LR44 batteries are button cells that power small electronics like watches, calculators, hearing aids, and laser pointers

An LR44 battery is a 1.5-volt alkaline button cell about the size of a dime. It fits into devices with tight spaces where a standard AA or AAA battery won't work. The "LR" designation means it's alkaline, and "44" refers to its specific dimensions and chemistry. You'll find them in anything from a wristwatch to a glucose meter to a keychain flashlight.

These batteries are not rechargeable. Once the charge runs out, you replace the entire cell. A single LR44 typically lasts anywhere from a few months to over a year depending on how often the device runs and how much power it draws. Some devices use them continuously; others only when you actively use them.

Key Takeaways

  • LR44 batteries power watches, calculators, hearing aids, laser pointers, and small electronic toys that need a compact power source.
  • These are alkaline button cells rated at 1.5 volts and are not rechargeable, so you replace them when they die.
  • Battery life ranges from several months to over a year depending on the device's power draw and how often you use it.
  • LR44s are inexpensive and widely available at drugstores, supermarkets, and online retailers, usually costing between 50 cents and $2 per battery.
  • Some devices accept alternative button cell types like SR44 (silver oxide) or CR2032, so check your device manual before buying replacements.

Common devices that use LR44 batteries

Wristwatches are the most common use. Most analog and digital watches with a battery compartment on the back use an LR44 or a compatible button cell. If your watch stopped keeping time, the battery is usually the culprit.

Hearing aids often use LR44s, though some models use smaller cells like LR675 or LR13. Glucose meters, blood pressure monitors, and other medical devices frequently rely on LR44s because they're small, reliable, and hold a steady voltage. Laser pointers, keychain flashlights, and small electronic games also run on them. Some calculators, especially pocket-sized ones, use LR44s instead of solar power or larger batteries.

Toys with sound or light effects—musical greeting cards, light-up keychains, small handheld games—often contain LR44s. Camera flash units in older film cameras sometimes use them too. If a small device stops working and you can't see an obvious on-off switch or charging port, look for a battery compartment that might hold a button cell.

How long LR44 batteries last in different devices

Battery life depends on two things: how much power the device draws and how often you use it. A watch that runs 24 hours a day on minimal power might get 18 months or more from a single LR44. A laser pointer used occasionally could run for years on one battery. A hearing aid worn all day might need a fresh battery every week or two because hearing aids draw steady current.

Devices with continuous features—like a clock that displays the time at all times—drain the battery faster than devices you use only when you turn them on. A calculator you use for 10 minutes a day will outlast a laser pointer you use for an hour daily, even though the laser pointer might seem like the heavier user.

Temperature also matters. Batteries stored in cold environments discharge more slowly but may perform poorly when cold. Batteries in warm environments discharge faster. If a device hasn't been used in months, the battery may have lost charge even if the device was off.

Where to buy LR44 batteries and what they cost

LR44 batteries are sold at most drugstores, supermarkets, and big-box retailers in the pharmacy or electronics section. Walgreens, CVS, Target, and Walmart all stock them. You can also order them online from Amazon, eBay, or battery specialty sites. Prices typically range from 50 cents to $2 per battery depending on the brand and whether you buy a single cell or a pack of 10 or more.

Name brands like Energizer and Duracell cost more than store brands or generic alkaline button cells, but the performance difference is usually small for low-drain devices like watches. If you use LR44s regularly, buying a pack of 10 is cheaper per battery than buying singles. Some retailers offer bulk packs of 20 or 30 cells at a lower per-unit cost.

Hearing aid users and others who replace LR44s frequently may find subscription services or bulk ordering through medical supply companies worth the savings. Check whether your insurance covers hearing aid batteries—some plans do.

LR44 vs. SR44 and other button cell alternatives

An SR44 is a silver oxide button cell that looks identical to an LR44 but has different chemistry. It's rated at 1.55 volts instead of 1.5 volts and lasts longer in high-drain devices. Some watches and hearing aids work with either LR44 or SR44, but not all. Check your device manual or the battery compartment label before swapping them.

