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1Scan for outdated or missing drivers - takes under a minute2Clear out junk files and repair common Windows errors3Fix the driver behind crashes, sound loss and screen glitchesYes. A G-Shock battery can be replaced, but the correct battery depends on the watch’s model, and Casio recommends using the original retailer or an authorized service center. Casio Japan’s published fees range from ¥1,650 to ¥5,500, depending on the watch’s water-resistance category. Those prices apply to Japan only; elsewhere, request a local quote and ask for a water-resistance check with the replacement.
How much does G-Shock battery replacement cost?
Casio Japan’s published schedule, accessed in 2026, sets the following service fees by water-resistance category:
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| Watch category | Casio Japan fee |
|---|---|
| Non-water-resistant | ¥1,650 |
| Daily-use water resistance or 5 bar | ¥2,750 |
| 10 bar or 20 bar | ¥3,850 |
| Diver’s 200 m | ¥5,500 |
The listed fees include labor, water-resistance testing, and internal consumable parts. Shipping, packing, and transportation are additional. Premium service categories may have different prices, so check the service information for your specific model. Casio Japan’s battery replacement service page provides the published schedule. [c003]
These are Japan-specific prices, not a reliable estimate for other countries. Casio US provides repair-service routing, but its support information does not state a battery-replacement fee. Contact Casio or an authorized service provider in your country for the price and what it includes. Casio US support can help route a repair inquiry. [c004]
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Why have the replacement done by a service center?
Casio recommends taking the watch to the original retailer or an authorized Casio service center. Its guidance says battery replacement requires special tools and recommends asking for a water-resistance inspection at the same time. The battery service guidance also describes technician inspection as part of the process. Casio module 3567 guidance and module 5715 precautions set out these recommendations. [c001] [c002]
Replacing the battery is not, by itself, proof that the watch remains water resistant. If you rely on that protection, ask the service provider to inspect and test it before wearing the watch in water.
Rank #2
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- Wide Compatibility: The coaster has a diameter of 3.15 inches and a height of 1.18 inches, which is widely used in most vehicles, such as SUV, sedan, MPV, etc., as long as the size fits your car cup holder.
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How to arrange service
- Identify the watch. Find its model or module number on the case or in its documentation. The module number helps you locate the correct manual.
- Contact the local Casio service route or an authorized service center. Ask for a battery-replacement quote for that exact model and confirm what the fee covers.
- Request a water-resistance check. Ask whether testing is included and whether any additional work or charge would be needed if the watch does not pass.
Can you replace the battery yourself?
Casio’s guidance recommends professional service. If you are considering a DIY replacement, first consult the manual for your exact model: Casio says to use only the battery type specified in the watch’s specifications, because another type can cause malfunction. A toolkit does not identify the correct battery or provide a water-resistance test, so opening the watch does not establish that it is safe to use in water. [c001] [c002]
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A dim or blank display can indicate low battery power; significant timekeeping error is another possible sign. Casio advises replacing a low battery promptly because continued operation with insufficient power can cause malfunction. Check the model’s manual or ask a service provider if the display or timekeeping behavior is unclear. Casio’s module 3567 battery guidance covers these symptoms. [c001]
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