Everything You Need to Know About the LR626 Battery

Batteries are the unsung heroes of our everyday gadgets. From the tiny button cell in your wristwatch to the power packs in your camera or medical devices, batteries quietly keep our lives running without much credit. But have you ever looked at one of those small, round batteries and noticed a code like “LR626” printed on the side?

What does that even mean?

If you're curious, and who wouldn't be?, let’s break it down and uncover what LR626 actually stands for—and why it matters for your devices.

What Does “LR” Mean on a Battery, And Why Is It Called “LR626”?

When you see the letters “LR” printed on a small round battery, it might seem like a random code, but it tells you a lot about the battery's chemistry and shape.

• “L” stands for alkaline chemistry, one of the most common and affordable types of battery chemistry available. Alkaline batteries are known for their reliability in everyday, low-drain devices like clocks, toys, and remote controls.

• “R” means round, referring to the shape of the battery. This is typically used for button cells or coin cells—those tiny, flat, circular batteries often found in small electronics.

• 626 = The first two digits (62) represent the battery’s diameter in tenths of a millimeter—6.2 mm, rounded to 6.8 mm in practice, and the last digit (6) stands for the height, which is approximately 2.6 mm 

The “626” portion is shared by other batteries of similar size but different chemistry—for example, the SR626, which uses silver-oxide instead of alkaline. That’s why understanding this naming convention can help you select the right battery for your specific device.

LR626 Battery Specifications

Let’s take a closer look at what makes the LR626 a reliable power source. Despite its small size, this button cell delivers solid performance for a range of compact electronic devices. Here’s a breakdown of its key specifications and what they mean:

• Diameter: The LR626 has a compact, round form factor with a diameter of just 6.8 millimeters. This makes it suitable for devices where space is extremely limited, such as wristwatches, small calculators, and digital thermometers.

• Height / Thickness: With a thickness of only 2.6 mm, the LR626 is a low-profile battery. Its slim design allows it to fit seamlessly into thin gadgets without adding unnecessary bulk.

• Nominal Voltage: This battery provides a nominal voltage of 1.5 volts, typical for alkaline chemistry. While it delivers enough power for low-drain electronics, the voltage gradually declines during use, which can affect performance in voltage-sensitive devices.

• Capacity: Capacity refers to how much energy the battery can store. The LR626 holds approximately 18 to 19 milliampere-hours (mAh), with some premium versions reaching up to 20 mAh. This is sufficient for powering devices like watches and small remotes over extended periods.

• Weight: Weighing just over one gram, the LR626 is extremely lightweight. This makes it ideal for portable devices where minimizing weight is important.

• Chemistry: The battery uses a manganese-alkaline chemical composition. This type of chemistry is cost-effective and works well for everyday applications. However, compared to silver-oxide alternatives, alkaline batteries tend to have a shorter lifespan and less stable voltage output.

• Operating Temperature: The LR626 can operate in a wide temperature range, from -18°C to 55°C. This makes it dependable for most consumer and industrial uses, although performance may drop in extreme cold.

What Uses an LR626 Battery

The LR626 battery is a small but powerful component found in a wide range of compact electronic devices.

• Watches and Timepieces: The LR626 is frequently used in analog and digital wristwatches. Its compact size and sufficient capacity make it ideal for maintaining accurate time over long periods without the need for frequent replacements.

• Calculators: Basic calculators, especially handheld or solar-assisted models, often rely on LR626 batteries. These devices require minimal power, allowing the battery to last for extended periods.

• Digital Thermometers: Many ear and oral digital thermometers use LR626 batteries due to their small size and reliable output. These medical devices require a compact power source with consistent voltage during operation.

• Laser Pointers and Small LED Lights: Some miniature laser pointers and compact LED lights use LR626 batteries. While these devices don’t run continuously, they require quick bursts of energy, which alkaline batteries like the LR626 can deliver efficiently.

• Hearing Aids: While most modern hearing aids use specialized zinc-air or lithium batteries, some older or budget hearing amplifiers may use LR626 batteries, particularly in simpler models.

• Toys and Small Gadgets: Children’s toys, novelty items, and keychain gadgets often utilize LR626 batteries. These devices typically operate on low voltage and intermittent usage, making the battery a cost-effective choice.

• Remote Controls: Tiny remote controls—such as those for car keys, LED lights, or Bluetooth devices—sometimes use LR626 batteries. The battery provides enough power to maintain signal strength during short bursts of use.

• Cameras and Optical Instruments: Certain compact cameras, light meters, and microscopes use LR626 cells for powering internal displays or memory functions. In these devices, long shelf life and dependable voltage are crucial.

• Emergency Equipment: Some emergency medical tools or backup components, such as blood sugar meters or compact flashlights, may rely on LR626 batteries due to their long shelf life and availability.

LR626 Battery Equivalents

The LR626 battery goes by many names depending on the manufacturer and chemistry. If you're searching for a replacement, these equivalents might show up:

• AG4

• LR66

• 177

• 376, 377 (usually silver-oxide types)

• 1176SO (IEC standard for alkaline)

• GP177, GP377, GP7, GP77

• 626, 626A, A1398

LR626 vs. SR626 Battery

When you’re replacing a button cell battery, you might come across both LR626 and SR626 options. At first glance, they look identical—they're the same size and fit in the same devices. But under the surface, there are key differences that can significantly affect your device’s performance, especially in sensitive electronics.

Which Is Better, LR or SR Battery

If you're after better performance and a longer life, go for the SR battery. The SR626 holds its voltage better over time, which is crucial for devices like digital watches or medical tools that need consistent power.

The LR626, on the other hand, is a more affordable option for basic devices. Just remember—it's voltage drops steadily as it discharges, so it’s not ideal for voltage-sensitive electronics.

Tips for Choosing the Right LR626 Battery

• Buy from trusted sellers: Always purchase from reliable vendors connected to reputable manufacturers to avoid counterfeits and low-quality batteries. Suppliers like Chipsmall are worth considering for their reputation and verified sourcing.

• Check compatibility: Ensure the battery matches your device’s size and voltage requirements (6.8 mm × 2.6 mm, 1.5V).

• Choose the right chemistry: For better performance and longer life, consider silver-oxide (SR626) if your device supports it.

• Avoid mixing batteries: Don’t combine old and new or different chemistries in the same device.

• Store properly: Keep spare batteries in a cool, dry place and check expiry dates.

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FAQs

Q1: Can I replace an SR626 battery with an LR626?
A: Technically, yes, but it’s not recommended unless the device allows it. LR626 has less voltage stability and a shorter life.

Q2: What devices use LR626 batteries?
A: They're commonly found in watches, calculators, thermometers, small remote controls, and other compact electronics.

Q3: What is the voltage of an LR626 battery?
A: The nominal voltage is 1.5 volts.

Q4: Are LR626 batteries rechargeable?
A: No, these are non-rechargeable alkaline batteries.

Q5: How long do LR626 batteries last?
A: It depends on usage, but expect a shorter life than a silver-oxide version due to the gradual voltage drop.

Final Thoughts

So, next time you see “LR626” printed on a button cell, you won’t be left guessing. You’ll know it’s more than just a code—it’s a compact, dependable power source designed for precision in small electronics.

Choosing the right battery might seem minor, but it can significantly affect your device’s performance and longevity. Stick with quality, check compatibility, and always buy from trusted sources.