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Can You Replace the Battery in a Seiko Solar Watch?

Tim Carter
Written by Tim Carter Last Updated: July 11, 2022

The high quality and innovative designs of the Seiko watch brand are well known. There is a wide range of styles to choose from for both men and women. Seiko solar watches are especially popular, as they are durable and elegant. Besides, sunlight powers them. But do they have a battery? And can you replace the battery in a Seiko solar watch if it stops functioning?

You can replace the battery in your Seiko watch. Your battery may become depleted for various causes, such as long-term usage or usage conditions, so the recharge efficiency of a rechargeable battery may deteriorate. 

Since the invention of the early solar-powered watches, solar cells on your timepieces have undergone significant advances in efficiency and storage capacity.

The storage capacity of today’s solar-powered watch is so large that it may run for up to 3,175 days (nearly eight years) without requiring additional charging.

Seiko Solar watches are powered by light. They have a solar cell beneath the dial that converts sunlight into electrical energy, which is then used to power the watch.

The amount of energy that can be stored in the watch’s battery depends on the model, but it can typically run for several months without being exposed to light.

However, if you leave your watch in a dark drawer, it will eventually stop working and will need to be recharged by exposure to light.

Table of Contents

What’s the Difference Between Quartz and Solar Watches?

Quartz watches operate by using an electric charge to power a quartz crystal.

Solar watches rely on solar cells to convert light into electrical energy. They are environmentally friendly, and are more accurate than quartz watches, as temperature changes do not affect them.

A Solar Watch is a watch that converts light energy into electrical energy through a solar cell. A solar cell (a solar cell unit beneath the dial) transforms light energy into electronic energy. The rechargeable battery stores the power and uses it to drive the timepiece.

How To Charge a Seiko Solar Watch?

Recharging will not occur if the light is insufficient or if the solar watch is not exposed to sufficient light for enough time.

If the amount of light and the time you have exposed your watch to light is not sufficient, you won’t get as much recharging as you want.

A rechargeable battery, unlike a disposable batteries like as dry batteries and button batteries, is an environmentally friendly battery.

It may be recharged and discharged many times to make it last for a long time.

It is necessary to expose a solar watch to light to recharge it.

Because room lighting is less intense than sunlight, the time required to recharge the watch is longer.

Place the watch by a window and sun it with the dial facing the sun when recharging it.

When recharging the watch, place it near a window and expose it to sunshine with the dial facing toward the sun. When charging the watch, make sure that it isn’t exposed to heat.

A solar watch can’t be recharged in the dark.

The following circumstances are likely to result in the watch’s energy running out, resulting in its stopping.

  1. You hide the watch behind your sleeve.
  2. You are not using your watch or keeping it in a location that doesn’t have enough light for an extended period.

The watch does not have enough power stored in its battery to be worn on the wrist. When you’re not wearing it, make sure to put it near a window and let it soak up some sunshine.

For How Long Does a Solar Watch Needs To Be Charged?

Although we recommend keeping your solar watch in direct sunlight when charging it, solar watches can absorb artificial light as well.

Yet, artificial light is not as efficient as sunlight.

Compare the data in the table:

Seiko solar watch charging time table comparison

Do Seiko Solar Watches Require Maintenance?

For various causes, such as long-term usage or usage conditions, the capacity or recharge efficiency of a rechargeable battery may gradually deteriorate.

Worn or unclean mechanical parts, oils, and batteries can all reduce recharging cycles.

To guarantee that it works properly so that you can use your solar watch for a long time, we recommend having it serviced (overhauled) every three or four years.

A watch’s overhaul is like a health checkup for a timepiece.

It’s critical to look inside the watch for oil retention, screws that are too tight, rust from dirt and sweat, and other issues.

By servicing it, you will remove the dirt and perspiration on an unseen region during an overhaul, ensuring that functions and water resistance continue to work as smoothly as a new timepiece.

Seiko timepieces will serve you for a long time with minimal maintenance.

However, like any precise equipment, a watch must be serviced regularly to assure that it performs flawlessly.

Why Take a Solar Seiko Watch for Maintenance?

Worn-out movement parts, as well as old oil within the mechanism, can cause a watch to lose time or cease.

As a result, our technical experts will check the timepiece for any damaged components that need to be replaced or repaired, and the disassembled components will be cleaned and lubricated again.

A watch’s water resistance is not permanent.

Gaskets or watch components distortion because of an accidental shock might affect it.

Gasket deterioration may lead to rust or dampness inside the movement.

When Should You Replace the Battery in a Seiko Solar Watch?

Solar-powered timepieces have the benefit of practically always charging, so they only use the power reserve when there is no light source.

However, there are a few things to remember regarding the watches’ propensity to be continually charged.

To begin with, frequent recharges will destroy the battery in the watch – just like any rechargeable battery, they can only endure so many recharges before the battery life starts degrading.

Second, Seiko recommends you change the battery every ten years to guarantee optimum performance.

Remember that the watches can last over ten years if properly cared for.

Some solar watches include a second battery and, according to some tests, a secondary battery can keep 80% of its storage capacity after 20 years.

So, even though your battery will need to be replaced after ten years, it is conceivable that your watch may survive for much longer.

However, we have to warn you not to charge your solar watch in direct sunlight or leave it on the dashboard of a vehicle, as the watch’s temperature rises to an excessive degree, causing a malfunction.

Final Thoughts

The most reputable companies provide high-quality timepieces that will last a long time. It also implies you’ll get a manufacturer’s warranty, which will give you peace of mind in the event anything goes wrong.

Seiko watches are also known for their durability, making them a good choice for people who are looking for a watch that will last.

Solar-powered Seiko timepieces use light to power their mechanisms. A solar cell beneath the dial converts sunlight into electrical energy, which is then used to run the watch.

We recommend having your watch serviced every three years at an official Seiko Service Center.


Tim Carter
Tim Carter

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