Changing Batteries in Wristwatches – How to Do It Properly

Quartz watches are known for their high accuracy and everyday practicality. At their core is a small battery that sets the quartz crystal into motion and ensures precise timekeeping. Even though these batteries often last for several years, there comes a time when they need to be replaced. Many watch wearers then ask themselves: Can you change the battery yourself, or should you consult a professional? In this guide, you’ll learn how a battery replacement in a wristwatch works, which mistakes you should avoid, and why professional execution is crucial for the lifespan of your watch.

Why battery replacement is important

A weak battery often shows itself gradually: the watch stops, the hands move irregularly, or the display flickers. By then at the latest, you should replace the battery. If this is delayed, a leaking battery can damage the movement—an expensive problem that you can easily avoid. Replacing it in time therefore protects not only the function but also the substance of your watch.

How long does a watch battery last?

The lifespan of a battery depends on several factors: the type of watch, additional functions, and the quality of the battery. As a rule, batteries last between 1 and 3 years. Models with lighting, a chronograph, or a radio module require more energy and therefore need a new battery more often. In contrast, simple quartz watches often run for several years on one battery.

Replace it yourself or go to a watchmaker?

In principle, it is possible to replace a watch battery yourself. Online, you’ll find numerous guides and tool sets. However, a DIY attempt carries risks: even the smallest mistakes can damage the case, seals, or movement. This is especially true for water-resistant wristwatches, where it is advisable to see a professional, since the water resistance should also be checked after the battery replacement. Professional watchmakers have the necessary tools and equipment to carry out the replacement safely and properly.

Step by step: battery replacement by a professional

1. Opening the case: Depending on the model, the case back is screwed, pressed, or secured with small screws. Professionals use special tools to avoid damage.

2. Removing the old battery: Using tweezers, the battery is carefully removed from its holder. Care is taken not to damage any metal parts in the movement.

3. Inserting the new battery: Only high-quality brand batteries are used. They are inserted precisely so that contact and voltage are correctly established.

4. Testing the functions: After insertion, the watch is tested immediately. If it runs correctly, it moves on to the next step.

5. Checking the seals: Especially with water-resistant watches, the seals are checked and replaced if necessary.

6. Closing the case: The back is carefully closed, often with a defined torque, to ensure water resistance.

7. Water-resistance test: Special equipment is used to check whether the watch still meets the specified water resistance after the replacement.

Tips for doing it yourself

If you want to replace the battery yourself, please note the following points:

• Use a clean, brightly lit work area.
• Use only suitable tools, not improvised objects.
• Do not touch the battery with bare fingers—grease and sweat can affect the contacts.
• Pay attention to the correct polarity when inserting it.
• Close the case back carefully so that no dust or moisture can enter.

Despite all caution, the following applies: for high-quality watches, a professional is the better choice.

Special notes for radio-controlled watches and smartwatches

Radio-controlled watches: After a battery replacement, radio-controlled watches usually start a new synchronization cycle automatically. This can take anywhere from a few minutes to several hours. Place the watch near a window to improve reception.

Smartwatches: Many smartwatches do not have a classic battery, but rather a rechargeable battery. Here, a battery replacement is usually only possible through the manufacturer or a service partner.

Common mistakes when replacing a battery

Wrong battery: Watch batteries differ in size, voltage, and capacity. The wrong battery can affect performance.

Damaged seals: If seals are crushed or forgotten when opening the watch, it loses its water resistance.

Overtightening the back: This can damage threads or warp the back.

Working untidily: Dust or dirt particles in the movement can cause damage over time.

Frequently asked questions about battery replacement

How can I tell that my battery is empty?
If the watch stops or, in quartz watches, the seconds hand jumps in 4-second increments, a battery replacement is necessary.

Can an old battery leak?
Yes, leaking batteries can damage the movement. That’s why they should be replaced in time.

How much does a battery replacement cost at a watchmaker?
Depending on the model, between 10 and 30 Euro, and a bit more for water-resistant watches with a pressure test.

How long does a battery replacement take?
Usually only a few minutes. With extensive tests and checks, it can take a little longer.

Conclusion: replace it on time and professionally

Battery replacement is an unavoidable part of quartz watches. If you do it in time, you protect your watch from damage and maintain its reliability. While simple watch batteries can also be replaced at home, high-quality or water-resistant models are best handled by a professional. That way, your wristwatch remains a long-lasting companion—precise, reliable, and protected from outside influences.