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Written by: Administrator

Category: Button Cell Battery

Published: 07 September 2026

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There is something refreshing about an old quartz chronograph that simply works.

No winding. No mechanical power reserve to worry about. No regular disposable battery changes. Put it somewhere with reasonable access to light, wear it, and let the electronics do their job.

That is essentially the appeal of the Seiko V17 family.

The V172, V174, V175, and V176 calibers were designed around the same basic idea: combine Seiko's solar charging technology with a quartz chronograph and package it into a practical sports watch.

Years later, these watches remain interesting — particularly on the second-hand market.

But there is one part of an older Seiko V17 that deserves much more attention than scratches, bracelets, or bezel wear:

the rechargeable energy-storage cell.

If that cell has lost much of its capacity, a previously excellent solar chronograph can suddenly behave like a watch that is on its last legs.

Fortunately, that does not necessarily mean the movement is finished.

The Real Appeal of the V17 Family

The Seiko V17 platform is interesting because it solves a very ordinary problem in an unusually effective way.

A conventional quartz watch needs a disposable battery. Eventually, the battery runs down and has to be replaced.

A mechanical chronograph takes the opposite approach: it uses mechanical energy and requires considerably more mechanical complexity.

A Seiko solar chronograph sits somewhere in between.

Light reaches the solar cell under the dial, electricity is generated, and that energy is stored in a rechargeable cell.

In daily use, the result is remarkably convenient.

You are not constantly thinking about the power source.

That is exactly what I want from a practical sports watch.

V172, V174, V175 or V176?

This is where things get more interesting.

The four calibers are related, but they are not identical.

Caliber	Character	Stopwatch
V172	Feature-rich	1/5 second
V174	More complicated display	1/5 second
V175	Solar Diver-oriented	1/5 second
V176	Simpler chronograph	1/20 second

The V172 is particularly attractive if you want an alarm in addition to the chronograph.

The V174 adds a 24-hour indication, giving the dial a more technical appearance.

The V175 is the model that gets my attention if you like Seiko's Solar Diver concept.

And the V176 is arguably the most straightforward choice: solar power and chronograph functionality without trying to do everything at once.

V172: The All-Rounder

The V172 is probably the easiest model to understand.

It gives you the things most people expect from a sports chronograph:

• Timekeeping
• Date
• Stopwatch
• Solar charging

Then Seiko adds an alarm.

That extra function makes the V172 more versatile than a basic solar chronograph.

It is also the kind of feature that makes more sense once you actually live with the watch. You may not use the alarm every day, but when you need it, having it on your wrist is convenient.

From a second-hand perspective, I would consider the V172 a particularly sensible choice for someone who wants an older Seiko chronograph without moving into mechanical-watch maintenance.

V174: More Information, More Personality

The V174 takes the same general formula and makes the dial more sophisticated.

Its 24-hour indication provides an additional way of reading the time and helps distinguish AM from PM.

But there is also a visual advantage.

The V174 looks like a serious instrument.

That matters because a chronograph is partly about function and partly about character. A busy dial, multiple hands, sub-dials, and pushers give the watch the visual identity people expect from a sports chronograph.

The trade-off is readability.

If you prefer minimalist watches, the V174 may feel unnecessarily complicated.

If you enjoy instrument-style watches, however, that complexity is part of its charm.

V175: The One I Would Watch Closely

The V175 is arguably the most interesting caliber for enthusiasts.

Its association with Seiko's Solar Diver models gives it a different personality from a conventional dress-oriented solar quartz watch.

It is built around a much more obviously sporting concept.

That makes the condition of the case and seals particularly important when shopping for a used example.

A seller may tell you that a V175 is "water resistant" or "ready for diving."

I would not take that statement at face value on an older watch.

A gasket can deteriorate even while the movement continues to run perfectly.

After years of use, water resistance should be verified rather than assumed.

For a collector, this is an important distinction:

A functioning watch is not necessarily a watertight watch.

V176: The Simple Choice

Sometimes less is more.

The V176 is appealing precisely because it avoids some of the additional functions found in the other calibers.

It retains the solar-powered quartz chronograph concept while offering a 1/20-second stopwatch configuration.

If your priority is everyday practicality rather than maximum functionality, the V176 makes a convincing case for itself.

There is also something satisfying about a watch that does exactly what you need without adding unnecessary complications.

The Battery Is the Part Most Buyers Forget

This is probably the most important point when buying an older Seiko V17.

People inspect:

• Crystal
• Bezel
• Bracelet
• Case
• Dial
• Hands
• Pushers

But many buyers forget to ask:

How well does it hold a charge?

A solar watch still contains an energy-storage cell.

Solar technology eliminates the need for frequent disposable battery replacement, but it does not make the rechargeable cell immortal.

After many years of charging cycles, the storage capacity can decline.

