The short answer: LR44 and SR44 are actually the same battery, just with different names. They're both 1.5-volt alkaline button cells that work identically in watches, calculators, hearing aids, and small electronic devices. The confusion exists because manufacturers and retailers use these terms interchangeably, so when you're shopping, you'll see "LR44," "SR44," "AG13," "357," and "303" all used to describe the same physical product. If you're choosing between them for a specific device, either will perform equally well, assuming they're from a quality brand like the AmVolt AG13 SR44 357 Premium Battery Pack.
Why So Many Names for One Battery?
Different manufacturers and standards organizations created different naming systems, and those names all stuck. The International Electrotechnical Commission (IEC) uses "LR44," while some Japanese manufacturers prefer "SR44." The letters indicate it's an alkaline battery (that's what "R" stands for), and the numbers describe the physical dimensions. When you buy button batteries, you're likely to see all these labels floating around online and in stores, which makes the shopping experience unnecessarily confusing.
Here's what matters: whether the package says LR44, SR44, AG13, 357, or 303, you're buying the same 1.5-volt button battery with the same chemical composition and performance characteristics. The only real difference is which regional standard or manufacturer was involved in naming and distributing it. From a practical standpoint, this means you don't need to stress about getting exactly one label versus another.
What You Actually Need to Know About Performance
Both LR44 and SR44 deliver the same 1.5-volt output and have identical shelf lives when stored properly. They'll power your watch, hearing aid, or calculator for exactly the same amount of time. The performance difference between brands matters far more than the labeling difference between LR44 and SR44. A premium brand like AmVolt will outperform a cheap generic battery of either label simply because the alkaline chemistry is more stable and the manufacturing quality is higher.
We covered the broader battery compatibility question in more detail in our guide on AG13 vs LR44 vs 357: Which Battery Should You Actually Buy?, which walks you through all the similar-sounding options and explains why they're essentially the same product.
How to Choose with Confidence
The buying decision should come down to three things: first, check your device manual or the battery compartment label to see what it calls for; second, buy from a reliable manufacturer that guarantees freshness and quality; and third, consider buying in bulk if you have multiple devices that use button batteries. The AmVolt AG13 SR44 357 Premium Battery Pack is a solid choice because you get 15 batteries at a much lower per-unit cost than buying single batteries or small packs.
One practical tip: don't buy batteries based on which label sounds most official or standard. "LR44" might sound more technical than "SR44," but they're identical performers. Instead, buy based on brand reputation and freshness guarantee. Quality manufacturers will clearly print manufacturing dates and expiration dates on their packaging, which tells you the batteries haven't been sitting in a warehouse for years.
When Bulk Buying Makes Sense
If you have a watch, hearing aid, calculator, laser pointer, or any other small electronics, you probably have multiple devices that burn through button batteries. Buying a 15-pack instead of individual batteries or tiny 2-packs saves money per battery and means you're always stocked when a device dies. The shelf life of quality alkaline button batteries is typically five to ten years, so a large pack won't go to waste.
Storage is straightforward: keep them in a cool, dry place away from metal objects that could create short circuits. A small container or the original packaging works fine. The main thing is not storing them loose where they could accidentally touch each other or other metal items in a drawer.
The Bottom Line
LR44 and SR44 deliver identical performance because they're the same battery with different names. You're not choosing between two different products when you see these labels; you're just seeing the same battery described according to different regional standards. What actually matters is the brand quality and where you buy from. If your device manual calls for an LR44, SR44, AG13, 357, or 303, any of those labels will work equally well. Focus on getting a reliable brand that's fresh and reasonably priced, and don't overthink the naming confusion. A quality multi-pack like the AmVolt AG13 SR44 357 Premium Battery Pack covers all your button battery needs without the stress of hunting down the "right" label.