AG13 and LR44 Are the Same Battery, Just Different Names

Yes, AG13 and LR44 batteries are identical. They are the same physical battery with two different naming systems. AG13 is the IEC (International Electrotechnical Commission) designation, while LR44 is the ANSI (American National Standards Institute) designation used mainly in North America. Both refer to a 1.5-volt alkaline button cell battery with the same dimensions, capacity, and performance.

You will find these batteries labeled as either AG13 or LR44 depending on the manufacturer and region. Some packages may even list both names on the label. The battery itself works identically in any device designed for either designation, so you can use them interchangeably without any concern about compatibility or performance.

Key Takeaways

  • AG13 and LR44 are the same 1.5-volt alkaline button cell battery sold under two different naming standards.
  • You can use AG13 and LR44 batteries interchangeably in any device that calls for either one.
  • The battery measures 11.6 mm in diameter and 5.4 mm in thickness, which is the same regardless of which name appears on the package.
  • Other common names for this same battery include A76, PX76, and SR44, though SR44 is silver oxide and performs differently in some devices.

What the Naming Systems Mean

The IEC system (used internationally) assigns letter codes based on battery chemistry and size. The "A" in AG13 indicates an alkaline battery, and the "G" refers to the button cell shape and size category. The "13" is a sequential number within that category. This system is used primarily in Europe and other regions following international standards.

The ANSI system (used in North America) uses "LR" to indicate an alkaline battery, with "L" standing for alkaline and "R" for round. The "44" refers to the specific dimensions and capacity. This naming convention is what you will typically see on battery packages sold in the United States and Canada.

Physical Specifications and Voltage

Both AG13 and LR44 batteries measure 11.6 millimeters in diameter and 5.4 millimeters in thickness. They deliver 1.5 volts of power and typically provide between 150 and 200 milliamp-hours of capacity, depending on the manufacturer and the drain rate of the device using them. The actual performance is nearly identical across quality brands.

The button cell shape makes these batteries ideal for small devices like watches, calculators, hearing aids, laser pointers, and electronic toys. The compact size and reliable voltage output are why they remain one of the most commonly used battery types for these applications.

Common Devices That Use AG13 or LR44 Batteries

You will find AG13 and LR44 batteries in a wide range of everyday items. Watches, both digital and analog, frequently use these batteries. Calculators, especially small pocket models, rely on them. Hearing aids, laser pointers, electronic car key fobs, digital thermometers, and small LED flashlights all commonly use this battery type.

Some electronic toys and games also use AG13 or LR44 batteries, particularly those with small light-up features or sound modules. Before purchasing a replacement, check the device manual or look inside the battery compartment for the specific battery type listed. Most devices will clearly label which battery they require.

Other Names for This Battery and How They Differ

You may encounter other designations for button cell batteries that look similar but are not identical. A76 and PX76 are alternative names for the same AG13/LR44 alkaline battery and work exactly the same way. However, SR44 is a different battery entirely—it is a silver oxide battery that delivers 1.55 volts instead of 1.5 volts and lasts longer in high-drain devices.

The SR44 will physically fit in a device designed for AG13 or LR44, but the slightly higher voltage can cause problems in some sensitive electronics like watches or hearing aids. For this reason, always use the exact battery type your device specifies. If your device calls for AG13 or LR44, stick with those; if it calls for SR44, use that instead.

How to Store and Handle AG13 and LR44 Batteries

Store AG13 and LR44 batteries in a cool, dry place at room temperature. Avoid storing them in direct sunlight or in damp environments, as moisture can corrode the battery terminals and reduce performance. A sealed container or plastic battery organizer works well for keeping multiple batteries organized and protected.

When inserting the battery into a device, note the polarity markings inside the battery compartment. The positive side (marked with a plus sign) should face up or toward the marked positive terminal. Installing the battery backward will prevent the device from working and may damage it. Always remove batteries from devices you do not plan to use for extended periods, as they can leak and damage the device.

Frequently Asked Questions

Can I use an SR44 battery instead of an LR44?

SR44 will fit physically, but it is not recommended. SR44 is silver oxide and delivers 1.55 volts compared to the 1.5 volts of LR44. The higher voltage can damage sensitive devices like watches or hearing aids. Use only the battery type your device specifies.

How long do AG13 and LR44 batteries last?

Lifespan depends on the device and how much power it draws. In a watch, they typically last one to three years. In a calculator used occasionally, they may last several years. High-drain devices like hearing aids may need replacement every few weeks to months.

Are there rechargeable versions of AG13 or LR44 batteries?

Rechargeable button cell batteries exist, but they are usually NiMH chemistry and deliver 1.2 volts instead of 1.5 volts. This lower voltage can cause some devices to malfunction or perform poorly. Check your device manual before using rechargeable batteries.

What should I do with old AG13 or LR44 batteries?

Do not throw them in regular trash. Most communities have battery recycling programs through electronics retailers, hazardous waste collection sites, or municipal drop-off centers. Call your local waste management office or search online for battery recycling locations near you.

Why do some packages say AG13 and others say LR44 if they are the same?

Different regions and manufacturers use different naming standards. European and international manufacturers typically use AG13, while North American manufacturers use LR44. Both names refer to the identical battery, so either label is correct.