SR626SW Watch Battery: SR626SW Equivalent & Specifications

SR626SW Watch Battery: SR626SW Equivalent & Specifications
Post Date:2024-10-17,

The SR626SW battery is widely used in watches and other small devices. It is known for its long-lasting performance and reliability. Whether you need to replace your watch battery or find an equivalent option, understanding the specifications and benefits of the SR626SW battery can help you make the best choice. This guide provides insights into the SR626SW battery, answers common questions, and discusses equivalent options for a smooth replacement process.


What is SR626SW Battery?

The SR626SW is a small, coin-shaped silver oxide battery widely used in wristwatches, small electronics, and precision instruments. It is favored for its reliability and compact size, making it a perfect fit for devices where space is limited. Silver oxide batteries like the SR626SW have a steady voltage output and longer shelf life, which is why they are often chosen for timepieces requiring accurate timekeeping over long periods. Unlike alkaline batteries, silver oxide batteries provide consistent power until they are fully discharged.

SR626SW Watch Battery: SR626SW Equivalent & Specifications


The "SR" in SR626SW refers to the battery's silver oxide chemistry, and the "SW" indicates that it is suited for low-drain devices, such as analog watches. This type of battery is also mercury-free, making it a more environmentally friendly choice. With its small dimensions, the SR626SW is frequently found in watches, calculators, hearing aids, and other compact electronic devices that demand precision and longevity.


SR626SW Specification

The SR626SW battery has specific technical features that suitable for low-drain devices. Here are its key specifications:

Specification

Details

Battery Type

Silver Oxide

Nominal Voltage

1.55V

Capacity

25-30 mAh

Diameter

6.8 mm

Height

2.6 mm

Weight

0.3 grams

Operating Temperature

-10°C to +60°C

Self-discharge rate

Low

Application

Watches, small electronics

The low self-discharge rate ensures that SR626SW batteries maintain their charge for long periods when not in use, extending their shelf life.


What Does SR626SW Mean?

The name SR626SW can be broken down to understand its meaning:

l S stands for "Silver Oxide," the battery's chemistry.

l R refers to its round shape.

l 626 is the size code, indicating its dimensions.

l SW means "Low Drain," signifying that this battery is designed for devices with low energy consumption, like analog watches.


Benefits of SR626SW Watch Batteries

The SR626SW battery offers multiple advantages, particularly when used in watches and other precision devices. Here are some of the key benefits:


1. Long-Lasting Power

SR626SW batteries offer a stable and steady energy supply, so that your watch keeps running accurately for extended periods without frequent battery changes. The silver oxide chemistry gives it an edge in long lifespan compared to alkaline batteries.


2. Stable Voltage Output

From the above table, we know the battery provides a consistent 1.55V voltage. It is important for devices like watches that require a steady power supply to function correctly. The stable output prevents sudden drops in performance.


3. Small and Compact

Despite its small size, the SR626SW battery delivers dependable power. So, it can be fitted even the smallest watches and electronic gadgets without compromising performance.


4. Environmentally Friendly

SR626SW batteries are mercury-free, and this is safer for the environment. They are a better choice for environmentally conscious users who want reliable performance without harmful chemicals.


5. Leak-Resistant

Due to its sealed package design, the SR626SW is less prone to leakage. It can reduce the risk of damage to your device like in delicate electronics, especially valuable watches.


6. Affordable

SR626SW batteries are widely available and cost-effective. It is a practical choice for regular battery replacements without breaking the bank.


Is SR626SW the Same as 377?

Yes, the SR626SW is often considered the same as the 377 battery.

Both share the same size, voltage, and chemistry, making them interchangeable in most devices. Here’s a closer look at how the two are similar:

l Size: Both the SR626SW and 377 have identical dimensions (6.8 mm diameter and 2.6 mm height), so they fit into the same devices.

l Voltage: Both batteries provide a steady 1.55V output.

l Chemistry: Both use silver oxide technology, they do have a good longevity compared to alkaline batteries.

The only real difference is in the naming conventions. Some manufacturers may label their batteries as 377, while others may use SR626SW. When replacing a watch battery, you can safely use either of the two without worrying about compatibility issues.


What Watch Battery is Equivalent to SR626SW?

Here are common equivalents for the SR626SW battery. These equivalents are chemically and physically similar, offering the same performance and size:

Equivalent Battery

Chemistry

Voltage

Diameter (mm)

Height (mm)

Typical Usage

Common Manufacturer Codes

377

Silver Oxide

1.55V

6.8 mm

2.6 mm

Watches, small electronics

Energizer 377, Maxell SR626SW, Renata 377

SR66

Silver Oxide

1.55V

6.8 mm

2.6 mm

Timepieces, calculators

Sony SR66, Toshiba SR626SW, Panasonic SR626SW

SB-AW

Silver Oxide

1.55V

6.8 mm

2.6 mm

Watches, hearing aids

Seiko SB-AW

AG4 (LR626)

Alkaline

1.5V

6.8 mm

2.6 mm

Calculators, toys

LR626, GP77A, L626, Varta V377

LR626

Alkaline

1.5V

6.8 mm

2.6 mm

Low-power devices

LR626, AG4, 177, L626, RW329

These equivalents can be used interchangeably with the SR626SW battery in most devices, including watches, calculators, and more.


What is the Difference Between LR626 and SR626SW?

