LR44 batteries are small coin-shaped cells used in watches, calculators, hearing aids, and other compact devices

An LR44 is a single-use alkaline battery about the size of a dime. The "LR" stands for alkaline manganese, and "44" is the IEC (International Electrotechnical Commission) code for that specific size and chemistry. You'll recognize it by its flat, round shape—roughly 11.6 millimeters wide and 5.4 millimeters thick. It produces 1.5 volts of power, which is standard for alkaline cells.

These batteries are everywhere in household devices because they're cheap, reliable, and small enough to fit into tight spaces. A single LR44 can power a device for months or even years, depending on how often the device runs and how much current it draws. They're not rechargeable—once the battery dies, you replace it.

Key Takeaways

  • LR44 batteries are small alkaline coin cells that produce 1.5 volts and measure about the size of a dime.
  • Common devices that use LR44 batteries include digital watches, pocket calculators, laser pointers, hearing aids, and small LED lights.
  • LR44 batteries are sold under many brand names—Duracell, Energizer, Panasonic, and store brands all make them, often labeled as A76, AG13, or SR44 depending on the chemistry.
  • You can find LR44 batteries at drugstores, supermarkets, hardware stores, and online retailers, usually in packs of two or more.
  • Proper disposal matters because alkaline batteries contain materials that should not go in regular trash; most retailers that sell them also accept used batteries for recycling.

What devices actually use LR44 batteries

The most common place you'll encounter an LR44 is inside a digital watch. Wristwatches with LCD or LED displays almost always use one. Pocket calculators, especially the small ones you carry in a bag or keep in a desk drawer, run on LR44 cells. If you have a laser pointer—the kind used in presentations—it almost certainly holds an LR44 or two.

Hearing aids are another major user, though some modern hearing aids now use special zinc-air batteries instead. Small LED flashlights, key-chain lights, and novelty items like light-up toys or musical greeting cards often contain LR44 batteries. Medical devices like glucose meters and blood pressure monitors sometimes use them too. If you open the battery compartment of any small device and see a flat, round silver cell, it's probably an LR44.

LR44 vs. similar-looking batteries and naming confusion

The naming problem with LR44 batteries is real and frustrating. The same physical battery gets sold under multiple names depending on the manufacturer and the chemistry used. An LR44 (alkaline), an AG13 (silver oxide), and an SR44 (silver oxide) are all the same size and shape, but they have different chemistries and voltage curves. Most devices that call for an LR44 will work fine with an AG13 or SR44, but the silver oxide versions last longer and cost more.

Some manufacturers also label them as A76 or 357. Duracell calls their version the DL44. Energizer uses A76. Panasonic uses SR44. The safest approach is to check what battery your device originally came with or what the manual specifies. If you can't find that information, take the old battery to a store and match it by size and shape—the staff can help you find the right replacement.

Where to buy LR44 batteries

LR44 batteries are sold almost everywhere. Drugstores like CVS and Walgreens stock them near the checkout or in the health and beauty section. Supermarkets carry them in the household goods aisle. Hardware stores like Home Depot and Lowe's have them in the electrical section. Walmart and Target sell them in multiple locations throughout the store. Online, Amazon, eBay, and the websites of battery manufacturers all ship them quickly.

Prices vary widely depending on the brand and pack size. A single LR44 from a drugstore might cost $2 to $4, while a pack of four from an online seller might cost $3 to $6 total. Store brands are usually cheaper than Duracell or Energizer, and buying in bulk brings the per-battery cost down. If you use these batteries regularly, buying a larger pack online is almost always more economical than buying one or two at a time in a store.

How long an LR44 battery lasts

The lifespan of an LR44 depends almost entirely on what device it's powering. A watch that checks the time once a second might run for two to three years on a single LR44. A calculator that sits in a drawer and gets used occasionally might last five years or longer. A laser pointer used for a few minutes at a time might run for six months to a year. A hearing aid that runs continuously can drain an LR44 in a week or two.

The device's power draw is what matters. Anything that lights an LED or drives a motor uses more current than something that just displays numbers. If your device came with an LR44 and it died after a month, the device is probably drawing more power than the battery was designed for—check the manual to see if a different battery type is recommended. Storing batteries in a cool, dry place extends their shelf life, though LR44s don't degrade as quickly as some other battery types.

Disposing of used LR44 batteries safely

LR44 batteries should not go in the regular trash. They contain zinc, manganese, and other materials that can leach into soil and groundwater if they end up in a landfill. Most places have laws against throwing alkaline batteries away, though enforcement varies. The responsible choice is to recycle them.

Many retailers that sell batteries also accept used batteries for recycling at no charge. Call ahead or check the store's website to confirm. Best Buy, Home Depot, Lowe's, and some drugstores have battery recycling programs. You can also search for a local recycling center using Earth911.com or your city's waste management website. If you have only one or two batteries, holding onto them until you have a handful and then taking them to a retailer is fine—they don't degrade or become dangerous while sitting in a drawer.

Frequently Asked Questions

Can I use an AG13 or SR44 battery instead of an LR44?

In most cases, yes. AG13 and SR44 are the same physical size and will fit in any LR44 compartment. They produce 1.5 volts like an LR44 does. The main difference is that silver oxide batteries (AG13 and SR44) last longer and maintain their voltage more consistently, so your device may run longer. They cost more, but if your device drains batteries quickly, the extra cost might be worth it. Check your device's manual if you want to be certain.

How do I know if my LR44 battery is dead?

The simplest test is to remove the battery and put it back in. If the device still doesn't work, the battery is likely dead. Some devices have a low-battery indicator light or warning message. If you want to test the battery itself, a battery tester (sold at hardware stores for a few dollars) will show you the voltage. An LR44 should read around 1.5 volts when new; anything below 1.2 volts means it's time to replace it.

Are LR44 batteries safe to carry in a pocket or bag?

Yes, as long as they're not in contact with metal objects that could short-circuit them. A battery touching a coin, key, or metal clip could create a short circuit, which generates heat and could damage the battery or nearby items. Keep loose batteries in a plastic bag or battery case, or leave them in their original packaging until you're ready to use them.

Can I recharge an LR44 battery?

No. LR44 batteries are single-use alkaline cells and are not designed to be recharged. Attempting to recharge them can damage the battery, create a leak, or cause it to overheat. If you need a rechargeable option, look for devices that use rechargeable coin cells, though these are less common and usually more expensive.

Why do some LR44 batteries cost so much more than others?

Brand reputation, chemistry, and where you buy them all affect price. Duracell and Energizer charge more because of their brand name and marketing. Silver oxide batteries (AG13 or SR44) cost more than alkaline LR44s because they last longer. Buying from a drugstore costs more per battery than buying online in bulk. Store brands are usually the cheapest option and work just as well for most devices.