SR626SW Battery Replacement Guide

Replacing an SR626SW watch battery is straightforward with the right tools and care. This guide covers the steps, tools needed, and when to seek professional help.

Many people replace their own watch batteries at home with minimal risk. The key is using the correct battery type, handling tools correctly, and knowing when a professional should take over. With a few minutes and the right supplies, you can extend the life of your timepiece.

When to Replace

Replace the battery when your watch stops, runs slow, or the second hand moves in two-second jumps (common low-battery indicator on quartz watches). Most SR626SW batteries last 1–3 years in typical use.

Simple analog watches often last 2–3 years. Watches with backlights, alarms, or multiple functions may drain the battery faster. If your watch is new and the battery dies within months, there may be a defect—consider having it checked by a watchmaker. Storing batteries properly (cool, dry place) before use also helps maintain shelf life.

Tools You Need

• Case opener — For screw-down or snap-off case backs; choose a tool that matches your watch type
• Plastic or nylon pry tool — To avoid scratching the case when prying snap-off backs
• Tweezers — Non-magnetic preferred for handling the battery; metal tweezers can short the cell
• New SR626SW battery — Silver-oxide recommended; see our equivalents page for compatible types

Watch repair kits are available online and include most tools needed. A small magnifying glass or loupe can help when working with tiny batteries. Work in a well-lit area and keep the workspace organized so you do not lose small parts.

Choosing the Right Case Opener

Screw-down case backs require a case opener with interchangeable dies that match the notches in the back. Common die sizes include 2.0mm, 2.5mm, and 3.0mm. If your opener does not fit snugly, the tool can slip and scratch the case. Snap-off backs use a different approach: a thin blade or pry tool inserted into a small notch.

Some watches have a coin-edge back that unscrews with gentle pressure. Others have a hinged back. Identify your watch type before attempting to open it. Wrong tools can damage the case or leave visible marks. When unsure, a jeweler can open it for a small fee.

Step-by-Step Replacement

1. Work on a clean, well-lit surface. Place a soft cloth to protect the watch from scratches. Avoid working over carpet where small parts can disappear.
2. Open the case back. For screw-down backs, use a case opener with the correct die size; turn counterclockwise. For snap-off backs, insert a pry tool into the notch and gently lift. Some watches have a small indentation for this.
3. Remove the old battery with tweezers. Note the orientation (positive side usually faces up). If the battery compartment has a small clip or retainer, gently remove it first.
4. Insert the new SR626SW with the correct polarity. The positive (+) side typically faces up. Do not touch the battery with bare fingers; skin oils can affect performance and cause corrosion.
5. Replace the case back and ensure it seals properly. For screw-down backs, tighten firmly but do not over-tighten. For snap-off backs, press evenly until it clicks into place.

Safety and Handling Tips

Never force a battery into a compartment—if it does not fit easily, you may have the wrong size. Swallowing button cells is dangerous; keep them away from children. Used batteries should be recycled at designated collection points; do not dispose of them in regular trash.

If the watch has a plastic or rubber gasket around the case back, ensure it is seated correctly before closing. Damaged gaskets can compromise water resistance. For water-resistant watches, consider having the battery replaced by a professional who can reseal and pressure-test the case.

When to See a Professional

Seek a jeweler or watchmaker if the case back is difficult to open, the watch is water-resistant and requires special tools, or you are unsure about the correct battery type. Water-resistant watches need proper resealing to maintain their rating.

Luxury or complicated watches may have warranty implications if opened by non-authorized personnel. If the battery compartment is corroded or the watch still does not work after a new battery, a professional can diagnose and repair. Corrosion can indicate a leaky old battery or moisture ingress—both warrant professional attention.

After Replacement

Once the new battery is installed, the watch should start immediately. If it does not, check polarity and ensure the battery is fully seated. Some watches need a slight tap or movement to restart the quartz movement. If problems persist, the movement may need servicing.

Keep the old battery for a few days in case you need to verify the type. Then recycle it at a designated collection point. For battery options, compare trusted brands. Not sure which battery you need? Check our equivalent batteries guide.

Common Replacement Questions

How often should I replace my watch battery? Most SR626SW batteries last 1–3 years. Replace when the watch stops, runs slow, or the second hand jumps in two-second intervals.

Can I replace the battery myself? Yes, for many watches. You need a case opener, tweezers, and a new battery. Water-resistant watches may require professional service to maintain the seal.

What if the new battery does not work? Check polarity and ensure the battery is fully seated. Some watches need a slight tap to restart. If problems persist, the movement may need servicing.

Where can I recycle old watch batteries? Many electronics retailers and municipal waste facilities accept button cells. Do not dispose of them in regular trash. Proper recycling prevents environmental harm.

Key Takeaways

Replacing an SR626SW battery at home is achievable for most watch owners. With basic tools and a few minutes of care, you can extend the life of your timepiece. The key is using the correct battery type, handling it properly, and knowing when to seek professional help.

Water-resistant watches and luxury timepieces often warrant professional service. For standard watches with snap-off or screw-down backs, DIY replacement is usually straightforward. Keep your workspace clean, work slowly, and never force components. When in doubt, consult a jeweler.

Choosing the Right Battery for Replacement

Before opening your watch, obtain the correct replacement battery. Check our equivalents page if your device lists a different code. Silver-oxide is preferred for watches; avoid alkaline unless the device specifically allows it. Compare brands to find a quality option.

Handle the new battery with clean, dry hands or tweezers. Skin oils can reduce performance. Insert with correct polarity—positive usually faces up. If the watch has a plastic retainer or clip, replace it after inserting the battery. A snug fit ensures good contact.

Related Resources

Not sure which battery you need? Our equivalent batteries page lists all compatible codes. Compare brands to find quality options. Confused about SR626SW vs alkaline? See our SR626SW vs LR626 comparison. Is 377 the same? Check SR626SW vs 377.