product when they see a different label than what their device originally used. Understanding that these are genuinely equivalent takes that worry away.
How to Know Which Name Your Device Actually Uses
The best way to know what battery your device needs is to check the original product manual, the battery compartment itself, or the device packaging. Most devices will specify one of these names somewhere visible. For example, your watch's instruction manual might say "LR44," but the battery compartment itself might have "AG13" printed inside the door. This is completely normal and not a mistake. If you see a device that says it needs an LR44, you can confidently buy an AG13, 357, SR44, or 303 and it will work exactly the same way.
What Actually Matters When You're Buying
The real things to look for are the voltage (1.5V), the battery chemistry (alkaline is standard for these), and whether you want single-use or rechargeable versions. For the vast majority of household uses, you want standard alkaline, non-rechargeable button batteries. You can shop the LR44 equivalent 15-pack on Amazon and be assured you're getting a quality product that works in any device calling for any of these equivalent names.
The quality difference between brands is real, even though the battery chemistry is the same. Premium alkaline batteries maintain their 1.5V output more consistently over time, last longer in storage, and perform better in high-drain devices like hearing aids or digital watches. Budget versions may lose voltage more quickly or leak if they're stored improperly. We covered this in more detail in our guide on LR44 vs 357 Battery: Which One Should You Actually Buy?
Where to Actually Buy These Batteries
You'll find button batteries at drugstores, general retailers, and online marketplaces. The advantage of buying a multi-pack online is that the per-battery cost is significantly lower than buying single batteries at a pharmacy. A 15-pack gives you enough on hand so you're never caught without a replacement when a device dies. Most people go through these batteries in small devices like watches and hearing aids, so having them stocked is genuinely practical rather than wasteful.
Amazon tends to have competitive pricing on bulk button battery packs, and shipping is fast with Prime. You can reliably find premium alkaline options that deliver consistent voltage and long shelf life, which matters when you're storing them for occasional use. Just make sure you're buying from a seller with solid reviews, since counterfeit batteries do exist in this category. A pack from a brand with a recognized name and strong customer ratings will serve you well for watches, hearing aids, fitness trackers, medical devices, small flashlights, and any other household gadget that uses these tiny powerhouses.
Storage and Shelf Life Matter More Than You'd Think
These batteries hold their charge for years when stored properly, so buying in bulk doesn't mean you'll waste money on expired batteries. Keep them in a cool, dry place away from direct sunlight, and they'll stay fresh for 5 to 10 years depending on the brand. Some premium batteries have longer shelf life claims than others, which is another reason quality matters. If you buy cheaper batteries and let them sit for three years, there's a real chance they'll have lost voltage by the time you need them. A higher-quality 15-pack stored in your home or drawer will give you reliable power whenever you need it.
The Bottom Line on Equivalency
LR44, AG13, SR44, 357, and 303 are genuinely the same battery under different names. Your device will work with any of them, so don't let the different labels confuse your buying decision. Focus instead on buying from a reputable manufacturer that produces reliable alkaline button cells with consistent voltage output. When you shop the LR44 equivalent 15-pack on Amazon, you're getting a practical supply that covers whatever small electronic devices you have in your home.