That can produce symptoms that look like a serious movement problem.

The Two-Second Warning

One of the easiest clues to recognize is the seconds hand.

If it moves normally once per second, the power level is generally adequate.

If it begins moving in two-second increments, the watch is signaling a low-power condition.

This is important because the correct first response is not necessarily:

"Replace the battery."

Instead:

Give the watch enough light to recharge.

If it returns to normal operation, the watch may simply have been undercharged.

But if it receives substantial light and repeatedly returns to the two-second indication, the rechargeable cell becomes much more suspicious.

When Should You Consider a Replacement Cell?

There are several warning signs.

The watch charges very slowly

Aging energy storage can reduce practical charging performance.

The watch stops after a relatively short period without light

This is one of the strongest reasons to investigate the rechargeable cell.

Two-second jumping keeps returning

If adequate charging does not solve the problem, further diagnosis is necessary.

The watch has been unused for years

A long period of storage does not guarantee that the energy-storage cell remains healthy.

At this point, a correctly specified Seiko replacement battery may be a sensible maintenance investment.

What Replacement Battery Should You Buy?

This is where buyers need to slow down.

The V17 family is associated with rechargeable storage-cell references such as:

• TS920E
• MT920
• 3023-series references

However, the name printed on an online listing is not enough.

A battery can have a similar size while having a different terminal arrangement.

For that reason, when ordering a Seiko replacement battery, compare the replacement with the original part.

Check:

• Caliber
• Battery reference
• Diameter
• Thickness
• Terminal design
• Contact position
• Polarity
• Mounting arrangement

This is especially important for the V172/V174/V175/V176 family because the correct physical configuration matters just as much as the nominal battery specification.

Never Treat It Like a CR2032

A common mistake in DIY watch repair is to think:

"If the voltage is similar and it fits, it should work."

That is not a safe assumption here.

A solar watch needs an appropriate rechargeable energy-storage component.

A conventional disposable coin cell such as a CR2032 is not a generic replacement for a solar watch's rechargeable cell.

The charging system is designed around a rechargeable storage component.

Therefore, use a suitable Seiko replacement battery rather than improvising with a standard disposable battery.

How Difficult Is the Replacement?

I would put the job somewhere between hobbyist repair and professional watch servicing.

The battery itself is not complicated.

The environment around it is.

You are working next to:

• Electronic circuits
• Tiny contacts
• Solar components
• Coil assemblies
• Precision movement parts
• Chronograph components

A careless screwdriver can turn a relatively inexpensive battery replacement into a much more expensive movement repair.

For that reason, I would not recommend the V17 series as the first watch for someone learning watch repair.

A Sensible Battery Replacement Procedure

If you already have suitable watchmaking experience, the general procedure is straightforward.

1. Identify the Caliber

Look at the case back and find the caliber code.

It may read something like:

V172-xxxx

or another V17-family designation.

Do this before ordering the battery.

2. Open the Case Carefully

The exact technique depends on the case-back construction.

A screw-down case back requires the correct opener.

A press-fit case back requires the appropriate pry point and case knife.

Do not improvise with household tools.

3. Inspect the Gasket

Before removing the old storage cell, examine the gasket.

If it is:

• Hard
• Flattened
• Cracked
• Deformed
• Dry

replace it.

For a diving model, this step is particularly important.

4. Photograph the Original Battery

Before removal, take a photograph.

Record:

• Part number
• Polarity
• Terminal orientation
• Position
• Retaining method

This takes seconds and can prevent a surprisingly frustrating reassembly problem.

5. Remove the Retaining Structure

Use non-magnetic precision tweezers and an appropriate screwdriver.

Avoid unnecessary contact with the movement electronics.

6. Install the New Cell

Compare the replacement against the original before installation.

Never force the cell into place.

Do not unnecessarily bend the terminals.

If the replacement is supplied with the appropriate contact or terminal configuration, installation is generally much easier.

Avoid Excessive Heat

If the battery is supplied with a specialized terminal or contact arrangement, do not automatically approach the job as if you were repairing a circuit board.

Directly heating a small rechargeable cell for too long is undesirable.

If the correct battery configuration is available, using that configuration is preferable to improvising a soldering solution.

For anyone without appropriate equipment, professional installation is the safer option.

What Happens After Installation?

This is another point where people can become unnecessarily worried.

A newly installed rechargeable cell may not be fully charged.

So don't install it and immediately conclude that the watch is defective because it does not instantly behave like a fully charged watch.

Give the watch appropriate exposure to light.

Then check:

• Seconds-hand behavior
• Chronograph operation
• Date change
• Alarm on applicable calibers
• 24-hour indication
• Stopwatch hand reset

If the watch is still behaving abnormally, continue diagnosis rather than immediately buying another battery.

The Chronograph Reset Problem

Suppose you have completed a battery replacement and press the reset button.

