What battery does this watch use?\ Casio forester FT 500

Try the links. Casio has two distributors for parts.

MANUAL ' PRO TREK - Mens Watches - CASIO

https://protrek.com > asia-mea > support
WATCH MANUAL ARCHIVES. Use this page to download a copy of CASIO watch manuals in PDF. To download a PDF file, enter the four-digit (or three-digit) module ...
Missing: movement ‎' Must include: movement

Buy Parts - Casio Support Page ' Casio USA

https://www.casio.com > support > buy-parts
For end-users looking to purchase Casio watch bands and watch parts, please contact one of our Parts Distributors* below: West Coast PacParts, Inc.
Missing: prt500 ‎1376

Casio ProTreck PRT-500 Please Help - where do the springs ...

https://www.watchuseek.com > ... > Casio G-Shock
Dec 10, 2013 - Hi there! After finding my old PRT-500 in a drawer I took it to a shop to replace the battery. They messed it up, the watch displayed "open" ...
Casio PRT-500 issues/ watch to replace it - Watchuseek
Jul 11, 2008
CASIO PRT-500. Please HELP ME. - Watchuseek
Oct 10, 2006
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CTL1616 and there is a video on you tube showing you how to do it.

I assume this is the casio Forester.

https://www.youtube.com/watch?v=I9VGeriSTOI CASIO FORESTER

The Casio Forester FT500WVB watch has an EL (Electroluminescent) backlight and requires one silver oxide button battery. The SR621W battery (also known as type 363) is recommended by the instruction manual for the watch. Note the suffix "W" means this battery is a high drain type which is suitable for powering a watch mechanism and the EL light as well for 2 to 3 years, depending on use of the light. "SW" suffix batteries are low drain and are intended only to power a watch mechanism, and not a light. Note also the "SR" prefix indicates the battery is silver oxide and not lithium. The SR type batteries do not use mercury and are therefore safer to dispose of when they are discharged. I have found the type SR626W (also known as type 377) battery is also suitable for the FT500WVB watch and it has more stored power and should therefore last longer.

Last, the Casio Forrester FT500WC looks exactly like the FT500WVB, but it is a different watch internally. The FT500WC has an LED light and requires two batteries- the SR920SW low drain silver oxide battery which powers the watch mechanism and the CR1616 lithium battery which powers the LED. The LED is brighter than an EL light and stays on longer than the EL light when activated. But the LED has a bright dot light source that some might find annoying.

If you haven't got instructions on how to do this, you can get
instructions from the Casio web site.

Go to the casio web site "casio.com".

Select "support" and the "manuals",
watches;

Accept terms

Select "watch manual archive"

Read the number of the back of your watch and enter it into the search box

mcdevito75 here, The Internal workings of all watches and clocks, Quartz and mechanical is called the movement. You may have a weak or even dead battery, even if the battery is new. If you"ve dropped your watch, got it water logged, you could have hurt the Quartz movement. It'll take special equiptment to check the Quartz movement to see if it"s burned out. I would try another battery or at least double check this batteries instalation in your watch. For more info, here is Casio"s contact number, 800-435-7732 9AM--5PM EST.

mcdevito75 here, Of couse without the watch and piece of metal that fell out it"s very hard to say. Most likely it was part of the lock-down tab to keep the battery in place, in any event don"t lose that piece of metal. If your casio is working ok don"t worry about it, just don"t lose that piece of metal that fell out.

mcdevito75 here, Most likely 2 batteries. 1 for the illuminator on top once you remove the cover and 1 for the time mechanism.

Check out my tips here and find the instructions manual for your watch.

Check on back of watch for 4 letter module code and downlaod manual on Casio website.