A CR2032 is a larger lithium button cell (3 volts) used in watches, calculators, and computer motherboards. It won't fit in a device designed for LR44s, and using the wrong voltage can damage the device. Other button cell types include LR43, LR41, and LR1130—each with different sizes and voltages for specific devices.

If your device originally came with an LR44, stick with LR44 or SR44 unless the manual says otherwise. If you're unsure, take the old battery to a retailer and ask for a match. Most pharmacies and electronics stores can identify the correct replacement by sight.

How to replace an LR44 battery

Most devices with LR44 batteries have a small compartment on the back or side held shut by a screw or a sliding cover. Use a coin or a small screwdriver to open it. Some compartments pop open with a fingernail. Remove the old battery—note which side faces up (usually the flat side faces out, the raised side faces the spring inside).

Clean the compartment with a dry cloth if it looks corroded or dirty. Insert the new battery in the same orientation as the old one. Close the compartment and test the device. If it doesn't work, try flipping the battery 180 degrees—you may have installed it backward.

If the device still doesn't work after replacing the battery, the problem may be a corroded battery contact, a broken spring, or a failed circuit. Corrosion looks like white or blue-green crusty buildup inside the compartment. You can sometimes clean it with a pencil eraser or a cotton swab dipped in vinegar, but if the device is old or inexpensive, replacement may be more practical than repair.

Storage and safety tips for LR44 batteries

Store LR44 batteries in a cool, dry place away from metal objects that could short-circuit them. A plastic bag or battery organizer works well. Don't store them loose in a drawer where they might touch coins or keys. Keep them away from heat sources and direct sunlight.

LR44 batteries are not toxic, but they contain alkaline material that can irritate skin or eyes if the battery leaks. If a battery leaks inside a device, wear gloves when cleaning it and wash your hands afterward. Don't throw used batteries in the trash—many retailers have battery recycling programs. Walgreens, Best Buy, and Home Depot accept used batteries for free recycling.

Keep LR44 batteries away from children and pets. A child who swallows a button battery needs emergency medical care. If swallowing occurs, call Poison Control at 1-800-222-1222 or go to the emergency room when ready.

Frequently Asked Questions

Can I use an SR44 battery instead of an LR44?

Many devices work with both, but not all. SR44 is slightly higher voltage (1.55V vs. 1.5V) and lasts longer in high-drain devices. Check your device manual or the battery compartment label. If it says "LR44 or SR44", you can swap them. If it specifies only LR44, stick with that to avoid damaging the device.

How do I know when an LR44 battery is dead?

The device stops working or works intermittently. A watch stops keeping time, a calculator won't turn on, a laser pointer won't light up. Some devices have a low-battery indicator, but most don't. If a device worked before and suddenly doesn't, the battery is usually the first thing to replace.

Why is my LR44 battery leaking?

Alkaline batteries leak when they're old, stored in hot conditions, or left in a device that isn't used for months. Leakage damages the device's contacts and can corrode the circuit board. Remove the leaking battery when ready, clean the compartment with a dry cloth, and don't use the device until it's dry. Recycling the old battery prevents it from leaking further.

Are all LR44 batteries the same?

All LR44s have the same voltage (1.5V) and size, but brands differ in longevity and reliability. Energizer and Duracell last slightly longer than generic brands in most devices, but the difference is small for low-drain uses like watches. For hearing aids or medical devices, name brands may be worth the extra cost because battery failure is more disruptive.

Can I recharge an LR44 battery?

No. LR44 batteries are alkaline and not designed to be recharged. Attempting to recharge them can cause them to leak or rupture. If you use LR44s frequently, buying in bulk is more economical than trying to recharge them. Some devices use rechargeable button cells, but those are different types (usually marked NiMH or Li-ion) and won't work in an LR44 slot.