How to Change a Casio Watch Battery?

The Casio watch has been around for such a long time, and it’s still popular today. There are many different models of Casio watches on the market, but all of them require batteries to power their engine movement. Casio watch batteries are made with care to deliver the best possible performance. Each battery is designed specifically for each watch model to ensure reliable and long-lasting power. When you need a replacing Casio watch battery, you can be sure that you’re getting the best possible quality Casio batteries.

When your battery dies, you can’t tell the time! It is important to change your battery when necessary to ensure that you’re always able to use your watch. This post will teach you how to replace Casio watch battery so that it never stops ticking again.

Casio Watch Battery Replacement Chart

Model Number Battery Type Battery Size
G-Shock G-300 CR2016 3V
G-Shock G-9300 CR2025 3V
G-Shock G-7900 CR2032 3V
G-Shock G-6900 CR2016 3V
G-Shock G-5600 CR2025 3V
G-Shock GA-110 CR2032 3V
G-Shock GW-6900 CR2016 3V
G-Shock GW-5600 CR2025 3V
Baby-G BGA-100 CR2032 3V
Baby-G BGA-110 CR2016 3V
Baby-G BGD-500 CR2025 3V
Pro Trek PRW-3000 CR2032 3V
Pro Trek PRW-3500 CR2016 3V
Pro Trek PRG-250 CR2025 3V
Edifice EF-550 CR2032 3V
Edifice EF-500 CR2016 3V
Edifice EF-527 CR2025 3V

How to change Casio watch battery?

Casio watch battery replacement is not that difficult. In fact, the process can take you to replace the battery in 2 minutes or less with the right tools in your hand. This work may require extra care and precision. So, let’s get into the business of how to change a Casio watch battery.

First, you need to purchase a new battery that is compatible with your particular model. Make sure that you have the right Casio watch battery size. You can check this list of Casio watches and their corresponding replacement batteries from the Casio official website. Or you can also visit your local watch shop and ask for a recommendation on which battery to get. This will help you to know what kind of battery does a Casio watch take.

An additional safety option is to place a towel underneath all your tools to prevent any scratches on your watch’s glass or other parts.

Second, once you have the new battery, it is now that time to remove the watch battery cover
panel. The process of removing the watch’s cover will depend on the type of Casio watch you have. The most common way to remove a cover is by using a Phillips head screwdriver to loosen the screws and gently prying off the back panel from one side until it pops open. Be careful not to scratch your watch when doing this step, so take extra care. Be sure to place it (with its screws) somewhere safe, as you will need to return these back towards the end of the process.

Third, after removing the cover panel, you will see that the battery is being held by some sort of a cover clip. Depending on the watch model, your watch’s cover clip may be a little different, but they will all require you to unsnap one end, where you must un-hook or possibly remove a small screw. Follow the steps below:

  • To unclasp this clip, you’ll need a tiny screwdriver. Insert the screwdriver blade into the tiny hole on the clip’s end.
  • Lift the end of the clip over the retainer with a screwdriver. The clip will pop open as a result.

Fourth, remove the old battery gently by sliding it out. You can grab and use a pair of tweezers if it is too difficult to remove with just bare hands. Removing a watch battery is a simple task. The most important thing to remember is to be careful not to damage the battery’s metal contacts or the other little parts of the watch’s engine.

Fifth, insert the new battery and gently snap back the cover clip. Make sure that you match the + and – symbols on your watch with that of the replacement battery. Be very careful in doing this step so you don’t accidentally break anything during installation or cause damage to your watch by having its parts not fit right anymore after replacing the battery. You can do a quick check by flipping over the watch and see if it is working properly.

Sixth, return the cover panel and all the screws into their proper places by tightening them down gently with a Phillips head screwdriver until they don’t budge anymore. And you’re done! You just successfully changed the battery in your Casio watch!

How often do you change the battery in your Casio watch?

The battery life will vary depending on how much you use your watch and some other factors, but it is ideal to replace the battery in your Casio watch every 18 months for the best results.

In addition, the battery’s manufacturing brand has a major influence on its life expectancy. The lower the quality of the battery and the longer the battery has been kept before installation, the more likely it is that the battery will need to be changed soon. So you should also check this one as well.

How long do Casio watches last can affect how often you need to change the battery. If you have a Casio watch over three years old, it is probably time to change the battery. However, if you have a newer model, you may be able to wait up to 5 years before changing the battery.

The Casio watch battery replacement cost will depend on the model of the watch you have and where you go to have the work done. Generally, you can expect to pay between $10 and $30 for a new battery. You may be able to find a cheaper option if you shop around, but it is important to make sure you find a reputable watchmaker to do the work. Otherwise, you could end up damaging your watch.

What are the signs that prompt you to change the battery?

You can tell that it is time to change the battery when your watch becomes slow or stops working at.

You may think that your watch is just slowing down when it has lost power, but there are other possible symptoms like the second’s hand can jump or skip a few seconds at once, and the time will no longer keep accurate. When you have experienced these symptoms, it is time to change the battery.


The Casio watch uses batteries that should be replaced on a regular basis. It is best that you are equipped with the knowledge on how to replace the battery when the time comes, so you don’t have any inconveniences with your watch not working properly. If ever you notice that your watch is losing time or isn’t displaying the correct date/time, this could be a sign of needing to change the battery. Be sure to use the recommended battery for your watch model to avoid any damage to your favorite timepiece.

About the author, Phil Borges

Phil Borges is a battery aficionado. He's written extensively about batteries, and he loves nothing more than discussing the latest innovations in the industry. He has a deep understanding of how batteries work, and he's always on the lookout for new ways to improve their performance.