The SR626SW battery is equivalent to several other button cell batteries, including 377, AG4, and LR626.
If you’ve ever had a watch stop ticking or a small device run out of juice, chances are it uses a battery like the SR626SW. These tiny but powerful silver oxide batteries are commonly used in wristwatches, medical devices, calculators, and various electronics. However, finding a direct replacement can be confusing due to the multiple names and codes used by different manufacturers.
Best SR626SW Battery Equivalents and Their Top Replacements
The SR626SW battery is known by several equivalent names, depending on the manufacturer or battery chemistry. Understanding these equivalents helps you confidently replace it without compatibility issues. Let’s explore the most common equivalents and the best options for each.
377 Battery – Recommended: Energizer 377 Silver Oxide Button Cell
The 377 battery is a direct equivalent of the SR626SW in silver oxide chemistry, offering stable voltage and longer shelf life.
Why we recommend it:
Energizer is a household name in battery reliability. Their 377 button cell delivers consistent power and comes with a shelf life of up to 5 years, making it ideal for watches, calculators, and glucose monitors. It’s mercury-free, which makes it safer for the environment without sacrificing performance.
AG4 Battery – Recommended: Maxell AG4 Alkaline Battery
The AG4 is an alkaline alternative to the SR626SW, often used in low-drain devices.
Why we recommend it:
Maxell’s AG4 is a dependable choice for less power-hungry electronics like LED toys or digital thermometers. Though it has a shorter lifespan compared to silver oxide versions, it’s a more affordable option for general-use applications.
LR626 Battery – Recommended: Tianqiu LR626 Alkaline Button Cell
The LR626 is another alkaline equivalent of the SR626SW and is commonly found in budget-friendly devices.
Why we recommend it:
Tianqiu LR626 batteries are a popular, cost-effective replacement for SR626SW, especially for bulk buyers or single-use gadgets. While not as long-lasting as silver oxide versions, they perform reliably for short-term needs.
SR626SW Battery Specifications and Why They Matter
To ensure you’re choosing the correct replacement, it’s crucial to understand the specifications of the SR626SW battery. These details affect everything from performance to device compatibility.
Key Specifications of SR626SW
- Size: 6.8 mm diameter × 2.6 mm height
- Voltage: 1.55V (Silver Oxide)
- Chemistry: Silver Oxide (commonly), but alkaline versions also exist
- Capacity: Typically ranges from 25 to 30 mAh
- Polarity: Flat side is the positive terminal
Why These Specs Are Important
- Size Matching: The SR626SW is classified as a Type 377 button cell in IEC standards. If the physical size is even slightly off, the battery may not fit securely or make proper contact with terminals, which can cause malfunctioning or intermittent power supply.
- Voltage Consistency: Silver oxide versions provide a steady 1.55 volts, which is vital for sensitive electronics like watches and medical tools. In contrast, alkaline versions (AG4, LR626) start at 1.5 volts but gradually drop, leading to shorter performance cycles.
- Chemistry Difference: Silver oxide batteries (like the SR626SW and 377) are known for better longevity and a flatter discharge curve. Alkaline options (AG4, LR626) are cheaper but deplete faster and don’t maintain a consistent voltage.
- Device Sensitivity: Devices like high-end digital watches or glucometers need precise voltage and cannot tolerate power fluctuations, making silver oxide versions the better choice.
Silver Oxide vs. Alkaline: Which Is Better for SR626SW Replacements?
When replacing an SR626SW battery, you’ll often face a choice between silver oxide and alkaline chemistry. Both types are compatible in size, but their performance varies significantly.
Silver Oxide (e.g., 377, SR626SW)
- Stable Voltage: Silver oxide batteries deliver a constant 1.55V throughout their lifespan.
- Longer Lifespan: Typically last 30-50% longer than alkaline counterparts.
- Flatter Discharge Curve: Voltage stays stable until the end, reducing the risk of device malfunction.
- Ideal For: Watches, glucometers, and other devices requiring precision and reliability.
Alkaline (e.g., AG4, LR626)
- Initial Voltage: 1.5V, but it drops gradually as the battery drains.
- Shorter Lifespan: Cheaper, but drains quicker, especially in power-hungry devices.
- Inconsistent Performance: Not suitable for sensitive electronics where voltage consistency is key.
- Ideal For: Toys, calculators, or other low-drain, non-critical devices.
Which Should You Choose?
If your device is sensitive to power fluctuations or you’re looking for a longer-lasting, high-performance option, silver oxide is the better investment. While alkaline equivalents are more affordable, they are better suited for short-term or disposable gadgets.
