What is the difference between 377 and 377A?

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When referring to button cell batteries, the difference between 377 and 377A comes down to their internal chemistry, lifespan, and price. Both share identical physical dimensions (6.8 mm diameter × × 2.6 mm height) and can generally be used interchangeably in watches, toys, and small electronics.

Can I use a 377 battery instead of 377A?

377A is the alkaline version of 377 (silver oxide). Other than some very specialized devices, the batteries are interchangeable. 377's are more expensive, but they last longer, and the difference in price is not enough to make it worth changing them more often.

Are 377 and 377A the same size?

A: Yes, a 377 and a 377a are exact equivalents.

What battery can replace a 377?

The 377 battery is a 1.55V silver-oxide coin cell measuring 6.8 mm in diameter and 2.6 mm in thickness. It is primarily used in watches, calculators, and small electronic devices.

What is a 377A battery?

LR626 AG4 377 SR626SW 1.5V Button Cell Batteries (10 Pack) – Long Lasting Coin Batteries for Watches, Key Fobs, Scales, Toys & Small Electronics.

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23 related questions found

What is a 377 battery used for?

A 377 battery (also known as SR626SW) is a 1.55V silver oxide button cell primarily used for low-drain, long-life applications, most notably in analog wristwatches. Due to their compact size and steady power output, they are also commonly used in digital thermometers, calculators, small toys, and key fobs.

Is Energizer 377 the same as SR626SW?

Yes, the Energizer 377 is essentially the same as the SR626SW. They are different naming conventions for the identical coin cell battery size and can be used interchangeably.

What is the life expectancy of a 377 battery?

A 377 battery (also known as SR626SW) typically lasts 1 to 3 years in active use, depending on the device and usage frequency. In long-term storage, an unused silver-oxide 377 battery can hold its charge for 3 to 5 years.

What does 377 mean on a battery?

A 377 battery is a class of small rechargeable button cell batteries commonly used in smaller electronic devices. It is categorized as a silver oxide battery, which has its stable voltage and a long shelf life as compared to other chemistries.

Are 377 batteries button cell batteries?

For best results, store these 1.5V button cell batteries in a cool, dry place until you're ready to use them. Each 377 battery lasts up to five years in storage, so you can keep a stock conveniently on hand and ready when you need it.

What tools are needed to replace a 377 battery?

A. Tools Required

  • Small flat head screwdriver.
  • Small Philips head screwdriver.
  • Snap-back case opener.
  • Screw-back case opener.
  • Spring bar tool.
  • Scratch brush.
  • Watch battery size selector.

What is the most common watch battery size?

The most common watch battery size is the 377 (also known by its IEC code SR626SW). This tiny silver-oxide button cell is the universal standard for the vast majority of standard analog quartz watches.

What does 377 mean on a watch?

These watch button cells (also are known as coin cells) fit many sizes. For example, a size 377 battery is the equivalent of a SR626SW battery, which is also the same is a AG4 / SG4 battery.

What is the voltage of a 377 battery?

A 377 battery has a nominal voltage of 1.55 volts.

What AG number is a 377 battery?

The 377/376 button cell is a popular manufacturer's choice of batteries for watches, calculators, toys and talking children's books. These cells replace both alkaline and silver oxide cells with the names SR66, LR66, AG4, SG4 and SR626SW. These 1.55V batteries are based on silver oxide chemistry.

What replaces a 377 battery?

The 377 battery is a 1.55V silver-oxide coin cell measuring 6.8 mm in diameter and 2.6 mm in thickness. It is primarily used in watches, calculators, and small electronic devices.

What is the 80/20 rule for batteries?

The 20/80 battery rule is a guideline to prolong the lifespan of lithium-ion batteries. It recommends keeping your device charged between 20% and 80% most of the time to minimize internal voltage stress, prevent overheating, and reduce battery capacity degradation over time.

What are common uses for 377 batteries?

For watches, toys, glucose monitors and calculators.

What watch battery is compatible with a 377?

Class A 377 battery has longer battery life and longer power, providing reliable power for your equipment. Multiple compatibility: equivalent to the following brand models, such as SR626SW, 377, AG4, 377A, 626, SR626, LR66, LR626, 1.55V watch battery, 626SW, V377, 377 / 376, v376 / 377.

Is it worth fixing a quartz watch?

The movements are less complex, contain fewer parts, and require less specialized knowledge to service. Many quartz repairs can be completed in under an hour, making them significantly more affordable than mechanical watch service.

Are 10 year old batteries still good?

The bottom line: most quality alkaline batteries last 5-10 years in storage, while lithium batteries can maintain their charge for 10-15 years under proper conditions. However, the actual lifespan depends heavily on storage conditions, battery chemistry, and manufacturing quality.

What is a 377 battery?

A 377 battery is a small 1.55-volt silver oxide button cell (or coin) battery measuring 6.8mm in diameter and 2.6mm in thickness. It is primarily designed for low-drain, continuous-use devices like wristwatches, but is also used in calculators, medical monitors, and keyless car remotes.

Can I replace a watch battery myself?

Yes, you absolutely can replace a watch battery yourself! The process is usually very straightforward and cost-effective if your watch is a standard quartz model and you have the right tools.

How do I choose the right battery size?

The group size is the length, width, and height of the battery. Most vehicles will allow for more than one group size, so check your owner's manual to find which battery group sizes fit.