The LR626 and SR626SW are two similar-sized batteries but with distinct differences in their chemistry and performance.

1. Chemistry

l LR626 is an alkaline battery, which is typically cheaper but offers a shorter lifespan. It also delivers less stable voltage over time, meaning that devices powered by LR626 batteries may experience performance fluctuations as the battery drains.

l SR626SW is a silver oxide battery, which provides a more stable voltage throughout its life. It lasts significantly longer than its alkaline counterpart and is better suited for low-drain devices like watches.


2. Lifespan

l LR626: Alkaline batteries like the LR626 tend to lose their power quicker, typically lasting a few months to a year in most devices.

l SR626SW: Silver oxide batteries, such as the SR626SW, can last 1-3 years, depending on usage and the type of device.


3. Cost

l LR626: Generally less expensive upfront, but since they don’t last as long, they need to be replaced more frequently.

l SR626SW: Slightly more expensive but offers better long-term value due to its longer life and consistent performance.


Overall, if you need a longer-lasting, more stable battery for a watch or similar device, the SR626SW is the better choice. However, if you're in a pinch, LR626 can work as a temporary replacement, but it won't last as long.


How Long Do SR626SW Batteries Last?

SR626SW batteries typically last between 1 to 3 years, depending on the power consumption of the device in which they are used. Watches, especially simple analog models, are low-drain devices and can make the most out of the SR626SW battery’s long lifespan. However, watches with added features like alarms, chronographs, or lights may consume more power, leading to a shorter battery life.


One key factor in the SR626SW battery’s longevity is its silver oxide composition, which delivers a steady and reliable voltage throughout its life. This prevents significant drops in power output until the battery is nearly depleted.


What is the Difference Between W and SW Watch Battery?

The letters "W" and "SW" on watch batteries indicate the type of drain they are designed for:

W (High Drain): This type of battery is designed for digital watches or devices that require more power to operate. Watches with additional functions like alarms, lights, or chronographs typically use "W" batteries.


SW (Low Drain): The "SW" indicates low-drain devices, such as analog watches. These batteries are optimized for devices that consume minimal power, have a long-lasting performance without unnecessary energy waste.


If your watch is a simple analog model, an "SW" battery will suffice. However, if your watch has high-energy features, a "W" battery is the better option.


How Do I Tell What Watch Battery I Need?

To find the right battery for your watch, look for the battery code printed on the back of the old battery or in the user manual. Alternatively, many watch models have their battery information listed online. Always match the size and voltage of the replacement battery with the original to avoid any issues. Here are the four ways for your reference.


1. Check the Old Battery

Most watch batteries have the model number printed on their surface. If you have the old battery, look for the code (such as SR626SW or 377) to find the correct replacement.


2. Refer to the Watch Manual

The user manual for your watch should list the specific battery type required for your model.


3. Look Online

Many watch brands provide information on their websites or offer support services to help you find the correct battery.


4. Consult a Watch Technician

If you’re unsure, take your watch to a professional. They can help you identify the correct battery and install it for you.


How to Replace SR626SW Watch Battery?

If your battery is bad and want to replace with a new one b yourself, you can follow step-by-step guide to replacing your SR626SW watch battery as below:

1. Gather Your Tools: You will need a small watch screwdriver, tweezers, and the new SR626SW battery.

2. Open the Watch Case: Use the screwdriver to carefully open the back cover of your watch. Be cautious to avoid scratching the case or damaging the components.

3. Remove the Old Battery: Gently use the tweezers to lift out the old battery from its slot. Take note of the battery's orientation before removing it.

4. Insert the New Battery: Place the new SR626SW battery into the compartment, ensuring it’s positioned in the same way as the old one.

5. Close the Case: Reattach the back cover and screw it in place. Ensure that the cover is securely fastened to prevent water or dust from entering.

6. Check the Watch: Once replaced, check to ensure the watch is working properly.

If you’re unsure about the process, it’s best to visit a jeweler or watch technician.


Where to Buy Watch Battery SR626SW?

SR626SW batteries are available at most electronics stores, watch repair shops, and online retailers. It's always a good idea to buy from a reputable brand or online retailer like Amazon, eBay or Jinftry to ensure you're getting a fresh, high-quality battery that will last.


FAQs about SR626SW battery

1. Can I Use SR626SW Instead of SR621SW?

No, SR626SW and SR621SW are not interchangeable. The SR621SW is smaller in size (6.8 mm diameter vs. 6.1 mm diameter), so it won't fit into devices designed for the SR626SW. Always use the correct size for your watch to avoid issues.


2. Can I Use SR371 Instead of SR626SW?

No, the SR371 battery is different in both size and voltage from the SR626SW. Using the wrong battery type can damage your device or cause it to malfunction.


3. How do I properly dispose of SR626SW batteries?

SR626SW batteries should be recycled at a proper recycling facility or electronics store with a battery recycling program. Avoid throwing them in the trash, as they contain chemicals that can be harmful to the environment.


4. Are SR626SW batteries mercury-free?

Yes, most modern SR626SW batteries are mercury-free, making them an environmentally friendly option compared to older mercury-based button cells.


5. How can I tell if my SR626SW battery needs replacing?

If your watch or device is losing power, running slow, or stops working, it's time to replace the SR626SW battery. In watches, a fading display or reduced time accuracy are signs the battery is depleting.

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