The stopwatch hand stops, but it does not return exactly to 12 o'clock.

That does not necessarily mean that the movement has failed.

The stopwatch hands have a preliminary reference position, and that position can require adjustment.

This is particularly relevant after servicing because the hands may need to be recalibrated.

So if your newly serviced Seiko V17 appears to have a "misaligned" chronograph hand, check the calibration procedure before condemning the movement.

V175 Owners Have One Extra Responsibility

If your watch is a V175-based diving model, I would be stricter.

After opening the case, the service should ideally include:

Gasket inspection

→

Cleaning

→

Lubrication where specified

→

Correct case-back installation

→

Water-resistance testing

This is not an optional cosmetic step.

Water entering a watch can damage components that are far more expensive than a Seiko replacement battery.

If you intend to dive with an older V175, have its water resistance professionally tested.

How Does the V17 Family Perform Today?

The answer depends on what you expect from a watch.

If you want smartwatch functionality, obviously the V17 is from another era.

If you want mechanical luxury, there are more sophisticated options.

But if your requirements are:

• Accurate quartz timekeeping
• Chronograph functionality
• Solar charging
• Long periods between servicing
• Strong everyday usability

then the V17 concept remains surprisingly relevant.

That is the reason the Seiko V17 family continues to make sense on the used market.

My Ranking

If I were choosing between the four calibers, my preferences would be:

1. V175 — Best for Enthusiasts

The Solar Diver connection gives it the strongest sporting identity.

2. V172 — Best All-Rounder

The alarm makes it unusually versatile.

3. V174 — Best for Dial Complexity

Ideal if you like a technical, information-rich appearance.

4. V176 — Best for Simplicity

The choice for people who want the solar chronograph concept without unnecessary extras.

Of course, the condition of the individual watch matters more than the ranking.

A clean, properly serviced V176 is a better purchase than a neglected V175.

What to Check Before Buying Used

This is the checklist I would actually use.

Power

Put the watch under an appropriate light source and see whether the seconds hand behaves normally.

Charging

Ask how long it holds a charge after being removed from light.

Chronograph

Test:

Start → Stop → Reset

Do not simply check whether the buttons click.

Verify that the hands actually behave correctly.

Date

Check whether the date changes normally.

Alarm

On V172/V174 models, test the alarm function.

Stopwatch Zero Position

Make sure the hands return correctly.

Case and Gasket

Look for signs of previous opening, gasket deterioration, corrosion, or moisture damage.

V175 Water Resistance

If the seller claims the watch can still be used for diving, ask for a recent pressure-test result.

Is a Battery Replacement Worth the Money?

In many cases, yes.

That is one of the strongest arguments for buying an older solar quartz Seiko rather than immediately replacing the entire watch.

If the:

• Movement is healthy
• Dial is good
• Crystal is acceptable
• Chronograph works
• Case is structurally sound
• Solar cell is functional

then replacing the aging storage cell can restore useful service life.

The key is to distinguish between:

an old battery

and

an old movement.

They are not the same problem.

A watch that refuses to hold a charge may simply need the right Seiko replacement battery.

Final Rating

Category	V172	V174	V175	V176
Everyday Use	9.2	9.0	9.0	9.3
Quartz Accuracy	9.5	9.5	9.5	9.5
Chronograph	9.0	9.0	9.0	9.5
Features	9.5	9.5	8.5	8.0
Maintenance	8.5	8.5	7.5	8.5
Collector Appeal	8.8	8.8	9.5	8.5
Used-Market Value	9.0	8.7	9.3	8.8
Overall	9.1/10	9.0/10	9.2/10	8.9/10

Final Thoughts: An Old Seiko That Still Has a Point

The appeal of the Seiko V17 family becomes clearer when you stop comparing it with modern smartwatches or luxury mechanical chronographs.

It was designed around a much simpler objective:

Make a useful chronograph that keeps accurate time and does not constantly ask its owner for attention.

That philosophy still works.

The V172 is the practical all-rounder.

The V174 is the more elaborate option.

The V175 is the enthusiast's choice, particularly for Solar Diver fans.

The V176 is the straightforward workhorse.

And all four share the same important long-term consideration: the rechargeable storage cell will eventually age.

That does not make the watch obsolete.

It simply means that the energy-storage component should be treated as a service item.

For an older Seiko solar chronograph that has begun losing its charge, a correctly selected Seiko replacement battery may be one of the most worthwhile repairs you can make.

The important part is choosing the correct component rather than treating every similarly sized rechargeable watch cell as interchangeable.

In other words, when buying a used V17-family watch, don't just ask:

"Does it look good?"

Ask:

"Does it charge, does the chronograph work, and can the energy-storage system still hold that charge?"

Those three questions will tell you far more about the real value of an older Seiko solar chronograph.