Casio Watches - Recent Questions, Troubleshooting & Support


Take your Casio watch to a jeweler for battery identification and replacement.

Casio Watches | Answered on Jun 21, 2017


Hey Joann, try replacing the battery anyway... should fix the issue.

Casio Watches | Answered on Jun 19, 2017


this video will show you were the spring goes next to battery

Casio G-shock... | Answered on Jun 14, 2017


Try Googling (casio)(5121)(manual) without parens for instructions.

Casio Watches | Answered on Jun 10, 2017


I have a similar model.  The electronics sometimes needs to be reset after the battery is changes.  Get a magnifying glass and look closely at the stainless frame around the battery.  There is a small AC mark and a triangle which points toward a small gold contact down in an adjacent hole.  This contact must be shorted momentarily to the + side of the battery to reset the display.  You can bend a metal paper clip to make the connection.  You may have to try several times before it resets. It should reset to 12:00 and start running.

Casio Watches | Answered on Jun 02, 2017


According to their site, they don't want you replacing the battery. The battery is a silver oxide type, and the number is sr927W. You can find one with a google search. I'm including a link to a youtube video for 320, which might be close enough. If it is, you'll need a tool they mention that they say costs $6 How to change the battery on Casio AMW 320R watch

Casio Watches | Answered on May 24, 2017


That means charge it. I.e. expose it to sunlight

Casio G-Shock... | Answered on May 24, 2017


Check out this link: you have to scroll to the bottom of the screen to find the 'Next Page' to click on and progress through the manual
http://mygshock.com/casio-manual/3054/

Casio Watches | Answered on May 22, 2017


how to set time on my g-shock watch dont have my manaual.

Casio G-Shock... | Answered on May 18, 2017


CASIO module 3747, battery CR1620

Casio Watches | Answered on May 18, 2017

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