Here's the straight answer: AG13, LR44, and 357 are the same battery. They're just different label names for the identical 1.5-volt alkaline button cell. The letters and numbers refer to different international naming standards, but they all describe one universal product. If your device calls for any of these three names, you can confidently use AmVolt AG13 LR44 SR44 357 Premium Alkaline Batteries without worrying about compatibility. The confusion exists because manufacturers and retailers haven't standardized which name to use on packaging, leaving buyers wondering if they're actually buying the same thing. They are.
Why Do Button Batteries Have So Many Names?
The naming chaos stems from competing standards organizations around the world. The IEC (International Electrotechnical Commission) calls it LR44. ANSI (American National Standards Institute) labels it AG13. Other regions use 357 or 303. None of these designations means the battery performs differently, costs different amounts, or fits differently in your device. They all describe the same 1.5-volt, non-rechargeable alkaline cell that's roughly 11.6mm in diameter and 5.4mm thick.
Think of it like how a movie might be titled differently in different countries, but it's the same film. When you see a device's manual say "use LR44" and a battery package labeled "AG13," you're still buying the identical product. The real issue is that retailers and manufacturers mix these names on packaging, online listings, and in customer service descriptions, which creates unnecessary doubt for shoppers trying to make a simple purchase decision.
What About SR44 or 303? Are Those the Same Too?
SR44 and 303 are not identical to LR44, even though they look almost identical and sometimes work in the same devices. SR44 is a silver oxide battery, which has a different chemical composition than the alkaline LR44. It delivers slightly different voltage characteristics and lasts longer in some applications, particularly high-drain devices like cameras or hearing aids. The 303 is genuinely different as well. We covered this in more detail in our guide on LR44 vs 303 Battery: Are These Two Button Cell Labels Really Interchangeable.
For watches, clocks, and most household electronics, LR44 (AG13, 357) is what you want. For hearing aids or precision instruments that need extended runtime, you might consider SR44. But if your device manual specifies LR44 or AG13, those two names are safe swap-outs for each other every single time.
How Can You Be Confident You're Buying the Right Battery?
Look at three things: the voltage, the device manual, and the chemistry type. All legitimate LR44/AG13/357 batteries deliver 1.5 volts. Check your device manual or the battery compartment label to see which name it mentions, then look for any of those three names on the battery package you're considering. AmVolt AG13 LR44 SR44 357 Premium Alkaline Batteries clearly lists all three compatible names on the packaging, which removes the guesswork entirely.
Confirm the battery type says "alkaline" or "non-rechargeable" before purchasing. Some aftermarket sellers mix silver oxide batteries into product listings under LR44 or AG13 names, which will technically work but may deliver different performance in sensitive devices. Reading the product description or package text takes 10 seconds and prevents compatibility issues entirely.
Why Buy a 15-Pack If You're Just Replacing One Battery?
Most homes have way more devices that need these tiny batteries than people realize. Watches, alarm clocks, calculators, remote controls, hearing aids, thermostats, keychain flashlights, and children's toys all run on LR44s. Once you buy a multi-pack, you'll find yourself reaching into it constantly. The per-battery cost drops significantly when you buy in bulk, and having spares on hand means you're never stuck waiting for a delivery or searching multiple stores when a device dies.
A single battery from a pharmacy or convenience store often costs $3 to $5. A 15-pack brings that cost down to roughly 50 cents per battery. Over a year, that savings adds up, and you've always got a backup ready when you need one.
The Bottom Line on Your Purchase Decision
Stop overthinking the label. AG13, LR44, and 357 are interchangeable names for the same reliable 1.5-volt alkaline button battery. When you buy AmVolt AG13 LR44 SR44 357 Premium Alkaline Batteries, you're getting a product that works across all your household devices, costs less per unit than single-pack alternatives, and removes the confusion by acknowledging all three names upfront. Your watch, clock, calculator, and remote control will all run fine on any of these three labels, as long as you're buying alkaline, not silver oxide or rechargeable alternatives.