Pro tip: Always check your device manual. If it originally came with a silver oxide battery, stick with that chemistry for the best performance.
How to Safely Replace an SR626SW Battery
Replacing an SR626SW battery may seem simple, but doing it the right way ensures your device remains functional and undamaged. Whether it’s a watch or a small gadget, a little care goes a long way.
Tools You’ll Need
- Small flathead screwdriver or case opener
- Plastic tweezers (avoid metal to prevent short circuits)
- Clean cloth or microfiber pad
- Replacement SR626SW or equivalent battery
Turn Off and Clean Your Device
If your device has a power button, turn it off. Use a soft cloth to clean any dust or debris from the battery compartment.
Open the Battery Compartment
Use a small screwdriver or watch case opener to carefully remove the battery cover. Be gentle to avoid scratching or bending components.
Remove the Old Battery
Carefully use plastic tweezers to lift the old battery out. Avoid touching it with your fingers to prevent residue or corrosion.
Check Orientation
Note the battery’s orientation (positive and negative ends) before inserting the new one.
Insert the New Battery
Place the new SR626SW (or equivalent) in the same orientation. Press it in gently but securely.
Close and Test
Replace the battery cover and test your device to make sure everything is working properly.
Safety Tips
- Dispose of old batteries properly. Use a local battery recycling facility.
- Never mix battery chemistries. Always replace with the same type if possible.
- Avoid moisture and static. They can damage internal components.
Where to Buy SR626SW Battery Equivalents: Online and Local Options
When it comes to buying an SR626SW or its equivalents (377, AG4, LR626), you’ve got several reliable options — both online and in physical stores. But where you buy matters just as much as what you buy.
Trusted Online Stores
- Amazon – A convenient option with multiple sellers and brands. You can read reviews, compare prices, and often get fast shipping.
- Battery Junction – Specializes in batteries of all kinds. Great for bulk purchases and brand-specific shopping.
- Walmart Online – Offers both individual and multi-pack deals from trusted brands like Energizer and Maxell.
Local Stores
- Pharmacies (e.g., Walgreens, CVS): Often stock watch and medical device batteries like SR626SW.
- Electronics Stores (e.g., Best Buy, RadioShack): Good option for last-minute replacements.
- Jewelry and Watch Shops: These stores not only sell batteries but often install them for free or a small fee.
What to Watch Out For
- Avoid No-Name Brands: Cheap batteries can leak or underperform.
- Check Expiry Dates: Always buy fresh stock to ensure maximum shelf life.
- Watch for Bundle Deals: Multi-packs can save money, especially if you use the battery often.
Whether you’re buying online or locally, always double-check the chemistry and size to make sure it’s truly equivalent to SR626SW. A little caution upfront can save time, money, and device damage.
Conclusion
Choosing the right SR626SW battery equivalent doesn’t have to be confusing. Whether you go with the reliable 377, the affordable AG4, or the accessible LR626, understanding the differences in chemistry, voltage, and performance ensures your device runs smoothly. Silver oxide batteries like the SR626SW and 377 offer steady voltage and longer life, making them ideal for watches and medical tools. Meanwhile, alkaline options like AG4 and LR626 work well for lower-priority devices.
By paying attention to specifications and selecting a reputable seller, you protect your electronics from underperformance or damage. And with safe replacement practices, your battery swap can be quick and hassle-free.
Frequently Asked Questions About SR626SW Battery Equivalents
What batteries are equivalent to SR626SW?
The most common equivalents are 377 (silver oxide), AG4, and LR626 (both alkaline). All three share the same size and can be used interchangeably in many devices. However, silver oxide types generally offer better performance and a longer lifespan.
Can I use an alkaline battery like AG4 instead of SR626SW?
Yes, but with limitations. AG4 and LR626 are alkaline alternatives, meaning they may not last as long and can have inconsistent voltage output. If your device is sensitive or high-end (like a digital watch or medical tool), it’s better to stick with a silver oxide battery like the 377.
How long does an SR626SW battery typically last?
The average lifespan is 1 to 2 years, depending on the device and usage. Silver oxide batteries like SR626SW tend to last longer than alkaline versions, especially in low-drain applications.
Are there any risks in using non-branded or off-brand equivalents?
Yes. Non-branded or extremely cheap equivalents may leak, drain quickly, or damage your device. Always opt for trusted brands like Energizer, Maxell, Renata, or Sony to ensure safety and performance.
Where can I recycle old SR626SW batteries?
Most pharmacies, electronics stores, and local recycling centers accept button cell batteries for recycling. Avoid throwing them in the trash, as they contain small amounts of hazardous materials.